Intel、海光、鲲鹏920、飞腾2500 CPU性能对比

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Intel 海光 鲲鹏920 飞腾2500 CPU性能对比

为了让程序能快点，特意了解了CPU的各种原理，比如多核、超线程、NUMA、睿频、功耗、GPU、大小核再到分支预测、cache_line失效、加锁代价、IPC等各种指标（都有对应的代码和测试数据）都会在这系列文章中得到答案。当然一定会有程序员最关心的分支预测案例、Disruptor无锁案例、cache_line伪共享案例等等。

这次让我们从最底层的沙子开始用8篇文章来回答各种疑问以及大量的实验对比案例和测试数据。

大的方面主要是从这几个疑问来写这些文章：

  • 同样程序为什么CPU跑到800%还不如CPU跑到200%快？
  • IPC背后的原理和和程序效率的关系？
  • 为什么数据库领域都爱把NUMA关了，这对吗？
  • 几个国产芯片的性能到底怎么样？

系列文章

CPU的制造和概念

Perf IPC以及CPU性能

CPU性能和CACHE

CPU 性能和Cache Line

十年后数据库还是不敢拥抱NUMA？

Intel PAUSE指令变化是如何影响自旋锁以及MySQL的性能的

Intel、海光、鲲鹏920、飞腾2500 CPU性能对比

一次海光物理机资源竞争压测的记录

飞腾ARM芯片(FT2500)的性能测试

本篇是收尾篇，横向对比一下x86和ARM芯片，以及不同方案权衡下的性能比较

CPU基本信息

image-20210723161314138

海光

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#lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    2      //每个物理core有两个超线程
Core(s) per socket:    16     //每路16个物理core
Socket(s):             2      //2路
NUMA node(s):          4
Vendor ID:             HygonGenuine
CPU family:            24
Model:                 1
Model name:            Hygon C86 5280 16-core Processor
Stepping:              1
CPU MHz:               2455.552
CPU max MHz:           2500.0000
CPU min MHz:           1600.0000
BogoMIPS:              4999.26
Virtualization:        AMD-V
L1d cache:             32K
L1i cache:             64K
L2 cache:              512K
L3 cache:              8192K
NUMA node0 CPU(s):     0-7,32-39
NUMA node1 CPU(s):     8-15,40-47
NUMA node2 CPU(s):     16-23,48-55
NUMA node3 CPU(s):     24-31,56-63
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid amd_dcm aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate sme ssbd sev ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 MySQLeed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca
#numactl -H
available: 4 nodes (0-3)
node 0 cpus: 0 1 2 3 4 5 6 7 32 33 34 35 36 37 38 39
node 0 size: 128854 MB
node 0 free: 89350 MB
node 1 cpus: 8 9 10 11 12 13 14 15 40 41 42 43 44 45 46 47
node 1 size: 129019 MB
node 1 free: 89326 MB
node 2 cpus: 16 17 18 19 20 21 22 23 48 49 50 51 52 53 54 55
node 2 size: 128965 MB
node 2 free: 86542 MB
node 3 cpus: 24 25 26 27 28 29 30 31 56 57 58 59 60 61 62 63
node 3 size: 129020 MB
node 3 free: 98227 MB
node distances:
node   0   1   2   3
  0:  10  16  28  22
  1:  16  10  22  28
  2:  28  22  10  16
  3:  22  28  16  10

这CPU据说是胶水核，也就是把两个die拼一块封装成一块CPU，所以一块CPU内跨die之间延迟还是很高的。

64 个 core 的分配策略

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physical         core      processor
0                0~15         0~15
1                0~15         16~31
0                0~15         32~47
1                0~15         48~63

image-20210805085715353

Intel CPU

cascade lake naming scheme.svg

Cascade Lake架构相对Broadwell L1没变，L2从256K增加到1M增加了4倍，L3从2.5下降到1.38M每core

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#lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                104
On-line CPU(s) list:   0-103
Thread(s) per core:    2
Core(s) per socket:    26
座：                 2
NUMA 节点：         1
厂商 ID：           GenuineIntel
CPU 系列：          6
型号：              85
型号名称：        Intel(R) Xeon(R) Platinum 8269CY CPU @ 2.50GHz
步进：              7
CPU MHz：             1200.000
CPU max MHz:           2501.0000
CPU min MHz:           1200.0000
BogoMIPS：            5000.00
虚拟化：           VT-x
L1d 缓存：          32K
L1i 缓存：          32K
L2 缓存：           1024K
L3 缓存：           36608K
NUMA 节点0 CPU：    0-103
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb cat_l3 cdp_l3 intel_ppin intel_pt ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts pku ospke avx512_vnni spec_ctrl intel_stibp flush_l1d arch_capabilities
# numactl -H
available: 1 nodes (0)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
node 0 size: 785826 MB
node 0 free: 108373 MB
node distances:
node   0
  0:  10  
//志强E5
  #lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    2
Core(s) per socket:    16
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 79
Model name:            Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz
Stepping:              1
CPU MHz:               2500.000
CPU max MHz:           3000.0000
CPU min MHz:           1200.0000
BogoMIPS:              5000.06
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              40960K
NUMA node0 CPU(s):     0-15,32-47
NUMA node1 CPU(s):     16-31,48-63
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch ida arat epb invpcid_single pln pts dtherm spec_ctrl ibpb_support tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt rdseed adx smap xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local cat_l3
#numactl -H
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
node 0 size: 262008 MB
node 0 free: 240846 MB
node 1 cpus: 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
node 1 size: 262144 MB
node 1 free: 242774 MB
node distances:
node   0   1
  0:  10  21
  1:  21  10

鲲鹏920

鲲鹏920-4826的L1比8269C 大一倍，但是L2小一倍。L3鲲鹏为1M/core 8269为1.38M/core(物理core）

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#lscpu
Architecture:          aarch64
Byte Order:            Little Endian
CPU(s):                96
On-line CPU(s) list:   0-95
Thread(s) per core:    1
Core(s) per socket:    48
Socket(s):             2
NUMA node(s):          1
Model:                 0
CPU max MHz:           2600.0000
CPU min MHz:           200.0000
BogoMIPS:              200.00
L1d cache:             64K
L1i cache:             64K
L2 cache:              512K
L3 cache:              49152K
NUMA node0 CPU(s):     0-95
Flags:                 fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
#numactl -H
available: 4 nodes (0-3)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
node 0 size: 192832 MB
node 0 free: 187693 MB
node 1 cpus: 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
node 1 size: 193533 MB
node 1 free: 191827 MB
node 2 cpus: 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
node 2 size: 193533 MB
node 2 free: 192422 MB
node 3 cpus: 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
node 3 size: 193532 MB
node 3 free: 193139 MB
node distances:
node   0   1   2   3
  0:  10  12  20  22
  1:  12  10  22  24
  2:  20  22  10  12
  3:  22  24  12  10
#dmidecode -t processor | grep Version
    Version: Kunpeng 920-4826
    Version: Kunpeng 920-4826  
以上四个鲲鹏920的四个NUMA node之间的距离描述如下：
node 0 <------------ socket distance ------------> node 2
    | (die distance)                                  | (die distance)
node 1                                             node 3    
要注意node1到node3比node0到node3要大，猜测Socket之间的UPI只接上了node1和node2

鲲鹏920架构参考这里

img

Though Huawei has been keeping a tight lip on the chip design itself, the Hi1620 is actually a multi-chip design. Actually, we believe are three dies. The chip itself comprise two compute dies called the Super CPU cluster (SCCL), each one packing 32 cores. It’s also possible the SCCL only have 24 cores, in which case there are three such dies with a theoretical maximum core count of 72 cores possible but are not offered for yield reasons. Regardless of this, there are at least two SCCL dies for sure. Additionally, there is also an I/O die called the Super IO Cluster (SICL) which contains all the high-speed SerDes and low-speed I/Os.

下图是6426型号，我测试用的是4826型号，也就是一路CPU内是48core，一个CPU封装3个Die，两个Die是 core，还有一个是Super IO Cluster

taishan v110 soc details.svg

鲲鹏命令规范：

img

鲲鹏 RoadMap

img

鲲鹏 Kunpeng 920-4826 跨numa性能比较

绑24core，跨numa0、numa3，是numactl -H看到的比较远距离。两分钟的 Current tpmC: 69660

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#taskset -a -cp  12-23,72-83 20799
#perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads,cpu-migrations -p 20799
^C
 Performance counter stats for process id '20799':
     2,866,418,154      branch-misses                                                 (59.84%)
   549,673,215,827      bus-cycles                                                    (59.89%)
     2,179,816,578      cache-misses              #    2.360 % of all cache refs      (59.93%)
    92,377,674,343      cache-references                                              (60.04%)
   549,605,057,475      cpu-cycles                                                    (65.05%)
   229,958,980,614      instructions              #    0.42  insn per cycle
                                                  #    1.31  stalled cycles per insn  (65.05%)
   146,201,062,116      stalled-cycles-backend    #   26.60% backend cycles idle      (65.08%)
   301,814,831,043      stalled-cycles-frontend   #   54.91% frontend cycles idle     (65.08%)
     2,177,062,319      L1-dcache-load-misses     #    2.35% of all L1-dcache hits    (65.04%)
    92,481,797,426      L1-dcache-loads                                               (65.11%)
     2,175,030,428      L1-dcache-store-misses                                        (65.15%)
    92,507,474,710      L1-dcache-stores                                              (65.14%)
     9,299,812,249      L1-icache-load-misses     #   12.47% of all L1-icache hits    (65.20%)
    74,579,909,037      L1-icache-loads                                               (65.16%)
     2,862,664,443      branch-load-misses                                            (65.08%)
    52,826,930,842      branch-loads                                                  (65.04%)
     3,729,265,130      dTLB-load-misses          #    3.11% of all dTLB cache hits   (64.95%)
   119,896,014,498      dTLB-loads                                                    (59.90%)
     1,350,782,047      iTLB-load-misses          #    1.83% of all iTLB cache hits   (59.84%)
    74,005,620,378      iTLB-loads                                                    (59.82%)
               510      cpu-migrations
       9.483137760 seconds time elapsed

绑72-95core，在同一个numa下，但是没有重启进程，导致有一半内存仍然在numa0上，2分钟的Current tpmC: 75900

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#taskset -a -cp  72-95 20799
#perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads,cpu-migrations -p 20799
^C
 Performance counter stats for process id '20799':
     2,665,583,722      branch-misses                                                 (59.90%)
   500,184,789,050      bus-cycles                                                    (59.95%)
     1,997,726,097      cache-misses              #    2.254 % of all cache refs      (59.94%)
    88,628,013,529      cache-references                                              (59.93%)
   500,111,712,450      cpu-cycles                                                    (64.98%)
   221,098,464,920      instructions              #    0.44  insn per cycle
                                                  #    1.35  stalled cycles per insn  (65.02%)
   105,957,124,479      stalled-cycles-backend    #   21.19% backend cycles idle      (65.02%)
   298,186,439,955      stalled-cycles-frontend   #   59.62% frontend cycles idle     (65.02%)
     1,996,313,908      L1-dcache-load-misses     #    2.25% of all L1-dcache hits    (65.04%)
    88,701,699,646      L1-dcache-loads                                               (65.09%)
     1,997,851,364      L1-dcache-store-misses                                        (65.10%)
    88,614,658,960      L1-dcache-stores                                              (65.10%)
     8,635,807,737      L1-icache-load-misses     #   12.30% of all L1-icache hits    (65.13%)
    70,233,323,630      L1-icache-loads                                               (65.16%)
     2,665,567,783      branch-load-misses                                            (65.10%)
    50,482,936,168      branch-loads                                                  (65.09%)
     3,614,564,473      dTLB-load-misses          #    3.15% of all dTLB cache hits   (65.04%)
   114,619,822,486      dTLB-loads                                                    (59.96%)
     1,270,926,362      iTLB-load-misses          #    1.81% of all iTLB cache hits   (59.97%)
    70,248,645,721      iTLB-loads                                                    (59.94%)
               128      cpu-migrations
       8.610934700 seconds time elapsed
#/root/numa-maps-summary.pl </proc/20799/numa_maps
N0        :      8220658 ( 31.36 GB)
N1        :        38620 (  0.15 GB)
N2        :       480619 (  1.83 GB)
N3        :      8281759 ( 31.59 GB)
active    :        28797 (  0.11 GB)
anon      :     17015902 ( 64.91 GB)
dirty     :     16990615 ( 64.81 GB)
kernelpagesize_kB:         9076 (  0.03 GB)
mapmax    :          760 (  0.00 GB)
mapped    :         5754 (  0.02 GB)

重启进程后继续绑72-95core，在同一个numa下，先进成充分热身，然后2分钟的 Current tpmC: 77880

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#perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads,cpu-migrations -p 49512
^C
 Performance counter stats for process id '49512':
     1,849,313,199      branch-misses                                                 (59.99%)
   319,122,053,367      bus-cycles                                                    (60.02%)
     1,319,212,546      cache-misses              #    2.238 % of all cache refs      (59.95%)
    58,950,581,370      cache-references                                              (60.02%)
   319,088,767,311      cpu-cycles                                                    (65.01%)
   146,580,891,374      instructions              #    0.46  insn per cycle
                                                  #    1.32  stalled cycles per insn  (65.01%)
    61,109,919,226      stalled-cycles-backend    #   19.15% backend cycles idle      (65.04%)
   193,963,590,196      stalled-cycles-frontend   #   60.79% frontend cycles idle     (65.06%)
     1,319,593,051      L1-dcache-load-misses     #    2.24% of all L1-dcache hits    (65.03%)
    58,967,303,454      L1-dcache-loads                                               (65.04%)
     1,318,842,690      L1-dcache-store-misses                                        (65.13%)
    58,988,059,583      L1-dcache-stores                                              (65.07%)
     5,769,871,870      L1-icache-load-misses     #   12.25% of all L1-icache hits    (65.12%)
    47,085,299,316      L1-icache-loads                                               (65.10%)
     1,850,419,802      branch-load-misses                                            (65.03%)
    33,687,548,636      branch-loads                                                  (65.08%)
     2,375,028,039      dTLB-load-misses          #    3.12% of all dTLB cache hits   (65.08%)
    76,113,084,244      dTLB-loads                                                    (60.01%)
       825,388,210      iTLB-load-misses          #    1.75% of all iTLB cache hits   (59.99%)
    47,092,738,092      iTLB-loads                                                    (59.95%)
                49      cpu-migrations
#/root/numa-maps-summary.pl </proc/49512/numa_maps
N0        :         5765 (  0.02 GB)
N1        :        41599 (  0.16 GB)
N2        :          566 (  0.00 GB)
N3        :     16955491 ( 64.68 GB)
active    :        30430 (  0.12 GB)
anon      :     16997663 ( 64.84 GB)
dirty     :     16989252 ( 64.81 GB)
kernelpagesize_kB:         9020 (  0.03 GB)
mapmax    :          745 (  0.00 GB)
mapped    :         5758 (  0.02 GB)

IPC从0.42到0.44再到0.46，tpmC也不断增加，整体压力都不大只压了25%的CPU，所以跨NUMA大概有10%的性能差异. IPC也是0.42 VS 0.46 。测试场景是DRDS Server服务。

如果跨4core绑定core的话最好和最差绑法性能会下降25-30%，四个core绑不同numa的性能比较

被压进程绑定的core id tpmC
72,73,74,75 14460
48,49,72,73 13800
24,25,72,73 11760
0,1,72,73 11940
0,24,48,72 10800

飞腾2500

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#lscpu
Architecture:          aarch64
Byte Order:            Little Endian
CPU(s):                128
On-line CPU(s) list:   0-127
Thread(s) per core:    1
Core(s) per socket:    64
Socket(s):             2
NUMA node(s):          16
Model:                 3
BogoMIPS:              100.00
L1d cache:             32K
L1i cache:             32K
L2 cache:              2048K
L3 cache:              65536K
NUMA node0 CPU(s):     0-7
NUMA node1 CPU(s):     8-15
NUMA node2 CPU(s):     16-23
NUMA node3 CPU(s):     24-31
NUMA node4 CPU(s):     32-39
NUMA node5 CPU(s):     40-47
NUMA node6 CPU(s):     48-55
NUMA node7 CPU(s):     56-63
NUMA node8 CPU(s):     64-71
NUMA node9 CPU(s):     72-79
NUMA node10 CPU(s):    80-87
NUMA node11 CPU(s):    88-95
NUMA node12 CPU(s):    96-103
NUMA node13 CPU(s):    104-111
NUMA node14 CPU(s):    112-119
NUMA node15 CPU(s):    120-127
Flags:                 fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
node distances:
node   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
  0:  10  20  40  30  20  30  50  40  100  100  100  100  100  100  100  100
  1:  20  10  30  40  50  20  40  50  100  100  100  100  100  100  100  100
  2:  40  30  10  20  40  50  20  30  100  100  100  100  100  100  100  100
  3:  30  40  20  10  30  20  40  50  100  100  100  100  100  100  100  100
  4:  20  50  40  30  10  50  30  20  100  100  100  100  100  100  100  100
  5:  30  20  50  20  50  10  50  40  100  100  100  100  100  100  100  100
  6:  50  40  20  40  30  50  10  30  100  100  100  100  100  100  100  100
  7:  40  50  30  50  20  40  30  10  100  100  100  100  100  100  100  100
  8:  100  100  100  100  100  100  100  100  10  20  40  30  20  30  50  40
  9:  100  100  100  100  100  100  100  100  20  10  30  40  50  20  40  50
 10:  100  100  100  100  100  100  100  100  40  30  10  20  40  50  20  30
 11:  100  100  100  100  100  100  100  100  30  40  20  10  30  20  40  50
 12:  100  100  100  100  100  100  100  100  20  50  40  30  10  50  30  20
 13:  100  100  100  100  100  100  100  100  30  20  50  20  50  10  50  40
 14:  100  100  100  100  100  100  100  100  50  40  20  40  30  50  10  30
 15:  100  100  100  100  100  100  100  100  40  50  30  50  20  40  30  10
#dmidecode -t processor
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
# SMBIOS implementations newer than version 3.0 are not
# fully supported by this version of dmidecode.
Handle 0x0004, DMI type 4, 48 bytes
Processor Information
    Socket Designation: BGA3576
    Type: Central Processor
    Family: <OUT OF SPEC>
    Manufacturer: PHYTIUM
    ID: 00 00 00 00 70 1F 66 22
    Version: FT2500
    Voltage: 0.8 V
    External Clock: 50 MHz
    Max Speed: 2100 MHz
    Current Speed: 2100 MHz
    Status: Populated, Enabled
    Upgrade: Other
    L1 Cache Handle: 0x0005
    L2 Cache Handle: 0x0007
    L3 Cache Handle: 0x0008
    Serial Number: 1234567
    Asset Tag: No Asset Tag
    Part Number: NULL
    Core Count: 64
    Core Enabled: 64
    Thread Count: 64
    Characteristics:
        64-bit capable
        Multi-Core
        Hardware Thread
        Execute Protection
        Enhanced Virtualization
        Power/Performance Control

申威3231

申威系列微处理器的开发主要是被中华人民共和国用于军事方面[来源请求]。根据部分公开信息表明，此系列的微体系架构基于DEC Alpha派生而来。[1][2]而SW-3/SW1600处理器则是基于Alpha 21164。[3]

不过申威系列最新的SW26010处理器，目前没有详细的信息表明它是基于DEC Alpha微架构的派生品。[4][5]不过处理器的处理器核心结构布局，则是类似于基于POWER指令集架构的Cell微架构)。

申威 3231处理器是基于第三代“申威 64” 二次优化版核心（C3B）的国产高性能多核处理器。3231的内核与1621属于同一代，采用新一代工艺，最高主频2.5Ghz，32核心，3231基本上可以视为1621换工艺后的32核版本，主要面向高性能计算和高端服务器应用。

申威 3231采用“申威64”自主指令系统；

基于第三代“申威 64”二次优化版核心（C3B）的32核64位通用处理器;

采用CC-NUMA多核结构和SoC技术，片内包含8路DDR4存储控制器接口以及40lane的PCI-E 4.0标准I/O接口；

集成3路直连接口，可构建2路或4路服务器系统；

计算性能：双精度浮点性能可达1280GFlops，整数性能可达880Gops；

访存性能：最大传输率为3200Mbps，最大总存储器容量2TB；

I/O性能：双向聚合有效带宽可达到160GB/s，支持I/O虚拟化。

img

3232推出的时间会比3231迟一些，采用新一代CPU核，IPC会非常惊人，保底10/G，争取12/G，考虑倒申威团队一向严谨，以及过去基本没有让大家失望过，因而对3232的IPC，可以采用就高原则。

申威 3231架构

image.png

申威 6B 芯片结构的主要特点如下：

  • 全芯片集成 32 个物理核心，每个物理核心支持 1 个线程，软件可见 32 个逻辑核心；

  • 每个物理核心集成 32KB L1 指令 Cache（ICache）、32KB L1 数据 Cache（DCache）和 512KB 的 L2 Cache（SCache），核心内的所有 Cache 为核心私有 Cache；

  • 全芯片集成 64MB 的 L3 Cache（TCache），本芯片内所有核心分布共享，TCache 由16 个体组成，每个体跟2 个物理核心及其对应的管理部件（LCPM）一起组成一个核组，连接在环网节点上，核心访问不同 TCache 体中的副本延迟略有不同；

  • 存储器接口：全芯片集成 8 个 DDR4 存储器通道，每个通道数据宽度为 72bit（含 8 位 ECC），支持 UDIMM、RDIMM 和 LRDIMM，单通道内存容量最大支持 256GB 容量，单通道带宽可达 25.6GB/s（DDR4-3200）；每4 个存储器通道对应一个主存代理部件（GCPM），所有核心和 IO 设备都可访问；

  • PCIe 接口：全芯片集成 40 Lane 的 PCIe 4.0 链路，支持 x4、x8 和 x16 灵活配置，最大支持 6 个 RC；

  • 直连接口：全芯片集成 3 路直连接口，可构建 2 路或 4 路服务器系统，每路直连接口为9 个lane的serdes 接口，接口速率为28Gbps；

  • 维护调试测试接口：维护控制部件实现芯片配置、初始引导以及提供各种维护和调试支持。维护控制部件支持芯片的上电初始化、配置加载、存储器读写或 IO 读写、维护中断以及内部状态的扫描观测等。支持外部维护通过 Jtag 接口进行初始引导；支持通过 SPI Master 接口从 SPI Flash中进行自举引导；

  • 集成三套 I2C 接口、一套 Uart、GPIO 和 LPC 低速接口。

申威1621处理器是基于第三代“申威64”核心（增强版）的国产高性能多核处理器，主要面向高性能计算和中高端服务器应用。目前，该处理器已经实现量产。

img 申威1621采用对称多核结构和SoC技术，单芯片集成了16个64位RISC结构的申威处理器核心，目标设计主频为2GHz。芯片还集成八路DDR3存储控制器和双路PCI-E3.0标准I/O接口。

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#dmidecode -t processor
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
# SMBIOS implementations newer than version 3.0 are not
# fully supported by this version of dmidecode.
Handle 0x0022, DMI type 4, 48 bytes
Processor Information
        Socket Designation: CPU 0
        Type: Central Processor
        Family: Other
        Manufacturer: SW3231
        ID: 28 00 C8 80 01 00 00 00
        Version: Product
        Voltage: 3.3 V
        External Clock: 200 MHz
        Max Speed: 2400 MHz
        Current Speed: 2400 MHz
        Status: Unpopulated
        Upgrade: Other
        L1 Cache Handle: 0x2000
        L2 Cache Handle: 0x2002
        L3 Cache Handle: 0x2003
        Serial Number: .......
        Asset Tag: Asset Tag#To Be Filled By O.E.M.
        Part Number: Part Number#To Be Filled By O.E.M.
        Core Count: 32
        Core Enabled: 32
        Thread Count: 0
        Characteristics:
                64-bit capable
Handle 0x0023, DMI type 4, 48 bytes
Processor Information
        Socket Designation: CPU 1
        Type: Central Processor
        Family: Other
        Manufacturer: SW3231
        ID: 28 00 C8 80 01 00 00 00
        Version: Product
        Voltage: 3.3 V
        External Clock: 200 MHz
        Max Speed: 2400 MHz
        Current Speed: 2400 MHz
        Status: Unpopulated
        Upgrade: Other
        L1 Cache Handle: 0x2000
        L2 Cache Handle: 0x2002
        L3 Cache Handle: 0x2003
        Serial Number: .......
        Asset Tag: Asset Tag#To Be Filled By O.E.M.
        Part Number: Part Number#To Be Filled By O.E.M.
        Core Count: 32
        Core Enabled: 32
        Thread Count: 0
        Characteristics:
                64-bit capable
[root@d22b04001.cloud.b04.amtest11 /root] 193E_OPS1
#numactl -H
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
node 0 size: 259482 MB
node 0 free: 121171 MB
node 1 cpus: 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
node 1 size: 260091 MB
node 1 free: 88564 MB
node distances:
node   0   1
  0:  10  20
  1:  20  10
#lscpu
Architecture:          sw_64
CPU op-mode(s):        64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    1
Core(s) per socket:    32
Socket(s):             2
NUMA node(s):          2
Vendor ID:             sw
CPU family:            6
Model:                 6
Model name:            sw
CPU MHz:               2400.00
BogoMIPS:              4800.00
NUMA node0 CPU(s):     0-31
NUMA node1 CPU(s):     32-63

openssl speed aes-256-ige性能比较

测试脚本

openssl speed aes-256-ige -multi 1

单核能力

Intel (52物理core) aes-256 ige 89602.86k 97498.37k 98271.49k 98399.91k 89101.65k
海光（32物理core） aes-256 ige 76919.66k 77935.81k 79201.88k 79529.30k 79555.24k
鲲鹏920（96物理core) aes-256 ige 133174.89k 140578.99k 142156.46k 142663.34k 143196.16k

测试32个线程并行

Intel (52物理core) aes-256 ige 2642742.25k 2690638.98k 2703860.74k 2734114.82k 2680422.40
海光（32物理core） aes-256 ige 2464568.75k 2499381.80k 2528665.34k 2544845.14k 2550723.93k
鲲鹏920（96物理core) aes-256 ige 4261589.92k 4501245.55k 4552731.56k 4570456.75k 4584330.58k

将所有核跑满包括HT

Intel (52物理core) aes-256 ige 4869950.82k 5179884.71k 5135412.14k 5211367.08k 5247858.60k
海光（32物理core） aes-256 ige 2730195.74k 2836759.53k 2865252.35k 2857900.71k 2884302.17k
鲲鹏920（96物理core) aes-256 ige 12788358.79k 13502288.53k 13657385.98k 13710908.76k 13751432.53k

单核计算 7^999999” 的性能对比

测试命令：bash -c ‘echo “7^999999” | bc > /dev/null’

执行时间(秒) IPC 主频
海光 26.729972414 0.92 2.5G
鲲鹏920 24.604603640 1.84 2.6G
飞腾2500 39.654819568 0.43 2.1G
Intel 18.603323495 2.19 2.5G

当然也可以通过计算pi值来测试

bash -c ‘ echo “scale=5000; 4*a(1)” | bc -l -q >/dev/null ‘

多核一起跑的话可以这样:

for i in {0..95}; do time echo “scale=5000; 4*a(1)” | bc -l -q >/dev/null & done

perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads –

intel

耗时18.60秒，ipc 2.19

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# sudo perf stat -e branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,ref-cycles,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-stores,L1-icache-load-misses,LLC-load-misses,LLC-loads,LLC-store-misses,LLC-stores,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,dTLB-store-misses,dTLB-stores,iTLB-load-misses,iTLB-loads,node-load-misses,node-loads,node-store-misses,node-stores -- bash -c 'echo "7^999999" | bc > /dev/null'
 Performance counter stats for 'bash -c echo "7^999999" | bc > /dev/null':
    25,130,886,211      branch-instructions                                           (10.72%)
     1,200,086,175      branch-misses             #    4.78% of all branches          (14.29%)
       460,824,074      bus-cycles                                                    (14.29%)
         1,983,459      cache-misses              #   46.066 % of all cache refs      (14.30%)
         4,305,730      cache-references                                              (14.30%)
    58,626,314,801      cpu-cycles                                                    (17.87%)
   128,284,870,917      instructions              #    2.19  insn per cycle           (21.45%)
    46,040,656,499      ref-cycles                                                    (25.02%)
        22,821,794      L1-dcache-load-misses     #    0.10% of all L1-dcache hits    (25.02%)
    23,041,732,649      L1-dcache-loads                                               (25.01%)
     5,386,243,625      L1-dcache-stores                                              (25.00%)
        12,443,154      L1-icache-load-misses                                         (25.00%)
           178,790      LLC-load-misses           #   30.52% of all LL-cache hits     (14.28%)
           585,724      LLC-loads                                                     (14.28%)
           469,381      LLC-store-misses                                              (7.14%)
           664,865      LLC-stores                                                    (7.14%)
     1,201,547,113      branch-load-misses                                            (10.71%)
    25,139,625,428      branch-loads                                                  (14.28%)
            63,334      dTLB-load-misses          #    0.00% of all dTLB cache hits   (14.28%)
    23,023,969,089      dTLB-loads                                                    (14.28%)
            17,355      dTLB-store-misses                                             (14.28%)
     5,378,496,562      dTLB-stores                                                   (14.28%)
           341,119      iTLB-load-misses          #  119.92% of all iTLB cache hits   (14.28%)
           284,445      iTLB-loads                                                    (14.28%)
           151,608      node-load-misses                                              (14.28%)
            37,553      node-loads                                                    (14.29%)
           434,537      node-store-misses                                             (7.14%)
            65,709      node-stores                                                   (7.14%)
      18.603323495 seconds time elapsed
      18.525904000 seconds user
       0.015197000 seconds sys

鲲鹏920

耗时24.6秒, IPC 1.84

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#perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads -- bash -c 'echo "7^999999" | bc > /dev/null'
 Performance counter stats for 'bash -c echo "7^999999" | bc > /dev/null':
     1,467,769,425      branch-misses                                                 (59.94%)
    63,866,536,853      bus-cycles                                                    (59.94%)
         6,571,273      cache-misses              #    0.021 % of all cache refs      (59.94%)
    30,768,754,927      cache-references                                              (59.96%)
    63,865,354,560      cpu-cycles                                                    (64.97%)
   117,790,453,518      instructions              #    1.84  insns per cycle
                                                  #    0.07  stalled cycles per insn  (64.98%)
       833,090,930      stalled-cycles-backend    #    1.30% backend  cycles idle     (65.00%)
     7,918,227,782      stalled-cycles-frontend   #   12.40% frontend cycles idle     (65.01%)
         6,962,902      L1-dcache-load-misses     #    0.02% of all L1-dcache hits    (65.03%)
    30,804,266,645      L1-dcache-loads                                               (65.05%)
         6,960,157      L1-dcache-store-misses                                        (65.06%)
    30,807,954,068      L1-dcache-stores                                              (65.06%)
         1,012,171      L1-icache-load-misses                                         (65.06%)
    45,256,066,296      L1-icache-loads                                               (65.04%)
     1,470,467,198      branch-load-misses                                            (65.03%)
    27,108,794,972      branch-loads                                                  (65.01%)
           475,707      dTLB-load-misses          #    0.00% of all dTLB cache hits   (65.00%)
    35,159,826,836      dTLB-loads                                                    (59.97%)
               912      iTLB-load-misses          #    0.00% of all iTLB cache hits   (59.96%)
    45,325,885,822      iTLB-loads                                                    (59.94%)
      24.604603640 seconds time elapsed

海光

耗时 26.73秒, IPC 0.92

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sudo perf stat -e branch-instructions,branch-misses,cache-references,cpu-cycles,instructions,stalled-cycles-backend,stalled-cycles-frontend,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-prefetches,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,iTLB-load-misses,iTLB-loads -a -- bash -c 'echo "7^999999" | bc > /dev/null'
 Performance counter stats for 'system wide':
    57,795,675,025      branch-instructions                                           (27.78%)
     2,459,509,459      branch-misses             #    4.26% of all branches          (27.78%)
    12,171,133,272      cache-references                                              (27.79%)
   317,353,262,523      cpu-cycles                                                    (27.79%)
   293,162,940,548      instructions              #    0.92  insn per cycle
                                                  #    0.19  stalled cycles per insn  (27.79%)
    55,152,807,029      stalled-cycles-backend    #   17.38% backend cycles idle      (27.79%)
    44,410,732,991      stalled-cycles-frontend   #   13.99% frontend cycles idle     (27.79%)
     4,065,273,083      L1-dcache-load-misses     #    3.58% of all L1-dcache hits    (27.79%)
   113,699,208,151      L1-dcache-loads                                               (27.79%)
     1,351,513,191      L1-dcache-prefetches                                          (27.79%)
     2,091,035,340      L1-icache-load-misses     #    4.43% of all L1-icache hits    (27.79%)
    47,240,289,316      L1-icache-loads                                               (27.79%)
     2,459,838,728      branch-load-misses                                            (27.79%)
    57,855,156,991      branch-loads                                                  (27.78%)
        69,731,473      dTLB-load-misses          #   20.40% of all dTLB cache hits   (27.78%)
       341,773,319      dTLB-loads                                                    (27.78%)
        26,351,132      iTLB-load-misses          #   15.91% of all iTLB cache hits   (27.78%)
       165,656,863      iTLB-loads                                                    (27.78%)
      26.729972414 seconds time elapsed

飞腾

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time perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,iTLB-load-misses -a -- bash -c 'echo "7^999999" | bc > /dev/null'
 Performance counter stats for 'system wide':
        2552812813      branch-misses                                                 (38.08%)
      602038279874      bus-cycles                                                    (37.54%)
        1742826523      cache-misses              #    2.017 % of all cache refs      (37.54%)
       86400294181      cache-references                                              (37.55%)
      612467194375      cpu-cycles                                                    (43.79%)
      263691445872      instructions              #    0.43  insns per cycle          (43.79%)
        1706247569      L1-dcache-load-misses     #    2.00% of all L1-dcache hits    (43.78%)
       85122454139      L1-dcache-loads                                               (43.77%)
        1711243358      L1-dcache-store-misses                                        (39.38%)
       86288158984      L1-dcache-stores                                              (37.52%)
        2006641212      L1-icache-load-misses                                         (37.51%)
      146380907111      L1-icache-loads                                               (37.51%)
        2560208048      branch-load-misses                                            (37.52%)
       63127187342      branch-loads                                                  (41.38%)
         768494735      dTLB-load-misses                                              (43.77%)
         124424415      iTLB-load-misses                                              (43.77%)
      39.654819568 seconds time elapsed
real    0m39.763s
user    0m39.635s
sys    0m0.127s

perf 数据对比

Intel

intel的cpu随着线程的增加，ipc稳定减少，但不是线性的

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海光

如下数据可以看到在用满32个物理core之前，ipc保持稳定，超过32core后随着并发增加ipc相应减少，性能再也上不去了。

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鲲鹏920

可以看到鲲鹏920多核跑openssl是没有什么争抢的，所以还能保证完全线性

image.png

image.png

小结

intel的流水线适合跑高带宽应用，不适合跑密集计算应用，也就是intel的pipeline数量少，但是内存读写上面优化好，乱序优化好。跑纯计算，不是intel的强项。

数据库场景下鲲鹏920大概相当于X86的70%的能力

prime计算一般走的fpu，不走cpu

intel x86 cpu bound和memory bond数据

测试代码

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#include <stdlib.h>
#include <emmintrin.h>
#include <stdio.h>
#include <signal.h>
char a = 1;
void memory_bound() {
        register unsigned i=0;
        register char b;
        for (i=0;i<(1u<<24);i++) {
                // evict cacheline containing a
                 _mm_clflush(&a);
                 b = a;
        }
}
void cpu_bound() {
        register unsigned i=0;
        for (i=0;i<(1u<<31);i++) {
                __asm__ ("nop\nnop\nnop");
        }
}
int main() {
        int i=0;
          for(i=0;i<10; ++i){
                 //cpu_bound();
                 memory_bound();
          }
        return 0;
}

测试结果

cpu_bound部分飞腾只有intel性能的30%

如下测试perf数据可以看到IPC的明显差异

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# sudo perf stat -e branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,ref-cycles,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-stores,L1-icache-load-misses,LLC-load-misses,LLC-loads,LLC-store-misses,LLC-stores,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,dTLB-store-misses,dTLB-stores,iTLB-load-misses,iTLB-loads,node-load-misses,node-loads,node-store-misses,node-stores -a ./memory_bound
 Performance counter stats for 'system wide':
    36,162,872,212      branch-instructions                                           (14.21%)
       586,644,153      branch-misses             #    1.62% of all branches          (12.95%)
     4,632,787,085      bus-cycles                                                    (14.40%)
       476,189,785      cache-misses              #   17.714 % of all cache refs      (14.38%)
     2,688,284,129      cache-references                                              (14.35%)
   258,946,713,506      cpu-cycles                                                    (17.93%)
   181,069,328,200      instructions              #    0.70  insn per cycle           (21.51%)
   456,889,428,341      ref-cycles                                                    (22.31%)
     3,928,434,098      L1-dcache-load-misses     #    7.46% of all L1-dcache hits    (14.21%)
    52,656,559,902      L1-dcache-loads                                               (14.31%)
    26,711,751,387      L1-dcache-stores                                              (14.30%)
     2,618,739,340      L1-icache-load-misses                                         (18.05%)
       154,326,888      LLC-load-misses           #    8.60% of all LL-cache hits     (19.84%)
     1,795,112,198      LLC-loads                                                     (9.81%)
        66,802,375      LLC-store-misses                                              (10.19%)
       206,810,811      LLC-stores                                                    (11.16%)
       586,120,789      branch-load-misses                                            (14.28%)
    36,121,237,395      branch-loads                                                  (14.29%)
       114,927,298      dTLB-load-misses          #    0.22% of all dTLB cache hits   (14.29%)
    52,902,163,128      dTLB-loads                                                    (14.29%)
         7,010,297      dTLB-store-misses                                             (14.29%)
    26,587,353,417      dTLB-stores                                                   (18.00%)
       106,209,281      iTLB-load-misses          #  174.17% of all iTLB cache hits   (19.33%)
        60,978,626      iTLB-loads                                                    (21.53%)
       117,197,042      node-load-misses                                              (19.71%)
        35,764,508      node-loads                                                    (11.65%)
        57,655,994      node-store-misses                                             (7.80%)
        11,563,328      node-stores                                                   (9.45%)
      16.700731355 seconds time elapsed
# sudo perf stat -e branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,ref-cycles,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-stores,L1-icache-load-misses,LLC-load-misses,LLC-loads,LLC-store-misses,LLC-stores,branch-load-misses,branch-loads,dTLB-load-misses,dTLB-loads,dTLB-store-misses,dTLB-stores,iTLB-load-misses,iTLB-loads,node-load-misses,node-loads,node-store-misses,node-stores -a ./cpu_bound
 Performance counter stats for 'system wide':
    43,013,055,562      branch-instructions                                           (14.33%)
       436,722,063      branch-misses             #    1.02% of all branches          (11.58%)
     3,154,327,457      bus-cycles                                                    (14.31%)
       306,977,772      cache-misses              #   17.837 % of all cache refs      (14.42%)
     1,721,062,233      cache-references                                              (14.39%)
   176,119,834,487      cpu-cycles                                                    (17.98%)
   276,038,539,571      instructions              #    1.57  insn per cycle           (21.55%)
   309,334,354,268      ref-cycles                                                    (22.31%)
     2,551,915,790      L1-dcache-load-misses     #    6.78% of all L1-dcache hits    (13.12%)
    37,638,319,334      L1-dcache-loads                                               (14.32%)
    19,132,537,445      L1-dcache-stores                                              (15.73%)
     1,834,976,400      L1-icache-load-misses                                         (18.90%)
       131,307,343      LLC-load-misses           #   11.46% of all LL-cache hits     (19.94%)
     1,145,964,874      LLC-loads                                                     (16.60%)
        45,561,247      LLC-store-misses                                              (8.11%)
       140,236,535      LLC-stores                                                    (9.60%)
       423,294,349      branch-load-misses                                            (14.27%)
    46,645,623,485      branch-loads                                                  (14.28%)
        73,377,533      dTLB-load-misses          #    0.19% of all dTLB cache hits   (14.28%)
    37,905,428,246      dTLB-loads                                                    (15.69%)
         4,969,973      dTLB-store-misses                                             (17.21%)
    18,729,947,580      dTLB-stores                                                   (19.71%)
        72,073,313      iTLB-load-misses          #  167.86% of all iTLB cache hits   (20.60%)
        42,935,532      iTLB-loads                                                    (19.16%)
       112,306,453      node-load-misses                                              (15.35%)
        37,239,267      node-loads                                                    (7.44%)
        37,455,335      node-store-misses                                             (10.00%)
         8,134,155      node-stores                                                   (8.87%)
      10.838808208 seconds time elapsed

飞腾

ipc 大概是intel的30%，加上主频也要差一些，

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#time perf stat -e branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,L1-dcache-load-misses,L1-dcache-loads,L1-dcache-store-misses,L1-dcache-stores,L1-icache-load-misses,L1-icache-loads,branch-load-misses,branch-loads,dTLB-load-misses,iTLB-load-misses -a ./cpu_bound
 Performance counter stats for 'system wide':
       10496356859      branch-misses                                                 (37.60%)
     2813170983911      bus-cycles                                                    (37.58%)
       17604745519      cache-misses              #    3.638 % of all cache refs      (37.55%)
      483878256161      cache-references                                              (37.54%)
     2818545529083      cpu-cycles                                                    (43.78%)
     1280497827941      instructions              #    0.45  insns per cycle          (43.78%)
       17623592806      L1-dcache-load-misses     #    3.65% of all L1-dcache hits    (43.78%)
      482429613337      L1-dcache-loads                                               (41.83%)
       17604561232      L1-dcache-store-misses                                        (37.53%)
      484126081882      L1-dcache-stores                                              (37.52%)
       17774514325      L1-icache-load-misses                                         (37.50%)
      641046300400      L1-icache-loads                                               (37.50%)
       10574973722      branch-load-misses                                            (39.45%)
      273851009656      branch-loads                                                  (43.76%)
        9457594390      dTLB-load-misses                                              (43.77%)
        1813954093      iTLB-load-misses                                              (43.77%)
      31.172754504 seconds time elapsed
real    0m31.284s
user    0m31.096s
sys    0m0.165s

unixBench 5.1.3 性能对比

测试命令： ./Run -c 1 -c 4

芯片 架构 逻辑核数 单核能力 4核能力 单核比值 4核比值 整机对比
Intel 4114 x86 40 1150 3095 100% 100% 100%
海光 7165 x86 48 1586 2533 138% 82% 98%
华为鲲鹏920 arm 96 1168 2066 102% 67% 160%
飞腾2000 arm 64 731 1902 64% 61% 98%
申威1621 alpha 16 445 1065 39% 34% 14%

以上CPU除了Intel，其它都没有HT，也就是Intel 4114实际是20个物理核。以上数据来自ata，仅供参考

ARM 和 X86的总结

对比硬件：

ARM：泰山ARM 双路 128核心64核心/路），2.5G，4指令/周期，8个内存通道/路，mips体系架构。
X86: intel 8163服务器 双路 48核心（24核心/路），2.5GHZ， 6指令/周期，96smt， 6个内存通道

用 Geabase(C++) 测试所得 ARM是X86 性能的1.36倍，接近理论值的1.4倍

理论值的计算公式：

CPU性能验证公式：频率 x 核数 x 发射数/周期 x 1.3/1.5(smt2/smt4) (smt是指超线程数量)

ARM 优势的来源主要是工艺领先一代(7nm VS 14nm)

总结

  • 对纯CPU 运算场景，并发不超过物理core时，比如Prime运算，比如DRDS(CPU bound，IO在网络，可以加并发弥补)
    • 海光的IPC能保持稳定；
    • intel的IPC有所下降，但是QPS在IPC下降后还能完美线性
  • 在openssl和MySQL oltp_read_only场景下
    • 如果并发没超过物理core数时，海光和Intel都能随着并发的翻倍性能能增加80%
    • 如果并发超过物理core数后，Intel还能随着并发的翻倍性能增加50%，海光增加就只有20%了
    • 简单理解在这两个场景下Intel的HT能发挥半个物理core的作用，海光的HT就只能发挥0.2个物理core的作用了
  • 海光zen1的AMD 架构，每个core只有一个fpu，综上在多个场景下HT基本上都可以忽略
  • 飞腾2500性能比较差
  • 国产CPU：飞腾、鲲鹏、龙芯、申威、海光(AMD授权)、兆芯(威盛via 授权x86)
  • CPU性能验证公式：频率 x 核数 x 发射数/周期 x 1.3/1.5(smt2/smt4) (smt是指超线程数量)
  • 大吞吐量计算由多核CPU数量决定，多核CPU数量由制程工艺决定，制程工艺由资本决定，制程工艺资本由主流消费电子决定, 摩尔定律仍在持续

系列文章

CPU的制造和概念

CPU 性能和Cache Line

Perf IPC以及CPU性能

Intel、海光、鲲鹏920、飞腾2500 CPU性能对比

飞腾ARM芯片(FT2500)的性能测试的性能测试/)

十年后数据库还是不敢拥抱NUMA？

一次海光物理机资源竞争压测的记录

Intel PAUSE指令变化是如何影响自旋锁以及MySQL的性能的

参考资料

Intel PAUSE指令变化是如何影响自旋锁以及MySQL的性能的

华为TaiShan服务器ARMNginx应用调优案例 大量绑核、中断、Numa等相关调优信息