LeelaChessZero is a chess program automated via neural networks. There are three backends: BLAS, Eigen and OpenCL. The OpenCL backend didn’t run because OpenCL wasn’t configured. The BLAS implementation is much faster on my AMD CPU than my Intel CPU. Th e profile shows a lot of variation in runnable processes.I expect we will see many short processes running.
Frontend stalls periodically spike up and retirement rate is in mid 30s.
AMD metrics show a lot of context switches and page faults. Waiting on both CPU and memory.
elapsed 2286.628
on_cpu 0.788 # 12.61 / 16 cores
utime 28433.206
stime 398.719
nvcsw 3234284 # 4.57%
nivcsw 67581710 # 95.43%
inblock 0 # 0.00/sec
onblock 28176 # 12.32/sec
cpu-clock 28817910710262 # 28817.911 seconds
task-clock 28822250831254 # 28822.251 seconds
page faults 13958000 # 484.279/sec
context switches 70827221 # 2457.380/sec
cpu migrations 638731 # 22.161/sec
major page faults 6 # 0.000/sec
minor page faults 13957994 # 484.278/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 6068063340836 # 48.790 branches per 1000 inst
branch misses 161506622845 # 2.66% branch miss
conditional 4022477007429 # 32.343 conditional branches per 1000 inst
indirect 635544091025 # 5.110 indirect branches per 1000 inst
cpu-cycles 127880209993342 # 3.00 GHz
instructions 136039223127335 # 1.06 IPC
slots 255788277627072 #
retiring 46024278712982 # 18.0% (23.6%)
-- ucode 148061056873 # 0.1%
-- fastpath 45876217656109 # 17.9%
frontend 16172927052638 # 6.3% ( 8.3%)
-- latency 8743803494448 # 3.4%
-- bandwidth 7429123558190 # 2.9%
backend 128450684661770 # 50.2% (66.0%)
-- cpu 72082918052603 # 28.2%
-- memory 56367766609167 # 22.0%
speculation 4004300785800 # 1.6% ( 2.1%)
-- branch mispredict 3950326280615 # 1.5%
-- pipeline restart 53974505185 # 0.0%
smt-contention 61135597919753 # 23.9% ( 0.0%)
cpu-cycles 109299872593817 # 2.99 GHz
instructions 123409306628789 # 1.13 IPC
instructions 41152895861252 # 95.467 l2 access per 1000 inst
l2 hit from l1 2977220324102 # 7.87% l2 miss
l2 miss from l1 82623493543 #
l2 hit from l2 pf 725059870544 #
l3 hit from l2 pf 106665422650 #
l3 miss from l2 pf 119803286779 #
instructions 41153957789364 # 89.041 float per 1000 inst
float 512 85 # 0.000 AVX-512 per 1000 inst
float 256 11641 # 0.000 AVX-256 per 1000 inst
float 128 3664377273313 # 89.041 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
Intel metrics.
elapsed 4689.232
on_cpu 0.669 # 10.71 / 16 cores
utime 49944.869
stime 265.709
nvcsw 10542389 # 27.33%
nivcsw 28035944 # 72.67%
inblock 88096 # 18.79/sec
onblock 4136 # 0.88/sec
cpu-clock 50157070996008 # 50157.071 seconds
task-clock 50166215178468 # 50166.215 seconds
page faults 27500955 # 548.197/sec
context switches 38601556 # 769.473/sec
cpu migrations 2041465 # 40.694/sec
major page faults 46 # 0.001/sec
minor page faults 27500909 # 548.196/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 6812057398539 # 21.566 branches per 1000 inst
branch misses 149765412660 # 2.20% branch miss
conditional 6812058478571 # 21.566 conditional branches per 1000 inst
indirect 2202417120955 # 6.973 indirect branches per 1000 inst
slots 306536509111490 #
retiring 140232905670943 # 45.7% (45.7%)
-- ucode 2752895743197 # 0.9%
-- fastpath 137480009927746 # 44.8%
frontend 34306137327121 # 11.2% (11.2%)
-- latency 26258728548842 # 8.6%
-- bandwidth 8047408778279 # 2.6%
backend 118976275623436 # 38.8% (38.8%)
-- cpu 58208559972379 # 19.0%
-- memory 60767715651057 # 19.8%
speculation 13128862043712 # 4.3% ( 4.3%)
-- branch mispredict 13020891939040 # 4.2%
-- pipeline restart 107970104672 # 0.0%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 136668286409257 # 1.86 GHz
instructions 242039315669235 # 1.77 IPC
l2 access 6583853889433 # 46.933 l2 access per 1000 inst
l2 miss 1277645992049 # 19.41% l2 miss
Process overview as expected a large number of processes and at times many runnable processes so this benchmark is a good test of process creation for short-lived processes.
17100 processes
16675 lc0 41020472.95 418368.36
136 clinfo 37.67 14.71
38 vulkaninfo 1.14 1.52
6 php 0.21 0.38
6 glxinfo:gdrv0 0.16 0.10
4 vulkani:disk$0 0.12 0.16
2 glxinfo 0.08 0.04
2 glxinfo:cs0 0.08 0.04
2 glxinfo:disk$0 0.08 0.04
2 glxinfo:sh0 0.08 0.04
2 glxinfo:shlo0 0.08 0.04
2 llvmpipe-0 0.06 0.08
2 llvmpipe-1 0.06 0.08
2 llvmpipe-10 0.06 0.08
2 llvmpipe-11 0.06 0.08
2 llvmpipe-12 0.06 0.08
2 llvmpipe-13 0.06 0.08
2 llvmpipe-14 0.06 0.08
2 llvmpipe-15 0.06 0.08
2 llvmpipe-2 0.06 0.08
2 llvmpipe-3 0.06 0.08
2 llvmpipe-4 0.06 0.08
2 llvmpipe-5 0.06 0.08
2 llvmpipe-6 0.06 0.08
2 llvmpipe-7 0.06 0.08
2 llvmpipe-8 0.06 0.08
2 llvmpipe-9 0.06 0.08
6 clang 0.06 0.02
3 rocminfo 0.03 0.00
1 lspci 0.01 0.02
86 sh 0.00 0.00
13 gcc 0.00 0.00
12 gsettings 0.00 0.00
9 lczero 0.00 0.00
8 stat 0.00 0.00
8 systemd-detect- 0.00 0.00
6 llvm-link 0.00 0.00
5 phoronix-test-s 0.00 0.00
3 gmain 0.00 0.00
2 cc 0.00 0.00
2 lscpu 0.00 0.00
2 uname 0.00 0.00
2 which 0.00 0.00
2 xset 0.00 0.00
1 date 0.00 0.00
1 dconf worker 0.00 0.00
1 dirname 0.00 0.00
1 dmesg 0.00 0.00
1 dmidecode 0.00 0.00
1 grep 0.00 0.00
1 ifconfig 0.00 0.00
1 ip 0.00 0.00
1 lsmod 0.00 0.00
1 mktemp 0.00 0.00
1 ps 0.00 0.00
1 qdbus 0.00 0.00
1 readlink 0.00 0.00
1 realpath 0.00 0.00
1 sed 0.00 0.00
1 sort 0.00 0.00
1 stty 0.00 0.00
1 systemctl 0.00 0.00
1 template.sh 0.00 0.00
1 wc 0.00 0.00
1 xrandr 0.00 0.00
0 processes running
108 maximum processes