Testing of various hash functions. There are nine different workloads, most being tested in single-threaded mode.
Topdown shows high overall retirement with the last workloads with slightly different profile than earlier ones.
AMD metrics show a very high IPC, single thread operation, some floating point and almost no L2 access. This is a small code that mostly lives in smallest caches.
elapsed 1566.574
on_cpu 0.056 # 0.90 / 16 cores
utime 1405.196
stime 0.948
nvcsw 2257 # 29.27%
nivcsw 5453 # 70.73%
inblock 0 # 0.00/sec
onblock 15312 # 9.77/sec
cpu-clock 1406343255973 # 1406.343 seconds
task-clock 1406357969683 # 1406.358 seconds
page faults 185397 # 131.828/sec
context switches 15305 # 10.883/sec
cpu migrations 334 # 0.237/sec
major page faults 2 # 0.001/sec
minor page faults 185395 # 131.826/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 1495100183668 # 54.321 branches per 1000 inst
branch misses 2160752312 # 0.14% branch miss
conditional 1395841520622 # 50.715 conditional branches per 1000 inst
indirect 24903641088 # 0.905 indirect branches per 1000 inst
cpu-cycles 6580810789108 # 0.26 GHz
instructions 27521443521680 # 4.18 IPC
slots 13181546628816 #
retiring 9171866457372 # 69.6% (69.6%)
-- ucode 750435404 # 0.0%
-- fastpath 9171116021968 # 69.6%
frontend 221343209031 # 1.7% ( 1.7%)
-- latency 156266698086 # 1.2%
-- bandwidth 65076510945 # 0.5%
backend 3631513254290 # 27.5% (27.6%)
-- cpu 1226756271225 # 9.3%
-- memory 2404756983065 # 18.2%
speculation 155520770377 # 1.2% ( 1.2%)
-- branch mispredict 85140199853 # 0.6%
-- pipeline restart 70380570524 # 0.5%
smt-contention 1302086497 # 0.0% ( 0.0%)
cpu-cycles 6556804737849 # 0.26 GHz
instructions 27521663699112 # 4.20 IPC
instructions 9185329763862 # 0.271 l2 access per 1000 inst
l2 hit from l1 2349727250 # 2.16% l2 miss
l2 miss from l1 22158458 #
l2 hit from l2 pf 105574795 #
l3 hit from l2 pf 25325193 #
l3 miss from l2 pf 6146166 #
instructions 9173363328790 # 65.883 float per 1000 inst
float 512 90 # 0.000 AVX-512 per 1000 inst
float 256 360 # 0.000 AVX-256 per 1000 inst
float 128 604364513727 # 65.883 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 show high IPC and low GHz
elapsed 1572.995
on_cpu 0.056 # 0.90 / 16 cores
utime 1411.729
stime 0.717
nvcsw 2164 # 25.20%
nivcsw 6424 # 74.80%
inblock 2640 # 1.68/sec
onblock 3344 # 2.13/sec
cpu-clock 1412590631712 # 1412.591 seconds
task-clock 1412603168736 # 1412.603 seconds
page faults 170457 # 120.669/sec
context switches 16208 # 11.474/sec
cpu migrations 1172 # 0.830/sec
major page faults 10 # 0.007/sec
minor page faults 170447 # 120.662/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 1479471141439 # 55.404 branches per 1000 inst
branch misses 2218751241 # 0.15% branch miss
conditional 1479471155391 # 55.404 conditional branches per 1000 inst
indirect 23059444347 # 0.864 indirect branches per 1000 inst
slots 32097078581210 #
retiring 27047314342263 # 84.3% (84.3%)
-- ucode 1499727894222 # 4.7%
-- fastpath 25547586448041 # 79.6%
frontend 562755433103 # 1.8% ( 1.8%)
-- latency 129961448818 # 0.4%
-- bandwidth 432793984285 # 1.3%
backend 4061051314363 # 12.7% (12.7%)
-- cpu 3643147164965 # 11.4%
-- memory 417904149398 # 1.3%
speculation 342277606009 # 1.1% ( 1.1%)
-- branch mispredict 237716644665 # 0.7%
-- pipeline restart 104560961344 # 0.3%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 5361198145918 # 0.21 GHz
instructions 26705571755611 # 4.98 IPC
l2 access 6859086527 # 0.257 l2 access per 1000 inst
l2 miss 154700276 # 2.26% l2 miss
Process summary, looks like there is one SMhasher executable with different algorithms
412 processes
27 SMHasher 1404.18 0.00
68 clinfo 16.99 5.65
38 vulkaninfo 1.19 1.14
6 glxinfo:gdrv0 0.14 0.07
4 vulkani:disk$0 0.13 0.12
6 php 0.10 0.34
2 llvmpipe-0 0.07 0.06
2 llvmpipe-1 0.07 0.06
2 llvmpipe-10 0.07 0.06
2 llvmpipe-11 0.07 0.06
2 llvmpipe-12 0.07 0.06
2 llvmpipe-13 0.07 0.06
2 llvmpipe-14 0.07 0.06
2 llvmpipe-15 0.07 0.06
2 llvmpipe-2 0.07 0.06
2 llvmpipe-3 0.07 0.06
2 llvmpipe-4 0.07 0.06
2 llvmpipe-5 0.07 0.06
2 llvmpipe-6 0.07 0.06
2 llvmpipe-7 0.07 0.06
2 llvmpipe-8 0.07 0.06
2 llvmpipe-9 0.07 0.06
2 glxinfo 0.06 0.04
2 glxinfo:cs0 0.06 0.04
2 glxinfo:disk$0 0.06 0.03
2 glxinfo:sh0 0.06 0.03
2 glxinfo:shlo0 0.06 0.03
6 clang 0.04 0.08
1 lspci 0.01 0.02
3 rocminfo 0.01 0.00
1 ps 0.00 0.01
98 sh 0.00 0.00
27 smhasher 0.00 0.00
14 gsettings 0.00 0.00
13 gcc 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
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 gmain 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 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
47 maximum processes
Core computation block
272122) smhasher cpu=4 start=5.81 finish=10.80
272123) SMHasher cpu=6 start=5.81 finish=10.80
272126) smhasher cpu=2 start=14.81 finish=19.84
272127) SMHasher cpu=3 start=14.81 finish=19.84
272128) smhasher cpu=2 start=23.84 finish=28.85
272129) SMHasher cpu=11 start=23.84 finish=28.85
272130) sh cpu=13 start=28.85 finish=28.86
272131) sh cpu=14 start=28.85 finish=28.86
272132) smhasher cpu=2 start=39.45 finish=444.76
272133) SMHasher cpu=11 start=39.46 finish=444.76
272141) smhasher cpu=10 start=448.77 finish=854.07
272142) SMHasher cpu=11 start=448.77 finish=854.07