The helsing benchmark computes Vampire Numbers. There are two workloads: one for 12 digits and one for 14 digits with almost all the time going to the later. The second workload seems to run consistently on all cores.
Topdown profile shows frontend stalls dominating with a reasonably high retirement rate.
AMD metrics show little floating point. There is a high L2 access rate with few L2 misses.
elapsed 1544.288
on_cpu 0.977 # 15.64 / 16 cores
utime 24144.861
stime 5.900
nvcsw 2209 # 1.07%
nivcsw 203297 # 98.93%
inblock 8 # 0.01/sec
onblock 12760 # 8.26/sec
cpu-clock 24151759949628 # 24151.760 seconds
task-clock 24151872221780 # 24151.872 seconds
page faults 686457 # 28.423/sec
context switches 213041 # 8.821/sec
cpu migrations 309 # 0.013/sec
major page faults 2 # 0.000/sec
minor page faults 686455 # 28.422/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 37996374962268 # 213.248 branches per 1000 inst
branch misses 426355218797 # 1.12% branch miss
conditional 37900334306940 # 212.709 conditional branches per 1000 inst
indirect 1414195149 # 0.008 indirect branches per 1000 inst
cpu-cycles 93192585501105 # 3.76 GHz
instructions 178220525834252 # 1.91 IPC
slots 186374372514954 #
retiring 54534867291655 # 29.3% (39.7%)
-- ucode 602790653 # 0.0%
-- fastpath 54534264501002 # 29.3%
frontend 62137799188459 # 33.3% (45.2%) high
-- latency 33686540498436 # 18.1%
-- bandwidth 28451258690023 # 15.3%
backend 17152720336039 # 9.2% (12.5%) low
-- cpu 1227200586083 # 0.7%
-- memory 15925519749956 # 8.5%
speculation 3537961598501 # 1.9% ( 2.6%)
-- branch mispredict 3526283395770 # 1.9%
-- pipeline restart 11678202731 # 0.0%
smt-contention 49010830482301 # 26.3% ( 0.0%)
cpu-cycles 93281791687407 # 3.76 GHz
instructions 178199946791830 # 1.91 IPC
instructions 59402683308294 # 199.834 l2 access per 1000 inst
l2 hit from l1 6701172480876 # 0.11% l2 miss
l2 miss from l1 6682864116 #
l2 hit from l2 pf 5163093205308 #
l3 hit from l2 pf 3420115358 #
l3 miss from l2 pf 3018255728 #
instructions 59385720242127 # 1.468 float per 1000 inst
float 512 46 # 0.000 AVX-512 per 1000 inst
float 256 434 # 0.000 AVX-256 per 1000 inst
float 128 87181981843 # 1.468 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
instructions 2648516 #
opcache 975479 # 368.312 opcache per 1000 inst
opcache miss 522758 # 53.6% opcache miss rate
l1 dTLB miss 5395 # 2.037 L1 dTLB per 1000 inst
l2 dTLB miss 1159 # 0.438 L2 dTLB per 1000 inst
instructions 2722566 #
icache 1311083 # 481.562 icache per 1000 inst
icache miss 112185 # 8.6% icache miss rate
l1 iTLB miss 11 # 0.004 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 19 # 0.007 TLB flush per 1000 inst
Intel metrics
elapsed 2195.089
on_cpu 0.983 # 15.73 / 16 cores
utime 34523.529
stime 3.532
nvcsw 5708 # 2.26%
nivcsw 247340 # 97.74%
inblock 736504 # 335.52/sec
onblock 1520 # 0.69/sec
cpu-clock 34527696384921 # 34527.696 seconds
task-clock 34527759388483 # 34527.759 seconds
page faults 694041 # 20.101/sec
context switches 263807 # 7.640/sec
cpu migrations 329 # 0.010/sec
major page faults 4046 # 0.117/sec
minor page faults 689995 # 19.984/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 37995215477051 # 213.238 branches per 1000 inst
branch misses 554926384677 # 1.46% branch miss
conditional 37995215494459 # 213.238 conditional branches per 1000 inst
indirect 7321841704743 # 41.092 indirect branches per 1000 inst
slots 157759917459068 #
retiring 93941253151823 # 59.5% (59.5%) high
-- ucode 587027031054 # 0.4%
-- fastpath 93354226120769 # 59.2%
frontend 27064981185513 # 17.2% (17.2%)
-- latency 7967772793571 # 5.1%
-- bandwidth 19097208391942 # 12.1%
backend 8761522150341 # 5.6% ( 5.6%) low
-- cpu 7775846235503 # 4.9%
-- memory 985675914838 # 0.6%
speculation 28702420410020 # 18.2% (18.2%) high
-- branch mispredict 28702222069505 # 18.2%
-- pipeline restart 198340515 # 0.0%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 86412475211325 # 2.47 GHz
instructions 192985063456344 # 2.23 IPC
l2 access 7513647170631 # 63.938 l2 access per 1000 inst
l2 miss 49651416890 # 0.66% l2 miss
cpu-cycles 52549088264933 # 13.4% memory latency
load stalls 7024140040104 # 0.0% l1 bound
l1 miss 31270895567874 # 57.1% l2 bound
l2 miss 1284758476766 # 0.7% l3 bound
l3 miss 929695149808 # 1.8% dram bound
store_stalls 782090312 # 0.0% store bound
Process overview shows the helsing process taking the most time.
458 processes
108 helsing 411130.16 82.11
68 clinfo 16.22 6.64
38 vulkaninfo 1.14 1.14
6 php 0.17 0.10
6 glxinfo:gdrv0 0.13 0.07
4 vulkani:disk$0 0.12 0.12
6 glxinfo:gl0 0.12 0.06
6 clang 0.07 0.05
2 glxinfo 0.07 0.03
2 glxinfo:cs0 0.07 0.03
2 glxinfo:disk$0 0.07 0.03
2 glxinfo:sh0 0.07 0.03
2 glxinfo:shlo0 0.07 0.03
2 llvmpipe-0 0.06 0.06
2 llvmpipe-1 0.06 0.06
2 llvmpipe-10 0.06 0.06
2 llvmpipe-11 0.06 0.06
2 llvmpipe-12 0.06 0.06
2 llvmpipe-13 0.06 0.06
2 llvmpipe-14 0.06 0.06
2 llvmpipe-15 0.06 0.06
2 llvmpipe-2 0.06 0.06
2 llvmpipe-3 0.06 0.06
2 llvmpipe-4 0.06 0.06
2 llvmpipe-5 0.06 0.06
2 llvmpipe-6 0.06 0.06
2 llvmpipe-7 0.06 0.06
2 llvmpipe-8 0.06 0.06
2 llvmpipe-9 0.06 0.06
3 rocminfo 0.03 0.00
1 lspci 0.00 0.02
84 sh 0.00 0.00
13 gcc 0.00 0.00
12 gsettings 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
47 maximum processes
Computation structure is straightforward.
233808) helsing cpu=4 start=14.92 finish=20.30
233809) helsing cpu=13 start=14.93 finish=20.30
233810) helsing cpu=6 start=14.93 finish=20.23
233811) helsing cpu=15 start=14.93 finish=20.30
233812) helsing cpu=2 start=14.93 finish=20.23
233813) helsing cpu=0 start=14.93 finish=20.24
233814) helsing cpu=1 start=14.93 finish=20.20
233815) helsing cpu=3 start=14.93 finish=20.24
233816) helsing cpu=4 start=14.93 finish=20.21
233817) helsing cpu=5 start=14.93 finish=20.26
233818) helsing cpu=8 start=14.93 finish=20.29
233819) helsing cpu=7 start=14.93 finish=20.26
233820) helsing cpu=10 start=14.93 finish=20.25
233821) helsing cpu=14 start=14.93 finish=20.27
233822) helsing cpu=11 start=14.93 finish=20.23
233823) helsing cpu=9 start=14.93 finish=20.21
233824) helsing cpu=12 start=14.93 finish=20.23
233825) helsing cpu=13 start=14.93 finish=20.21