Testing a cryptographic library. The test is single-threaded and runs quickly.
Topdown profile has sparse output but some sections with higher backend stalls.
AMD metrics suggest more cpu-stalls than memory stalls.
elapsed 94.220
on_cpu 0.017 # 0.27 / 16 cores
utime 24.435
stime 0.831
nvcsw 1618 # 84.71%
nivcsw 292 # 15.29%
inblock 0 # 0.00/sec
onblock 14016 # 148.76/sec
cpu-clock 25298928290 # 25.299 seconds
task-clock 25302154587 # 25.302 seconds
page faults 149643 # 5914.239/sec
context switches 2182 # 86.238/sec
cpu migrations 223 # 8.813/sec
major page faults 2 # 0.079/sec
minor page faults 149641 # 5914.160/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 12740465932 # 43.051 branches per 1000 inst
branch misses 86402205 # 0.68% branch miss
conditional 9430797976 # 31.867 conditional branches per 1000 inst
indirect 794097045 # 2.683 indirect branches per 1000 inst
cpu-cycles 99053264199 # 0.07 GHz
instructions 293958110541 # 2.97 IPC
slots 201017705694 #
retiring 107853876305 # 53.7% (53.7%)
-- ucode 2437762483 # 1.2%
-- fastpath 105416113822 # 52.4%
frontend 12455300921 # 6.2% ( 6.2%)
-- latency 4433151924 # 2.2%
-- bandwidth 8022148997 # 4.0%
backend 80056377689 # 39.8% (39.8%)
-- cpu 66843608534 # 33.3%
-- memory 13212769155 # 6.6%
speculation 642511928 # 0.3% ( 0.3%) low
-- branch mispredict 635813643 # 0.3%
-- pipeline restart 6698285 # 0.0%
smt-contention 9414965 # 0.0% ( 0.0%)
cpu-cycles 99031464468 # 0.07 GHz
instructions 294049097735 # 2.97 IPC
instructions 98761582757 # 1.350 l2 access per 1000 inst
l2 hit from l1 114558171 # 17.55% l2 miss
l2 miss from l1 13343998 #
l2 hit from l2 pf 8732172 #
l3 hit from l2 pf 4360538 #
l3 miss from l2 pf 5701902 #
instructions 98703762781 # 465.071 float per 1000 inst
float 512 59 # 0.000 AVX-512 per 1000 inst
float 256 434 # 0.000 AVX-256 per 1000 inst
float 128 45904276555 # 465.071 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
instructions 295851927697 #
opcache 24579101623 # 83.079 opcache per 1000 inst
opcache miss 607511905 # 2.5% opcache miss rate
l1 dTLB miss 26086132 # 0.088 L1 dTLB per 1000 inst
l2 dTLB miss 4936000 # 0.017 L2 dTLB per 1000 inst
instructions 295862657534 #
icache 1326635578 # 4.484 icache per 1000 inst
icache miss 169783857 # 12.8% icache miss rate
l1 iTLB miss 9336024 # 0.032 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 17842 # 0.000 TLB flush per 1000 inst
Intel metrics confirm floating point code with little l2 access.
elapsed 93.642
on_cpu 0.017 # 0.27 / 16 cores
utime 24.866
stime 0.434
nvcsw 1478 # 87.61%
nivcsw 209 # 12.39%
inblock 16 # 0.17/sec
onblock 2736 # 29.22/sec
cpu-clock 25324784526 # 25.325 seconds
task-clock 25328463591 # 25.328 seconds
page faults 136213 # 5377.863/sec
context switches 1965 # 77.581/sec
cpu migrations 272 # 10.739/sec
major page faults 0 # 0.000/sec
minor page faults 136213 # 5377.863/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 13320342900 # 42.997 branches per 1000 inst
branch misses 29709033 # 0.22% branch miss
conditional 13320354356 # 42.997 conditional branches per 1000 inst
indirect 957564149 # 3.091 indirect branches per 1000 inst
slots 568223492150 #
retiring 310611767324 # 54.7% (54.7%) high
-- ucode 8196156117 # 1.4%
-- fastpath 302415611207 # 53.2%
frontend 23950086249 # 4.2% ( 4.2%) low
-- latency 5362441166 # 0.9%
-- bandwidth 18587645083 # 3.3%
backend 230251712207 # 40.5% (40.5%)
-- cpu 212720773829 # 37.4%
-- memory 17530938378 # 3.1%
speculation 4451426739 # 0.8% ( 0.8%) low
-- branch mispredict 4284503346 # 0.8%
-- pipeline restart 166923393 # 0.0%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 94690767500 # 0.06 GHz
instructions 309962466792 # 3.27 IPC high
l2 access 255595421 # 0.825 l2 access per 1000 inst
l2 miss 80138123 # 31.35% l2 miss
cpu-cycles 94563596930 # 4.1% memory latency
load stalls 3773421162 # 3.3% l1 bound
l1 miss 637484752 # 0.4% l2 bound
l2 miss 292673964 # 0.1% l3 bound
l3 miss 193375032 # 0.2% dram bound
store_stalls 76788507 # 0.1% store bound
Process overview shows benchmark overhead nearly as high as the nettle-benchmark process.
360 processes
12 nettle-benchmar 23.32 0.00
68 clinfo 19.76 6.66
38 vulkaninfo 1.86 1.14
4 vulkani:disk$0 0.19 0.12
2 llvmpipe-0 0.10 0.06
2 llvmpipe-1 0.10 0.06
2 llvmpipe-10 0.10 0.06
2 llvmpipe-11 0.10 0.06
2 llvmpipe-12 0.10 0.06
2 llvmpipe-13 0.10 0.06
2 llvmpipe-14 0.10 0.06
2 llvmpipe-15 0.10 0.06
2 llvmpipe-2 0.10 0.06
2 llvmpipe-3 0.10 0.06
2 llvmpipe-4 0.10 0.06
2 llvmpipe-5 0.10 0.06
2 llvmpipe-6 0.10 0.06
2 llvmpipe-7 0.10 0.06
2 llvmpipe-8 0.10 0.06
2 llvmpipe-9 0.10 0.06
6 php 0.07 0.12
6 clang 0.05 0.07
3 rocminfo 0.00 0.03
1 lspci 0.00 0.03
89 sh 0.00 0.00
14 gsettings 0.00 0.00
13 gcc 0.00 0.00
12 nettle 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
4 glxinfo 0.00 0.00
2 cc 0.00 0.00
2 lscpu 0.00 0.00
2 setterm 0.00 0.00
2 uname 0.00 0.00
2 which 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 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
0 processes running
47 maximum processes
Computation blocks
1025300) nettle cpu=8 start=5.52 finish=9.66
1025301) nettle-benchmar cpu=15 start=5.53 finish=9.65
1025302) nettle cpu=4 start=13.66 finish=17.81
1025303) nettle-benchmar cpu=13 start=13.66 finish=17.81
1025304) nettle cpu=11 start=21.82 finish=25.97
1025305) nettle-benchmar cpu=12 start=21.82 finish=25.97
1025306) sh cpu=11 start=25.97 finish=25.97
1025307) sh cpu=12 start=25.97 finish=25.97
1025309) nettle cpu=3 start=36.17 finish=37.55
1025310) nettle-benchmar cpu=4 start=36.17 finish=37.55
1025311) nettle cpu=3 start=41.56 finish=42.92
1025312) nettle-benchmar cpu=4 start=41.56 finish=42.92
1025313) nettle cpu=3 start=46.93 finish=48.29
1025314) nettle-benchmar cpu=12 start=46.93 finish=48.29
1025315) sh cpu=3 start=48.29 finish=48.29
1025316) sh cpu=12 start=48.29 finish=48.29
1025317) nettle cpu=3 start=58.48 finish=60.51
1025318) nettle-benchmar cpu=12 start=58.49 finish=60.51
1025319) nettle cpu=11 start=64.51 finish=66.51
1025320) nettle-benchmar cpu=12 start=64.52 finish=66.51
1025321) nettle cpu=11 start=70.52 finish=72.52
1025322) nettle-benchmar cpu=12 start=70.52 finish=72.52
1025323) sh cpu=11 start=72.52 finish=72.52
1025324) sh cpu=12 start=72.52 finish=72.52
1025325) nettle cpu=3 start=82.71 finish=83.00
1025326) nettle-benchmar cpu=5 start=82.71 finish=83.00
1025327) nettle cpu=3 start=87.00 finish=87.29
1025328) nettle-benchmar cpu=4 start=87.00 finish=87.29
1025329) nettle cpu=3 start=91.29 finish=91.58
1025330) nettle-benchmar cpu=12 start=91.30 finish=91.58