Json parsing workload with five test cases. Not much variation between the cases at this level, all single threaded.
Topdown metrics show some variation in first workload vs. other three. Otherwise a higher retirement rate limited by backend stalls.
AMD metrics show many branches though not much mispredict ratio.
elapsed 1167.221
on_cpu 0.058 # 0.93 / 16 cores
utime 947.249
stime 132.789
nvcsw 2144 # 31.39%
nivcsw 4686 # 68.61%
inblock 0 # 0.00/sec
onblock 13520 # 11.58/sec
cpu-clock 1060764404934 # 1060.764 seconds
task-clock 1043565962599 # 1043.566 seconds
page faults 4074935 # 3904.818/sec
context switches 12459 # 11.939/sec
cpu migrations 384 # 0.368/sec
major page faults 2 # 0.002/sec
minor page faults 4074933 # 3904.816/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 1623251344069 # 208.543 branches per 1000 inst
branch misses 6830289396 # 0.42% branch miss
conditional 1555765693583 # 199.873 conditional branches per 1000 inst
indirect 1109680660 # 0.143 indirect branches per 1000 inst
cpu-cycles 4597218192476 # 0.25 GHz
instructions 14599846846048 # 3.18 IPC
slots 7265075693532 #
retiring 3534025371404 # 48.6% (48.6%)
-- ucode 19825160717 # 0.3%
-- fastpath 3514200210687 # 48.4%
frontend 885850299239 # 12.2% (12.2%)
-- latency 352808287308 # 4.9%
-- bandwidth 533042011931 # 7.3%
backend 2637646765616 # 36.3% (36.3%)
-- cpu 1449201042303 # 19.9%
-- memory 1188445723313 # 16.4%
speculation 207095188915 # 2.9% ( 2.9%)
-- branch mispredict 202244588303 # 2.8%
-- pipeline restart 4850600612 # 0.1%
smt-contention 457507570 # 0.0% ( 0.0%)
cpu-cycles 4580022863126 # 0.25 GHz
instructions 14573909729059 # 3.18 IPC
instructions 3860925654216 # 48.096 l2 access per 1000 inst
l2 hit from l1 100834500364 # 32.20% l2 miss
l2 miss from l1 7616180873 #
l2 hit from l2 pf 32681720010 #
l3 hit from l2 pf 31643262792 #
l3 miss from l2 pf 20537034976 #
instructions 3859524617727 # 61.757 float per 1000 inst
float 512 49 # 0.000 AVX-512 per 1000 inst
float 256 20825894754 # 5.396 AVX-256 per 1000 inst
float 128 217526082164 # 56.361 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 7 # 0.000 scalar per 1000 inst
Intel metrics
elapsed 1064.589
on_cpu 0.057 # 0.92 / 16 cores
utime 900.027
stime 76.835
nvcsw 2024 # 31.70%
nivcsw 4361 # 68.30%
inblock 5824 # 5.47/sec
onblock 2256 # 2.12/sec
cpu-clock 958565278780 # 958.565 seconds
task-clock 958030477330 # 958.030 seconds
page faults 3644797 # 3804.469/sec
context switches 11494 # 11.998/sec
cpu migrations 715 # 0.746/sec
major page faults 21 # 0.022/sec
minor page faults 3644776 # 3804.447/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 2034933733227 # 151.323 branches per 1000 inst
branch misses 6610203847 # 0.32% branch miss
conditional 2034933746187 # 151.323 conditional branches per 1000 inst
indirect 1353675464 # 0.101 indirect branches per 1000 inst
slots 20711401748834 #
retiring 9582714603191 # 46.3% (46.3%)
-- ucode 833592945195 # 4.0%
-- fastpath 8749121657996 # 42.2%
frontend 3817548477815 # 18.4% (18.4%)
-- latency 1765649812090 # 8.5%
-- bandwidth 2051898665725 # 9.9%
backend 6769475286303 # 32.7% (32.7%)
-- cpu 2797925769978 # 13.5%
-- memory 3971549516325 # 19.2%
speculation 1539595442119 # 7.4% ( 7.4%)
-- branch mispredict 1277383990632 # 6.2%
-- pipeline restart 262211451487 # 1.3%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 3457915967322 # 0.21 GHz
instructions 13453460153942 # 3.89 IPC
l2 access 386536318482 # 28.736 l2 access per 1000 inst
l2 miss 145523023280 # 37.65% l2 miss
Process overview
380 processes
15 bench_ondemand 947.56 144.01
68 clinfo 16.20 6.66
38 vulkaninfo 1.31 0.95
4 vulkani:disk$0 0.14 0.10
6 glxinfo:gdrv0 0.14 0.09
6 php 0.09 0.27
2 llvmpipe-0 0.07 0.05
2 llvmpipe-1 0.07 0.05
2 llvmpipe-10 0.07 0.05
2 llvmpipe-11 0.07 0.05
2 llvmpipe-12 0.07 0.05
2 llvmpipe-13 0.07 0.05
2 llvmpipe-14 0.07 0.05
2 llvmpipe-15 0.07 0.05
2 llvmpipe-2 0.07 0.05
2 llvmpipe-3 0.07 0.05
2 llvmpipe-4 0.07 0.05
2 llvmpipe-5 0.07 0.05
2 llvmpipe-6 0.07 0.05
2 llvmpipe-7 0.07 0.05
2 llvmpipe-8 0.07 0.05
2 llvmpipe-9 0.07 0.05
6 clang 0.06 0.06
2 glxinfo 0.06 0.04
2 glxinfo:cs0 0.06 0.03
2 glxinfo:disk$0 0.06 0.03
2 glxinfo:sh0 0.06 0.03
2 glxinfo:shlo0 0.06 0.03
3 rocminfo 0.03 0.00
1 lspci 0.00 0.02
1 ps 0.00 0.01
90 sh 0.00 0.00
15 simdjson 0.00 0.00
13 gcc 0.00 0.00
10 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
4 gmain 0.00 0.00
2 cc 0.00 0.00
2 dconf worker 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 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 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 blocks are straighforward
2823492) simdjson cpu=15 start=5.84 finish=98.89
2823493) bench_ondemand cpu=14 start=5.84 finish=98.89
2823497) simdjson cpu=14 start=102.89 finish=196.91
2823498) bench_ondemand cpu=7 start=102.89 finish=196.91
2823501) simdjson cpu=6 start=200.92 finish=294.99
2823502) bench_ondemand cpu=7 start=200.92 finish=294.99
2823504) sh cpu=8 start=294.99 finish=294.99
2823505) sh cpu=1 start=294.99 finish=294.99
2823506) simdjson cpu=7 start=305.31 finish=378.69
2823507) bench_ondemand cpu=8 start=305.32 finish=378.69
2823508) simdjson cpu=14 start=382.69 finish=455.96
2823509) bench_ondemand cpu=15 start=382.69 finish=455.96
2823544) simdjson cpu=14 start=459.97 finish=533.54
2823545) bench_ondemand cpu=0 start=459.97 finish=533.54
2823546) sh cpu=7 start=533.54 finish=533.54
2823547) sh cpu=0 start=533.54 finish=533.54
2823548) simdjson cpu=6 start=543.72 finish=594.32
2823549) bench_ondemand cpu=7 start=543.73 finish=594.32
2823550) simdjson cpu=6 start=598.32 finish=649.21
2823551) bench_ondemand cpu=15 start=598.32 finish=649.21
2823552) simdjson cpu=6 start=653.21 finish=703.82
2823553) bench_ondemand cpu=15 start=653.21 finish=703.82
2823555) sh cpu=15 start=703.82 finish=703.82
2823556) sh cpu=0 start=703.82 finish=703.82
2823558) simdjson cpu=14 start=714.00 finish=786.58
2823559) bench_ondemand cpu=7 start=714.00 finish=786.58
2823631) simdjson cpu=6 start=790.58 finish=862.67
2823632) bench_ondemand cpu=7 start=790.59 finish=862.67
2823634) simdjson cpu=14 start=866.68 finish=938.66
2823635) bench_ondemand cpu=7 start=866.68 finish=938.66
2823639) sh cpu=0 start=938.66 finish=938.66
2823640) sh cpu=9 start=938.66 finish=938.66
2823641) simdjson cpu=6 start=949.02 finish=1022.77
2823642) bench_ondemand cpu=7 start=949.02 finish=1022.77
2823644) simdjson cpu=14 start=1026.78 finish=1101.20
2823645) bench_ondemand cpu=7 start=1026.78 finish=1101.20
2823648) simdjson cpu=14 start=1105.21 finish=1178.76
2823649) bench_ondemand cpu=7 start=1105.21 finish=1178.75