Test of a media encoder for AV1 format using 16 different test cases. These seem to vary on number of runnable processes as well as how busy the CPU cores are kept.
Topdown profiles show occasional frontend stalls but more dominated by backend memory stalls and a mid-level retirement
AMD metrics show on average running on half the cores. Some floating point and not very many branches.
elapsed 2276.295
on_cpu 0.493 # 7.88 / 16 cores
utime 17665.690
stime 280.753
nvcsw 14114020 # 98.83%
nivcsw 167320 # 1.17%
inblock 0 # 0.00/sec
onblock 201704 # 88.61/sec
cpu-clock 17919079774968 # 17919.080 seconds
task-clock 17926988199725 # 17926.988 seconds
page faults 43234643 # 2411.707/sec
context switches 14292008 # 797.234/sec
cpu migrations 34673 # 1.934/sec
major page faults 799 # 0.045/sec
minor page faults 43233844 # 2411.662/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 7098286347416 # 67.726 branches per 1000 inst
branch misses 104143888828 # 1.47% branch miss
conditional 5790064231135 # 55.244 conditional branches per 1000 inst
indirect 204125042808 # 1.948 indirect branches per 1000 inst
cpu-cycles 69273323037251 # 1.79 GHz
instructions 109171124055305 # 1.58 IPC
slots 138509791403472 #
retiring 36282593854356 # 26.2% (35.2%)
-- ucode 64945263255 # 0.0%
-- fastpath 36217648591101 # 26.1%
frontend 12898774713475 # 9.3% (12.5%)
-- latency 8858202001362 # 6.4%
-- bandwidth 4040572712113 # 2.9%
backend 52192703052128 # 37.7% (50.6%)
-- cpu 15916741610982 # 11.5%
-- memory 36275961441146 # 26.2%
speculation 1744351594826 # 1.3% ( 1.7%)
-- branch mispredict 1684874499188 # 1.2%
-- pipeline restart 59477095638 # 0.0%
smt-contention 35389948976400 # 25.6% ( 0.0%)
cpu-cycles 66976690835536 # 1.77 GHz
instructions 106537986397909 # 1.59 IPC
instructions 35497402711557 # 71.862 l2 access per 1000 inst
l2 hit from l1 1983397983497 # 9.58% l2 miss
l2 miss from l1 130076666250 #
l2 hit from l2 pf 453115676932 #
l3 hit from l2 pf 79419555362 #
l3 miss from l2 pf 34973391671 #
instructions 35484242372575 # 113.131 float per 1000 inst
float 512 180 # 0.000 AVX-512 per 1000 inst
float 256 588 # 0.000 AVX-256 per 1000 inst
float 128 4014364969945 # 113.131 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 61848 # 0.000 scalar per 1000 inst
Intel metrics
elapsed 3545.058
on_cpu 0.597 # 9.54 / 16 cores
utime 33458.439
stime 378.988
nvcsw 29791383 # 98.64%
nivcsw 410241 # 1.36%
inblock 8928 # 2.52/sec
onblock 159936 # 45.12/sec
cpu-clock 33776356152864 # 33776.356 seconds
task-clock 33787174021112 # 33787.174 seconds
page faults 46536742 # 1377.349/sec
context switches 30218803 # 894.387/sec
cpu migrations 435720 # 12.896/sec
major page faults 308 # 0.009/sec
minor page faults 46536434 # 1377.340/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 9846368555244 # 61.950 branches per 1000 inst
branch misses 134683159152 # 1.37% branch miss
conditional 9846368644140 # 61.950 conditional branches per 1000 inst
indirect 2925897507424 # 18.409 indirect branches per 1000 inst
slots 198700353218444 #
retiring 111274731064663 # 56.0% (56.0%)
-- ucode 8502464763869 # 4.3%
-- fastpath 102772266300794 # 51.7%
frontend 31289436066663 # 15.7% (15.7%)
-- latency 19819385118484 # 10.0%
-- bandwidth 11470050948179 # 5.8%
backend 47506138189700 # 23.9% (23.9%)
-- cpu 23218262742886 # 11.7%
-- memory 24287875446814 # 12.2%
speculation 11676409983912 # 5.9% ( 5.9%)
-- branch mispredict 11341721304326 # 5.7%
-- pipeline restart 334688679586 # 0.2%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 118239467131762 # 1.75 GHz
instructions 222294493255214 # 1.88 IPC
l2 access 6755722248527 # 60.866 l2 access per 1000 inst
l2 miss 1024804494949 # 15.17% l2 miss
Process overview
2409 processes
93 aomenc 16959.58 203.65
1665 aom enc worker 117.00 0.00
68 clinfo 16.53 6.08
38 vulkaninfo 0.95 1.33
6 php 0.24 0.73
6 glxinfo:gdrv0 0.11 0.10
4 vulkani:disk$0 0.10 0.14
2 llvmpipe-0 0.05 0.07
2 llvmpipe-1 0.05 0.07
2 llvmpipe-10 0.05 0.07
2 llvmpipe-11 0.05 0.07
2 llvmpipe-12 0.05 0.07
2 llvmpipe-13 0.05 0.07
2 llvmpipe-14 0.05 0.07
2 llvmpipe-15 0.05 0.07
2 llvmpipe-2 0.05 0.07
2 llvmpipe-3 0.05 0.07
2 llvmpipe-4 0.05 0.07
2 llvmpipe-5 0.05 0.07
2 llvmpipe-6 0.05 0.07
2 llvmpipe-7 0.05 0.07
2 llvmpipe-8 0.05 0.07
2 llvmpipe-9 0.05 0.07
6 clang 0.05 0.06
2 glxinfo 0.05 0.04
2 glxinfo:cs0 0.05 0.04
2 glxinfo:disk$0 0.05 0.04
2 glxinfo:sh0 0.05 0.04
2 glxinfo:shlo0 0.05 0.04
3 rocminfo 0.03 0.00
1 lspci 0.00 0.02
1 ps 0.00 0.01
112 sh 0.00 0.00
94 sed 0.00 0.00
93 aom-av1 0.00 0.00
93 rm 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 gmain 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 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 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 structures seem to be set on one CPU at least as far as the last CPU run on?
34201) aom-av1 cpu=3 start=5.69 finish=105.89
34202) aomenc cpu=5 start=5.69 finish=105.81
34203) aom enc worker cpu=0 start=5.96 finish=6.87
34204) aom enc worker cpu=0 start=5.96 finish=6.87
34205) aom enc worker cpu=0 start=5.96 finish=6.87
34206) aom enc worker cpu=0 start=5.96 finish=6.87
34207) aom enc worker cpu=0 start=5.96 finish=6.87
34208) aom enc worker cpu=0 start=5.96 finish=6.87
34209) aom enc worker cpu=0 start=5.96 finish=6.87
34210) aom enc worker cpu=0 start=5.96 finish=6.87
34211) aom enc worker cpu=0 start=5.96 finish=6.87
34212) aom enc worker cpu=0 start=5.96 finish=6.87
34213) aom enc worker cpu=0 start=5.96 finish=6.87
34214) aom enc worker cpu=0 start=5.96 finish=6.87
34215) aom enc worker cpu=0 start=5.96 finish=6.87
34216) aom enc worker cpu=0 start=5.96 finish=6.87
34217) aom enc worker cpu=0 start=5.96 finish=6.87
34218) aom enc worker cpu=0 start=7.07 finish=105.80
34219) aom enc worker cpu=0 start=7.07 finish=105.80
34220) aom enc worker cpu=0 start=7.07 finish=105.80
34221) aom enc worker cpu=0 start=7.07 finish=105.80
34222) aom enc worker cpu=0 start=7.07 finish=105.80
34223) aom enc worker cpu=0 start=7.07 finish=105.81
34224) aom enc worker cpu=0 start=7.07 finish=105.81
34225) aom enc worker cpu=0 start=7.08 finish=105.81
34226) aom enc worker cpu=0 start=7.08 finish=105.81
34227) aom enc worker cpu=0 start=7.08 finish=105.81
34228) aom enc worker cpu=0 start=7.08 finish=105.81
34229) aom enc worker cpu=0 start=7.08 finish=105.81
34230) aom enc worker cpu=0 start=7.08 finish=105.81
34231) aom enc worker cpu=0 start=7.08 finish=105.81
34232) aom enc worker cpu=0 start=7.08 finish=105.81
34236) sed cpu=4 start=105.88 finish=105.89
34237) rm cpu=14 start=105.89 finish=105.89