A RAW image decoder library using one test that runs quickly on about half the cores.
Topdown profile shows a higer retirement rate, some backend stalls and then frontend stalls.
AMD metrics show some floating point code and not many L2 accesses
elapsed 92.773
on_cpu 0.245 # 3.92 / 16 cores
utime 344.601
stime 18.720
nvcsw 8707 # 74.14%
nivcsw 3037 # 25.86%
inblock 0 # 0.00/sec
onblock 12976 # 139.87/sec
cpu-clock 363253670075 # 363.254 seconds
task-clock 363275710684 # 363.276 seconds
page faults 10061284 # 27696.000/sec
context switches 11996 # 33.022/sec
cpu migrations 1849 # 5.090/sec
major page faults 4 # 0.011/sec
minor page faults 10061280 # 27695.989/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 371921917436 # 95.516 branches per 1000 inst
branch misses 11533532006 # 3.10% branch miss
conditional 288187005963 # 74.011 conditional branches per 1000 inst
indirect 11398445179 # 2.927 indirect branches per 1000 inst
cpu-cycles 1510864437836 # 1.08 GHz
instructions 3884284187340 # 2.57 IPC
slots 3024212308902 #
retiring 1355578218166 # 44.8% (51.1%)
-- ucode 886801671 # 0.0%
-- fastpath 1354691416495 # 44.8%
frontend 403473766023 # 13.3% (15.2%)
-- latency 276939449082 # 9.2%
-- bandwidth 126534316941 # 4.2%
backend 667421081203 # 22.1% (25.2%)
-- cpu 287734107756 # 9.5%
-- memory 379686973447 # 12.6%
speculation 225291888102 # 7.4% ( 8.5%)
-- branch mispredict 223143227858 # 7.4%
-- pipeline restart 2148660244 # 0.1%
smt-contention 372445243153 # 12.3% ( 0.0%)
cpu-cycles 1518221305031 # 1.09 GHz
instructions 3875946618563 # 2.55 IPC
instructions 1297207670686 # 11.784 l2 access per 1000 inst
l2 hit from l1 8328408905 # 18.65% l2 miss
l2 miss from l1 185058158 #
l2 hit from l2 pf 4292229866 #
l3 hit from l2 pf 342343388 #
l3 miss from l2 pf 2322779786 #
instructions 1299139440391 # 73.167 float per 1000 inst
float 512 53 # 0.000 AVX-512 per 1000 inst
float 256 454 # 0.000 AVX-256 per 1000 inst
float 128 95054465502 # 73.167 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
instructions 3890132649249 #
opcache 546431242470 # 140.466 opcache per 1000 inst
opcache miss 8678068146 # 1.6% opcache miss rate
l1 dTLB miss 483224034 # 0.124 L1 dTLB per 1000 inst
l2 dTLB miss 85475382 # 0.022 L2 dTLB per 1000 inst
instructions 3889800003726 #
icache 19586198023 # 5.035 icache per 1000 inst
icache miss 511702557 # 2.6% icache miss rate
l1 iTLB miss 8762679 # 0.002 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 20375 # 0.000 TLB flush per 1000 inst
Intel metrics confirm not much memory activity
elapsed 110.052
on_cpu 0.276 # 4.41 / 16 cores
utime 467.837
stime 17.337
nvcsw 8661 # 65.86%
nivcsw 4490 # 34.14%
inblock 624 # 5.67/sec
onblock 1688 # 15.34/sec
cpu-clock 485020107325 # 485.020 seconds
task-clock 485036129248 # 485.036 seconds
page faults 10056637 # 20733.789/sec
context switches 13484 # 27.800/sec
cpu migrations 3667 # 7.560/sec
major page faults 0 # 0.000/sec
minor page faults 10056637 # 20733.789/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 368733785557 # 94.829 branches per 1000 inst
branch misses 10172337462 # 2.76% branch miss
conditional 368733800853 # 94.829 conditional branches per 1000 inst
indirect 76920101111 # 19.782 indirect branches per 1000 inst
slots 4936643839022 #
retiring 2524863572358 # 51.1% (51.1%)
-- ucode 155834186802 # 3.2%
-- fastpath 2369029385556 # 48.0%
frontend 547568286220 # 11.1% (11.1%)
-- latency 258935604686 # 5.2%
-- bandwidth 288632681534 # 5.8%
backend 1136515909022 # 23.0% (23.0%)
-- cpu 990322802368 # 20.1%
-- memory 146193106654 # 3.0%
speculation 858612251070 # 17.4% (17.4%) high
-- branch mispredict 849565895371 # 17.2%
-- pipeline restart 9046355699 # 0.2%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 1729873292296 # 0.83 GHz
instructions 4434644648060 # 2.56 IPC
l2 access 21287223434 # 8.591 l2 access per 1000 inst
l2 miss 10391816082 # 48.82% l2 miss
cpu-cycles 967524598650 # 7.7% memory latency
load stalls 65110295869 # 1.5% l1 bound
l1 miss 50619430068 # 3.6% l2 bound
l2 miss 16022667734 # 0.4% l3 bound
l3 miss 12272259351 # 1.3% dram bound
store_stalls 8999117992 # 0.9% store bound
Process overviews gives name as postprocessing_
438 processes
75 postprocessing_ 5494.88 281.28
68 clinfo 17.84 7.98
38 vulkaninfo 1.52 1.32
4 vulkani:disk$0 0.16 0.14
6 glxinfo:gdrv0 0.12 0.08
6 glxinfo:gl0 0.12 0.08
2 llvmpipe-0 0.08 0.08
2 llvmpipe-1 0.08 0.08
2 llvmpipe-10 0.08 0.08
2 llvmpipe-11 0.08 0.08
2 llvmpipe-12 0.08 0.08
2 llvmpipe-13 0.08 0.08
2 llvmpipe-14 0.08 0.08
2 llvmpipe-15 0.08 0.08
2 llvmpipe-2 0.08 0.08
2 llvmpipe-3 0.08 0.08
2 llvmpipe-4 0.08 0.08
2 llvmpipe-5 0.08 0.08
2 llvmpipe-6 0.08 0.08
2 llvmpipe-7 0.08 0.08
2 llvmpipe-8 0.08 0.08
2 llvmpipe-9 0.08 0.08
6 php 0.07 0.06
2 glxinfo 0.06 0.04
2 glxinfo:cs0 0.06 0.04
2 glxinfo:disk$0 0.06 0.04
2 glxinfo:sh0 0.06 0.04
2 glxinfo:shlo0 0.06 0.04
6 clang 0.04 0.08
3 rocminfo 0.03 0.00
1 lspci 0.01 0.02
1 ps 0.00 0.01
82 sh 0.00 0.00
13 gcc 0.00 0.00
12 gsettings 0.00 0.00
10 sed 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
3 libraw 0.00 0.00
3 ls 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 blocks
57005) libraw cpu=5 start=5.88 finish=29.81
57006) postprocessing_ cpu=0 start=5.88 finish=29.80
57007) postprocessing_ cpu=3 start=5.88 finish=5.88
57008) postprocessing_ cpu=4 start=5.88 finish=5.88
57009) postprocessing_ cpu=15 start=5.89 finish=5.89
57010) postprocessing_ cpu=2 start=5.89 finish=5.89
57011) postprocessing_ cpu=14 start=5.89 finish=5.89
57012) sed cpu=0 start=5.89 finish=5.89
57013) postprocessing_ cpu=14 start=5.89 finish=5.89
57014) ls cpu=3 start=5.89 finish=5.89
57015) sed cpu=4 start=5.89 finish=5.89
57016) postprocessing_ cpu=2 start=5.89 finish=5.90
57017) postprocessing_ cpu=15 start=5.90 finish=5.90
57018) postprocessing_ cpu=0 start=5.90 finish=5.90
57019) sed cpu=10 start=5.90 finish=5.90
57020) postprocessing_ cpu=9 start=6.36 finish=29.80
57021) postprocessing_ cpu=7 start=6.36 finish=29.80
57022) postprocessing_ cpu=5 start=6.36 finish=29.80
57023) postprocessing_ cpu=2 start=6.36 finish=29.80
57024) postprocessing_ cpu=13 start=6.36 finish=29.80
57025) postprocessing_ cpu=11 start=6.36 finish=29.80
57026) postprocessing_ cpu=3 start=6.36 finish=29.80
57027) postprocessing_ cpu=1 start=6.36 finish=29.80
57028) postprocessing_ cpu=4 start=6.36 finish=29.80
57029) postprocessing_ cpu=14 start=6.36 finish=29.80
57030) postprocessing_ cpu=6 start=6.36 finish=29.80
57031) postprocessing_ cpu=8 start=6.36 finish=29.80
57032) postprocessing_ cpu=15 start=6.36 finish=29.80
57033) postprocessing_ cpu=12 start=6.36 finish=29.80
57034) postprocessing_ cpu=10 start=6.36 finish=29.80