This workload builds the python reference implementation. There are two builds – a quick default build followed by a longer running release build with PGO and LTO that takes much longer. These builds appear to have just a few processes much of the time.
Topdown profile shows a mismash with a small section that is backend bound, a lot of frontend bound but also still a moderate retirement rate.
AMD metrics are a composite of the chart above. Frontend bound stalls dominate. 1/5 of the instructions are branches and there is little floating point.
elapsed 294.674
on_cpu 0.206 # 3.29 / 16 cores
utime 893.905
stime 76.692
nvcsw 67142 # 42.74%
nivcsw 89970 # 57.26%
inblock 0 # 0.00/sec
onblock 6307048 # 21403.46/sec
cpu-clock 969640099315 # 969.640 seconds
task-clock 969714791934 # 969.715 seconds
page faults 20445840 # 21084.385/sec
context switches 137572 # 141.869/sec
cpu migrations 3852 # 3.972/sec
major page faults 70 # 0.072/sec
minor page faults 20445770 # 21084.313/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 1263933056973 # 209.294 branches per 1000 inst
branch misses 34718136087 # 2.75% branch miss
conditional 978456026819 # 162.022 conditional branches per 1000 inst
indirect 28886374282 # 4.783 indirect branches per 1000 inst
cpu-cycles 3927940269465 # 0.83 GHz
instructions 5937421788873 # 1.51 IPC
slots 8063145430038 #
retiring 1967167817888 # 24.4% (27.2%)
-- ucode 2070157350 # 0.0%
-- fastpath 1965097660538 # 24.4%
frontend 2824239940812 # 35.0% (39.0%)
-- latency 2017706742918 # 25.0%
-- bandwidth 806533197894 # 10.0%
backend 1919470574265 # 23.8% (26.5%)
-- cpu 258477109913 # 3.2%
-- memory 1660993464352 # 20.6%
speculation 529853804360 # 6.6% ( 7.3%)
-- branch mispredict 522073957926 # 6.5%
-- pipeline restart 7779846434 # 0.1%
smt-contention 822390673299 # 10.2% ( 0.0%)
cpu-cycles 3938096924311 # 0.83 GHz
instructions 5938426219684 # 1.51 IPC
instructions 2010234670211 # 37.745 l2 access per 1000 inst
l2 hit from l1 64750413013 # 19.12% l2 miss
l2 miss from l1 8916585026 #
l2 hit from l2 pf 5535757794 #
l3 hit from l2 pf 3443656207 #
l3 miss from l2 pf 2146741781 #
instructions 2009987788704 # 20.783 float per 1000 inst
float 512 5524 # 0.000 AVX-512 per 1000 inst
float 256 39346 # 0.000 AVX-256 per 1000 inst
float 128 41773787580 # 20.783 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 97743 # 0.000 scalar per 1000 inst
instructions 2706172 #
opcache 1010366 # 373.356 opcache per 1000 inst
opcache miss 541242 # 53.6% opcache miss rate
l1 dTLB miss 5369 # 1.984 L1 dTLB per 1000 inst
l2 dTLB miss 1181 # 0.436 L2 dTLB per 1000 inst
instructions 2689543 #
icache 1313506 # 488.375 icache per 1000 inst
icache miss 109997 # 8.4% icache miss rate
l1 iTLB miss 9 # 0.003 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 20 # 0.007 TLB flush per 1000 inst
Intel metrics
elapsed 324.771
on_cpu 0.203 # 3.25 / 16 cores
utime 1005.209
stime 49.719
nvcsw 68644 # 43.09%
nivcsw 90647 # 56.91%
inblock 105168 # 323.82/sec
onblock 6299984 # 19398.21/sec
cpu-clock 1052934916576 # 1052.935 seconds
task-clock 1053092218263 # 1053.092 seconds
page faults 20459766 # 19428.276/sec
context switches 140082 # 133.020/sec
cpu migrations 5057 # 4.802/sec
major page faults 415 # 0.394/sec
minor page faults 20459351 # 19427.882/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 1252397412602 # 207.980 branches per 1000 inst
branch misses 30147723172 # 2.41% branch miss
conditional 1252398109242 # 207.980 conditional branches per 1000 inst
indirect 123489984664 # 20.507 indirect branches per 1000 inst
slots 13345151418776 #
retiring 4518175248187 # 33.9% (33.9%)
-- ucode 338293584704 # 2.5%
-- fastpath 4179881663483 # 31.3%
frontend 4419550588938 # 33.1% (33.1%)
-- latency 2249693527456 # 16.9%
-- bandwidth 2169857061482 # 16.3%
backend 1978497388105 # 14.8% (14.8%) low
-- cpu 879770968330 # 6.6%
-- memory 1098726419775 # 8.2%
speculation 2486337364015 # 18.6% (18.6%) high
-- branch mispredict 2411739973223 # 18.1%
-- pipeline restart 74597390792 # 0.6%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 3207783156104 # 0.62 GHz
instructions 5611188459036 # 1.75 IPC
l2 access 173010524412 # 35.971 l2 access per 1000 inst
l2 miss 45961720723 # 26.57% l2 miss
cpu-cycles 2745334048792 # 23.3% memory latency
load stalls 618825196463 # 3.4% l1 bound
l1 miss 525797505055 # 10.3% l2 bound
l2 miss 243721523743 # 2.5% l3 bound
l3 miss 175148141314 # 6.4% dram bound
store_stalls 19524283725 # 0.7% store bound
Process overview shows the largest portion of time spent in python with other processes mixed
21759 processes
213 python 1725.33 47.47
1960 cc1 458.14 25.39
151 lto1 298.61 6.30
1816 as 59.87 5.13
68 clinfo 16.42 5.98
799 ld 3.61 1.32
56 _testembed 2.27 0.15
38 vulkaninfo 1.14 1.14
2 gzip 0.92 0.03
5053 bash 0.67 2.50
4 vulkani:disk$0 0.12 0.12
6 php 0.11 0.16
14 make 0.10 0.07
6 glxinfo:gdrv0 0.10 0.05
6 glxinfo:gl0 0.10 0.05
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
2 glxinfo 0.06 0.03
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
6 clang 0.05 0.07
2 tar 0.04 0.46
3 rocminfo 0.03 0.00
6 print 0.02 0.00
3 ar 0.01 0.42
12 pkg-config 0.01 0.00
3222 rm 0.00 0.25
151 lto-wrapper 0.00 0.13
2362 gcc 0.00 0.07
46 find 0.00 0.06
1 lspci 0.00 0.03
2141 cat 0.00 0.00
1465 sed 0.00 0.00
797 collect2 0.00 0.00
353 grep 0.00 0.00
258 mv 0.00 0.00
223 sh 0.00 0.00
84 conftest 0.00 0.00
68 basename 0.00 0.00
32 configure 0.00 0.00
32 uname 0.00 0.00
21 bunzip2 0.00 0.00
19 dirname 0.00 0.00
18 expr 0.00 0.00
15 ldd 0.00 0.00
14 awk 0.00 0.00
14 mkdir 0.00 0.00
12 gsettings 0.00 0.00
12 tr 0.00 0.00
9 ld-linux-x86-64 0.00 0.00
8 cc 0.00 0.00
8 ln 0.00 0.00
8 stat 0.00 0.00
8 systemd-detect- 0.00 0.00
7 sort 0.00 0.00
6 hostname 0.00 0.00
6 ld-linux.so.2 0.00 0.00
6 llvm-link 0.00 0.00
6 rmdir 0.00 0.00
5 mktemp 0.00 0.00
5 phoronix-test-s 0.00 0.00
4 arch 0.00 0.00
4 chmod 0.00 0.00
4 diff 0.00 0.00
4 install 0.00 0.00
4 ls 0.00 0.00
3 gmain 0.00 0.00
3 touch 0.00 0.00
2 build-python 0.00 0.00
2 lscpu 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 dmesg 0.00 0.00
1 dmidecode 0.00 0.00
1 ifconfig 0.00 0.00
1 ip 0.00 0.00
1 lsmod 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 stty 0.00 0.00
1 systemctl 0.00 0.00
1 template.sh 0.00 0.00
1 true 0.00 0.00
1 wc 0.00 0.00
1 xrandr 0.00 0.00
0 processes running
109 maximum processes