A quick running example of the cython interpeter using the n-queens workload. The test is single-threaded and runs in ~20 seconds.
Topdown profile suggests a high retirement rate and some backend stalls
AMD metrics show little floating point and high backend stalls
elapsed 67.939
on_cpu 0.049 # 0.78 / 16 cores
utime 52.314
stime 0.756
nvcsw 2051 # 83.07%
nivcsw 418 # 16.93%
inblock 32 # 0.47/sec
onblock 12792 # 188.29/sec
cpu-clock 53091178724 # 53.091 seconds
task-clock 53093891724 # 53.094 seconds
page faults 150769 # 2839.668/sec
context switches 2635 # 49.629/sec
cpu migrations 285 # 5.368/sec
major page faults 2 # 0.038/sec
minor page faults 150767 # 2839.630/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 170004081415 # 211.601 branches per 1000 inst
branch misses 1305434728 # 0.77% branch miss
conditional 124187206181 # 154.573 conditional branches per 1000 inst
indirect 13921946370 # 17.328 indirect branches per 1000 inst
cpu-cycles 1046008726399 # 0.23 GHz
instructions 3443358962832 # 3.29 IPC high
slots 2098017000798 #
retiring 1155054414132 # 55.1% (55.1%) high
-- ucode 673958914 # 0.0%
-- fastpath 1154380455218 # 55.0%
frontend 413292672034 # 19.7% (19.7%)
-- latency 245604816006 # 11.7%
-- bandwidth 167687856028 # 8.0%
backend 314355791717 # 15.0% (15.0%) low
-- cpu 59950768323 # 2.9%
-- memory 254405023394 # 12.1%
speculation 215245053961 # 10.3% (10.3%) high
-- branch mispredict 174245301803 # 8.3%
-- pipeline restart 40999752158 # 2.0%
smt-contention 68804656 # 0.0% ( 0.0%)
cpu-cycles 247390165646 # 0.22 GHz
instructions 799729473282 # 3.23 IPC high
instructions 267707014735 # 1.746 l2 access per 1000 inst
l2 hit from l1 450707306 # 4.58% l2 miss
l2 miss from l1 11826992 #
l2 hit from l2 pf 7245387 #
l3 hit from l2 pf 3928618 #
l3 miss from l2 pf 5639194 #
instructions 267252045787 # 11.900 float per 1000 inst
float 512 63 # 0.000 AVX-512 per 1000 inst
float 256 628 # 0.000 AVX-256 per 1000 inst
float 128 3180169924 # 11.900 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 6 # 0.000 scalar per 1000 inst
instructions 2692907 #
opcache 999972 # 371.336 opcache per 1000 inst
opcache miss 537113 # 53.7% opcache miss rate
l1 dTLB miss 6208 # 2.305 L1 dTLB per 1000 inst
l2 dTLB miss 1288 # 0.478 L2 dTLB per 1000 inst
instructions 2707712 #
icache 1285731 # 474.840 icache per 1000 inst
icache miss 109556 # 8.5% icache miss rate
l1 iTLB miss 11 # 0.004 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 19 # 0.007 TLB flush per 1000 inst
Intel metricfs
elapsed 73.454
on_cpu 0.051 # 0.81 / 16 cores
utime 59.236
stime 0.413
nvcsw 1417 # 80.28%
nivcsw 348 # 19.72%
inblock 648 # 8.82/sec
onblock 1360 # 18.51/sec
cpu-clock 59661572578 # 59.662 seconds
task-clock 59663943454 # 59.664 seconds
page faults 132647 # 2223.236/sec
context switches 1964 # 32.918/sec
cpu migrations 247 # 4.140/sec
major page faults 4 # 0.067/sec
minor page faults 132643 # 2223.169/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 169463250010 # 210.583 branches per 1000 inst
branch misses 1238803250 # 0.73% branch miss
conditional 169463260730 # 210.583 conditional branches per 1000 inst
indirect 13917096254 # 17.294 indirect branches per 1000 inst
slots 1358973405050 #
retiring 764876383363 # 56.3% (56.3%) high
-- ucode 58405381892 # 4.3%
-- fastpath 706471001471 # 52.0%
frontend 270062862871 # 19.9% (19.9%)
-- latency 106202662237 # 7.8%
-- bandwidth 163860200634 # 12.1%
backend 102804963702 # 7.6% ( 7.6%) low
-- cpu 93061163093 # 6.8%
-- memory 9743800609 # 0.7%
speculation 219513323526 # 16.2% (16.2%) high
-- branch mispredict 170335667921 # 12.5%
-- pipeline restart 49177655605 # 3.6%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 225248160861 # 0.19 GHz
instructions 805041620058 # 3.57 IPC high
l2 access 397729579 # 0.495 l2 access per 1000 inst
l2 miss 83846088 # 21.08% l2 miss
cpu-cycles 223534667994 # 4.5% memory latency
load stalls 9976909069 # 4.0% l1 bound
l1 miss 1008580401 # 0.3% l2 bound
l2 miss 380699632 # 0.0% l3 bound
l3 miss 276044977 # 0.1% dram bound
store_stalls 70230668 # 0.0% store bound
Process summary shows this driven as a python process
355 processes
4 python3 51.85 0.00
68 clinfo 20.84 5.66
38 vulkaninfo 1.14 1.71
6 glxinfo:gdrv0 0.16 0.06
6 glxinfo:gl0 0.16 0.06
4 vulkani:disk$0 0.12 0.19
2 glxinfo 0.08 0.02
2 glxinfo:cs0 0.08 0.02
2 glxinfo:disk$0 0.08 0.02
2 glxinfo:sh0 0.08 0.02
2 glxinfo:shlo0 0.08 0.02
2 llvmpipe-0 0.06 0.10
2 llvmpipe-1 0.06 0.10
2 llvmpipe-10 0.06 0.10
2 llvmpipe-11 0.06 0.10
2 llvmpipe-12 0.06 0.10
2 llvmpipe-13 0.06 0.10
2 llvmpipe-14 0.06 0.10
2 llvmpipe-15 0.06 0.10
2 llvmpipe-2 0.06 0.10
2 llvmpipe-3 0.06 0.10
2 llvmpipe-4 0.06 0.10
2 llvmpipe-5 0.06 0.10
2 llvmpipe-6 0.06 0.10
2 llvmpipe-7 0.06 0.10
2 llvmpipe-8 0.06 0.10
2 llvmpipe-9 0.06 0.10
6 php 0.06 0.07
6 clang 0.03 0.09
3 rocminfo 0.03 0.03
1 lspci 0.01 0.02
1 ps 0.00 0.01
83 sh 0.00 0.00
12 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
3 cython-bench 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 cc 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 python 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 block
756108) cython-bench cpu=7 start=5.54 finish=22.51
756109) python3 cpu=1 start=5.54 finish=22.50
756113) cython-bench cpu=1 start=26.51 finish=43.62
756114) python3 cpu=2 start=26.51 finish=43.62
756115) cython-bench cpu=9 start=47.62 finish=65.43
756116) python3 cpu=10 start=47.62 finish=65.42