Workload builds the Gem5 architectural simulator, much of the build looks parallel followed by a more serial link type step.
Topdown profile has some general trends of increasing and decreasing backend stalls vs frontend stalls with retirement rate fairly constant. Link steps are also more scattered.
AMD metrics show an average of ~3/4 of the cores. Not much floating point and a relatively low retirement rate. Overall frontend stalls are more than backend stalls.
elapsed 1810.174
on_cpu 0.798 # 12.77 / 16 cores
utime 21039.238
stime 2080.631
nvcsw 5803731 # 49.87%
nivcsw 5834033 # 50.13%
inblock 264736 # 146.25/sec
onblock 28346440 # 15659.51/sec
cpu-clock 23120522443545 # 23120.522 seconds
task-clock 23121037448160 # 23121.037 seconds
page faults 570590844 # 24678.427/sec
context switches 11599518 # 501.687/sec
cpu migrations 85722 # 3.708/sec
major page faults 355 # 0.015/sec
minor page faults 570590489 # 24678.412/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 16761584492164 # 212.300 branches per 1000 inst
branch misses 551611408858 # 3.29% branch miss
conditional 12834111922087 # 162.555 conditional branches per 1000 inst
indirect 447266406613 # 5.665 indirect branches per 1000 inst
cpu-cycles 93170670452725 # 3.21 GHz
instructions 78575451599875 # 0.84 IPC
slots 187059658915890 #
retiring 25539899492009 # 13.7% (16.7%)
-- ucode 28169462556 # 0.0%
-- fastpath 25511730029453 # 13.6%
frontend 66132587341647 # 35.4% (43.3%)
-- latency 50402032103478 # 26.9%
-- bandwidth 15730555238169 # 8.4%
backend 55784381168682 # 29.8% (36.5%)
-- cpu 5570341440845 # 3.0%
-- memory 50214039727837 # 26.8%
speculation 5229248647360 # 2.8% ( 3.4%)
-- branch mispredict 5186046814231 # 2.8%
-- pipeline restart 43201833129 # 0.0%
smt-contention 34373330798460 # 18.4% ( 0.0%)
cpu-cycles 93195909000520 # 3.22 GHz
instructions 78560812172363 # 0.84 IPC
instructions 26242593467181 # 56.818 l2 access per 1000 inst
l2 hit from l1 1312292335999 # 22.59% l2 miss
l2 miss from l1 243869038203 #
l2 hit from l2 pf 85842273432 #
l3 hit from l2 pf 33296301776 #
l3 miss from l2 pf 59615007749 #
instructions 26232003919217 # 16.024 float per 1000 inst
float 512 18926 # 0.000 AVX-512 per 1000 inst
float 256 15702223 # 0.001 AVX-256 per 1000 inst
float 128 420327679598 # 16.023 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 96 # 0.000 scalar per 1000 inst
instructions 2688226 #
opcache 992870 # 369.340 opcache per 1000 inst
opcache miss 533920 # 53.8% opcache miss rate
l1 dTLB miss 6899 # 2.566 L1 dTLB per 1000 inst
l2 dTLB miss 1234 # 0.459 L2 dTLB per 1000 inst
instructions 2731843 #
icache 1332619 # 487.810 icache per 1000 inst
icache miss 114026 # 8.6% 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 20 # 0.007 TLB flush per 1000 inst
Intel metrics
elapsed 2076.244
on_cpu 0.816 # 13.06 / 16 cores
utime 25333.567
stime 1777.001
nvcsw 5656806 # 49.63%
nivcsw 5740028 # 50.37%
inblock 5287080 # 2546.46/sec
onblock 28341616 # 13650.43/sec
cpu-clock 27109637330759 # 27109.637 seconds
task-clock 27110152714913 # 27110.153 seconds
page faults 570476396 # 21042.906/sec
context switches 11358674 # 418.982/sec
cpu migrations 77819 # 2.870/sec
major page faults 3385 # 0.125/sec
minor page faults 570473011 # 21042.781/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 16554533948074 # 210.331 branches per 1000 inst
branch misses 420682840418 # 2.54% branch miss
conditional 16554535761194 # 210.331 conditional branches per 1000 inst
indirect 3208214057581 # 40.761 indirect branches per 1000 inst
slots 131943668586950 #
retiring 41217833930568 # 31.2% (31.2%)
-- ucode 3112135628076 # 2.4%
-- fastpath 38105698302492 # 28.9%
frontend 48463557156999 # 36.7% (36.7%)
-- latency 27839065050420 # 21.1%
-- bandwidth 20624492106579 # 15.6%
backend 25399276106394 # 19.3% (19.3%)
-- cpu 7245422419378 # 5.5%
-- memory 18153853687016 # 13.8%
speculation 17330208537534 # 13.1% (13.1%) high
-- branch mispredict 16790007180191 # 12.7%
-- pipeline restart 540201357343 # 0.4%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 56299806242194 # 1.71 GHz
instructions 58419307240398 # 1.04 IPC
l2 access 2518816460984 # 58.099 l2 access per 1000 inst
l2 miss 761491659232 # 30.23% l2 miss
cpu-cycles 41773327892901 # 39.7% memory latency
load stalls 16220631545169 # 6.6% l1 bound
l1 miss 13482977988921 # 9.4% l2 bound
l2 miss 9548023073896 # 4.6% l3 bound
l3 miss 7615533491900 # 18.2% dram bound
store_stalls 357499861823 # 0.9% store bound
Process overview shows C++ code with most time in the c11plus front end.
56641 processes
6774 cc1plus 18279.62 1401.27
54 scons 2290.93 186.88
7803 as 1291.39 202.47
2730 gem5py_m5 761.97 38.80
51 ld 261.27 23.85
2781 gem5py 104.47 9.99
68 clinfo 17.85 6.34
1029 cc1 1.66 0.19
3 gzip 1.00 0.09
38 vulkaninfo 0.76 1.52
6 php 0.18 0.43
6 glxinfo:gdrv0 0.13 0.05
6 glxinfo:gl0 0.13 0.05
4 vulkani:disk$0 0.08 0.16
4 python3 0.08 0.03
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
6 clang 0.07 0.05
3 tar 0.04 1.03
2 llvmpipe-0 0.04 0.08
2 llvmpipe-1 0.04 0.08
2 llvmpipe-10 0.04 0.08
2 llvmpipe-11 0.04 0.08
2 llvmpipe-12 0.04 0.08
2 llvmpipe-13 0.04 0.08
2 llvmpipe-14 0.04 0.08
2 llvmpipe-15 0.04 0.08
2 llvmpipe-2 0.04 0.08
2 llvmpipe-3 0.04 0.08
2 llvmpipe-4 0.04 0.08
2 llvmpipe-5 0.04 0.08
2 llvmpipe-6 0.04 0.08
2 llvmpipe-7 0.04 0.08
2 llvmpipe-8 0.04 0.08
2 llvmpipe-9 0.04 0.08
3 rocminfo 0.03 0.00
7 rm 0.02 2.94
21 ar 0.02 0.07
6833 g++ 0.00 0.06
21 ranlib 0.00 0.06
1 lspci 0.00 0.02
1 ps 0.00 0.01
26956 sh 0.00 0.00
1078 gcc 0.00 0.00
66 python3-config 0.00 0.00
51 collect2 0.00 0.00
28 sed 0.00 0.00
13 dirname 0.00 0.00
13 readlink 0.00 0.00
9 m4 0.00 0.00
9 native-elf-form 0.00 0.00
8 stat 0.00 0.00
8 systemd-detect- 0.00 0.00
8 which 0.00 0.00
6 gsettings 0.00 0.00
6 llvm-link 0.00 0.00
6 pkg-config 0.00 0.00
6 swig 0.00 0.00
5 cc 0.00 0.00
5 dconf worker 0.00 0.00
5 gmain 0.00 0.00
5 phoronix-test-s 0.00 0.00
4 bash 0.00 0.00
4 date 0.00 0.00
4 mktemp 0.00 0.00
3 awk 0.00 0.00
3 basename 0.00 0.00
3 build-gem5 0.00 0.00
3 conftest_2176b2 0.00 0.00
3 conftest_283931 0.00 0.00
3 readelf 0.00 0.00
3 touch 0.00 0.00
2 lscpu 0.00 0.00
2 uname 0.00 0.00
2 xset 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 python 0.00 0.00
1 qdbus 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
1 processes running
108 maximum processes