perlbench is a SPEC CPU(R) benchmark written in C and described here. The workload runs on all logical cores.
Topdown profile shows two different regions, one with higher retirement rate and one with high backend stalls and lower retirement rate.
AMD metrics on 7840 show an overall composite. Backend stalls are memory but overall L2 access is only 15 per 1000 instructions.
elapsed 1272.531
on_cpu 0.984 # 15.75 / 16 cores
utime 20004.904
stime 32.379
nvcsw 29226 # 13.54%
nivcsw 186610 # 86.46%
inblock 24 # 0.02/sec
onblock 689944 # 542.18/sec
cpu-clock 20038316721690 # 20038.317 seconds
task-clock 20038447908679 # 20038.448 seconds
page faults 7803717 # 389.437/sec
context switches 214838 # 10.721/sec
cpu migrations 320 # 0.016/sec
major page faults 1292 # 0.064/sec
minor page faults 7802425 # 389.373/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 24359519286108 # 184.569 branches per 1000 inst
branch misses 152497684614 # 0.63% branch miss
conditional 17499844582222 # 132.594 conditional branches per 1000 inst
indirect 1715179974141 # 12.996 indirect branches per 1000 inst
cpu-cycles 83438427398438 # 4.10 GHz
instructions 132027755278274 # 1.58 IPC
slots 166857301734108 #
retiring 42263589541657 # 25.3% (33.3%)
-- ucode 201051299473 # 0.1%
-- fastpath 42062538242184 # 25.2%
frontend 25063748165431 # 15.0% (19.7%)
-- latency 14691714821874 # 8.8%
-- bandwidth 10372033343557 # 6.2%
backend 56668583336440 # 34.0% (44.7%)
-- cpu 5216347027859 # 3.1%
-- memory 51452236308581 # 30.8%
speculation 2911204089454 # 1.7% ( 2.3%)
-- branch mispredict 2777740218186 # 1.7%
-- pipeline restart 133463871268 # 0.1%
smt-contention 39950017975885 # 23.9% ( 0.0%)
cpu-cycles 83613374302452 # 4.10 GHz
instructions 131994334545013 # 1.58 IPC
instructions 44000032762874 # 15.736 l2 access per 1000 inst
l2 hit from l1 636632609297 # 11.62% l2 miss
l2 miss from l1 44881747863 #
l2 hit from l2 pf 20160423661 #
l3 hit from l2 pf 5353507321 #
l3 miss from l2 pf 30232769175 #
instructions 43983522979100 # 16.803 float per 1000 inst
float 512 273 # 0.000 AVX-512 per 1000 inst
float 256 7288 # 0.000 AVX-256 per 1000 inst
float 128 739053515060 # 16.803 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
instructions 131977660622241 #
opcache 23067837172026 # 174.786 opcache per 1000 inst
opcache miss 1291932014372 # 5.6% opcache miss rate
l1 dTLB miss 628831435258 # 4.765 L1 dTLB per 1000 inst
l2 dTLB miss 17878142548 # 0.135 L2 dTLB per 1000 inst
instructions 131977627392115 #
icache 1717802692184 # 13.016 icache per 1000 inst
icache miss 730826491765 # 42.5% icache miss rate
l1 iTLB miss 177044140214 # 1.341 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 969590 # 0.000 TLB flush per 1000 inst
Process overview shows spec harness and almost all computation in perlbench_r_bas
1061 processes
144 perlbench_r_bas 20009.51 23.32
165 specperl 40.37 3.87
1 clang 0.01 0.00
1 lsb_release 0.01 0.00
41 specinvoke 0.00 0.02
365 sh 0.00 0.00
144 bash 0.00 0.00
54 specrxp 0.00 0.00
21 grep 0.00 0.00
20 cat 0.00 0.00
12 uniq 0.00 0.00
11 ps 0.00 0.00
11 sort 0.00 0.00
10 expand 0.00 0.00
6 pwd 0.00 0.00
5 basename 0.00 0.00
5 specmake 0.00 0.00
5 systemctl 0.00 0.00
4 specpp 0.00 0.00
4 uname 0.00 0.00
3 dirname 0.00 0.00
3 dmidecode 0.00 0.00
3 lscpu 0.00 0.00
2 df 0.00 0.00
2 dpkg 0.00 0.00
2 rm 0.00 0.00
2 runcpu 0.00 0.00
2 specsha512sum 0.00 0.00
2 specxz 0.00 0.00
2 who 0.00 0.00
1 cpupower 0.00 0.00
1 head 0.00 0.00
1 logname 0.00 0.00
1 ls 0.00 0.00
1 numactl 0.00 0.00
1 sysctl 0.00 0.00
1 w 0.00 0.00
1 wc 0.00 0.00
1 which 0.00 0.00
0 processes running
53 maximum processes
specinvoke starts each process separately, looks like separate regions are three separate invocations
12849) specinvoke cpu=4 start=5.15 finish=428.38
12851) sh cpu=0 start=5.15 finish=183.62
12861) bash cpu=0 start=5.15 finish=183.62
12883) perlbench_r_bas cpu=0 start=5.16 finish=183.59
12852) sh cpu=1 start=5.15 finish=184.93
12862) bash cpu=1 start=5.15 finish=184.93
12891) perlbench_r_bas cpu=1 start=5.16 finish=184.91
12853) sh cpu=2 start=5.15 finish=183.88
12865) bash cpu=2 start=5.15 finish=183.88
12889) perlbench_r_bas cpu=2 start=5.16 finish=183.86
12854) sh cpu=3 start=5.15 finish=184.63
12864) bash cpu=3 start=5.15 finish=184.63
12884) perlbench_r_bas cpu=3 start=5.16 finish=184.61
12855) sh cpu=4 start=5.15 finish=184.26
12866) bash cpu=4 start=5.15 finish=184.26
12885) perlbench_r_bas cpu=4 start=5.16 finish=184.24
12856) sh cpu=5 start=5.15 finish=187.82
12867) bash cpu=5 start=5.15 finish=187.82
12887) perlbench_r_bas cpu=5 start=5.16 finish=187.80
12857) sh cpu=14 start=5.15 finish=190.94
12870) bash cpu=6 start=5.15 finish=190.94
12892) perlbench_r_bas cpu=6 start=5.16 finish=190.92
12858) sh cpu=7 start=5.15 finish=184.17
12869) bash cpu=7 start=5.15 finish=184.17
12886) perlbench_r_bas cpu=7 start=5.16 finish=184.14
12859) sh cpu=8 start=5.15 finish=184.46
12872) bash cpu=8 start=5.15 finish=184.45
12888) perlbench_r_bas cpu=8 start=5.16 finish=184.43
12860) sh cpu=9 start=5.15 finish=184.66
12876) bash cpu=9 start=5.15 finish=184.66
12895) perlbench_r_bas cpu=9 start=5.16 finish=184.64
12863) sh cpu=10 start=5.15 finish=183.79
12874) bash cpu=10 start=5.15 finish=183.79
12890) perlbench_r_bas cpu=10 start=5.16 finish=183.77
12868) sh cpu=11 start=5.15 finish=183.38
12878) bash cpu=11 start=5.15 finish=183.38
12893) perlbench_r_bas cpu=11 start=5.16 finish=183.36
12871) sh cpu=12 start=5.15 finish=184.34
12879) bash cpu=12 start=5.15 finish=184.34
12897) perlbench_r_bas cpu=12 start=5.16 finish=184.32
12873) sh cpu=13 start=5.15 finish=187.88
12882) bash cpu=13 start=5.16 finish=187.88
12896) perlbench_r_bas cpu=13 start=5.16 finish=187.86
12875) sh cpu=6 start=5.15 finish=190.94
12880) bash cpu=14 start=5.16 finish=190.94
12894) perlbench_r_bas cpu=14 start=5.16 finish=190.92
12877) sh cpu=15 start=5.15 finish=183.64
12881) bash cpu=15 start=5.16 finish=183.64
12898) perlbench_r_bas cpu=15 start=5.16 finish=183.62
12900) sh cpu=11 start=183.38 finish=277.85
12901) bash cpu=11 start=183.38 finish=277.85
12902) perlbench_r_bas cpu=11 start=183.38 finish=277.83
12903) sh cpu=0 start=183.62 finish=278.63
12904) bash cpu=0 start=183.62 finish=278.63
12905) perlbench_r_bas cpu=0 start=183.62 finish=278.61
12906) sh cpu=15 start=183.64 finish=278.19
12907) bash cpu=15 start=183.64 finish=278.19
12908) perlbench_r_bas cpu=15 start=183.65 finish=278.17
12909) sh cpu=10 start=183.79 finish=280.01
12910) bash cpu=10 start=183.79 finish=280.01
12911) perlbench_r_bas cpu=10 start=183.79 finish=280.00
12912) sh cpu=2 start=183.88 finish=278.49
12913) bash cpu=2 start=183.88 finish=278.49
12914) perlbench_r_bas cpu=2 start=183.89 finish=278.48
12915) sh cpu=7 start=184.17 finish=278.86
12916) bash cpu=7 start=184.17 finish=278.86
12917) perlbench_r_bas cpu=7 start=184.17 finish=278.85
12918) sh cpu=4 start=184.26 finish=278.69
12919) bash cpu=4 start=184.26 finish=278.69
12920) perlbench_r_bas cpu=4 start=184.26 finish=278.68
12921) sh cpu=12 start=184.34 finish=278.65
12922) bash cpu=12 start=184.35 finish=278.65
12923) perlbench_r_bas cpu=12 start=184.35 finish=278.64
12924) sh cpu=8 start=184.46 finish=279.29
12925) bash cpu=8 start=184.46 finish=279.29
12926) perlbench_r_bas cpu=8 start=184.46 finish=279.28
12927) sh cpu=3 start=184.63 finish=278.84
12928) bash cpu=3 start=184.63 finish=278.84
12929) perlbench_r_bas cpu=3 start=184.63 finish=278.83
12930) sh cpu=9 start=184.66 finish=279.02
12931) bash cpu=9 start=184.66 finish=279.02
12932) perlbench_r_bas cpu=9 start=184.66 finish=279.01
12933) sh cpu=1 start=184.93 finish=279.64
12934) bash cpu=1 start=184.93 finish=279.64
12935) perlbench_r_bas cpu=1 start=184.93 finish=279.62
12936) sh cpu=5 start=187.82 finish=282.27
12937) bash cpu=5 start=187.83 finish=282.27
12938) perlbench_r_bas cpu=5 start=187.83 finish=282.26
12939) sh cpu=13 start=187.88 finish=282.54
12940) bash cpu=13 start=187.88 finish=282.53
12941) perlbench_r_bas cpu=13 start=187.88 finish=282.52
12942) sh cpu=14 start=190.94 finish=285.52
12944) bash cpu=14 start=190.94 finish=285.52
12947) perlbench_r_bas cpu=14 start=190.94 finish=285.50
12943) sh cpu=6 start=190.94 finish=285.98
12945) bash cpu=6 start=190.94 finish=285.98
12946) perlbench_r_bas cpu=6 start=190.94 finish=285.97
12948) sh cpu=11 start=277.85 finish=421.37
12949) bash cpu=11 start=277.85 finish=421.37
12950) perlbench_r_bas cpu=11 start=277.85 finish=421.36
12951) sh cpu=15 start=278.19 finish=422.62
12952) bash cpu=15 start=278.19 finish=422.62
12953) perlbench_r_bas cpu=15 start=278.19 finish=422.61
12954) sh cpu=2 start=278.49 finish=421.35
12955) bash cpu=2 start=278.50 finish=421.35
12956) perlbench_r_bas cpu=2 start=278.50 finish=421.34
12957) sh cpu=0 start=278.63 finish=422.26
12958) bash cpu=0 start=278.63 finish=422.26
12959) perlbench_r_bas cpu=0 start=278.63 finish=422.25
12960) sh cpu=12 start=278.65 finish=422.32
12961) bash cpu=12 start=278.65 finish=422.32
12962) perlbench_r_bas cpu=12 start=278.66 finish=422.31
12963) sh cpu=4 start=278.69 finish=422.31
12964) bash cpu=4 start=278.70 finish=422.31
12965) perlbench_r_bas cpu=4 start=278.70 finish=422.30
12966) sh cpu=3 start=278.84 finish=422.38
12967) bash cpu=3 start=278.85 finish=422.38
12968) perlbench_r_bas cpu=3 start=278.85 finish=422.37
12969) sh cpu=7 start=278.86 finish=422.89
12970) bash cpu=7 start=278.86 finish=422.89
12971) perlbench_r_bas cpu=7 start=278.87 finish=422.88
12972) sh cpu=9 start=279.02 finish=421.74
12973) bash cpu=9 start=279.03 finish=421.74
12974) perlbench_r_bas cpu=9 start=279.03 finish=421.73
12975) sh cpu=8 start=279.29 finish=422.45
12976) bash cpu=8 start=279.29 finish=422.45
12977) perlbench_r_bas cpu=8 start=279.30 finish=422.44
12978) sh cpu=1 start=279.64 finish=422.96
12979) bash cpu=1 start=279.64 finish=422.96
12980) perlbench_r_bas cpu=1 start=279.65 finish=422.95
12981) sh cpu=10 start=280.01 finish=422.42
12982) bash cpu=10 start=280.01 finish=422.42
12983) perlbench_r_bas cpu=10 start=280.01 finish=422.42
12984) sh cpu=5 start=282.27 finish=426.79
12985) bash cpu=5 start=282.27 finish=426.79
12986) perlbench_r_bas cpu=5 start=282.28 finish=426.79
12987) sh cpu=13 start=282.54 finish=426.17
12988) bash cpu=13 start=282.54 finish=426.17
12989) perlbench_r_bas cpu=13 start=282.54 finish=426.16
12990) sh cpu=14 start=285.52 finish=428.38
12991) bash cpu=14 start=285.52 finish=428.38
12992) perlbench_r_bas cpu=14 start=285.52 finish=428.38
12993) sh cpu=6 start=285.98 finish=428.15
12994) bash cpu=6 start=285.99 finish=428.15
12995) perlbench_r_bas cpu=6 start=285.99 finish=428.14