A JPEG compression/decompression benchmark. This reports as a single number of decompression throughput that runs in ~30 seconds. This test looks to be single-threaded.
Topdown metrics have a moderately high retirement rate with some backend stalls. There are also higher than average branch mis-predictions.
AMD metrics confirm this runs on one core. There is little floating point code. Only ~90 branches per 1000 instructions but still a 3% branch mis-prediction rate.
elapsed 90.610
on_cpu 0.053 # 0.85 / 16 cores
utime 75.875
stime 0.862
nvcsw 1770 # 76.92%
nivcsw 531 # 23.08%
inblock 0 # 0.00/sec
onblock 12648 # 139.59/sec
cpu-clock 76766383142 # 76.766 seconds
task-clock 76769375887 # 76.769 seconds
page faults 190680 # 2483.803/sec
context switches 2586 # 33.685/sec
cpu migrations 265 # 3.452/sec
major page faults 2 # 0.026/sec
minor page faults 190678 # 2483.777/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 93460735704 # 89.021 branches per 1000 inst
branch misses 3008416876 # 3.22% branch miss
conditional 86580033243 # 82.467 conditional branches per 1000 inst
indirect 1032761588 # 0.984 indirect branches per 1000 inst
cpu-cycles 351394771396 # 0.24 GHz
instructions 1050118967313 # 2.99 IPC
slots 704878734078 #
retiring 334650976850 # 47.5% (47.5%)
-- ucode 70653896 # 0.0%
-- fastpath 334580322954 # 47.5%
frontend 61203322757 # 8.7% ( 8.7%)
-- latency 47074633296 # 6.7%
-- bandwidth 14128689461 # 2.0%
backend 209972253736 # 29.8% (29.8%)
-- cpu 73322992101 # 10.4%
-- memory 136649261635 # 19.4%
speculation 98809174500 # 14.0% (14.0%) high
-- branch mispredict 98683006907 # 14.0%
-- pipeline restart 126167593 # 0.0%
smt-contention 242650350 # 0.0% ( 0.0%)
cpu-cycles 351908233616 # 0.24 GHz
instructions 1046603000920 # 2.97 IPC
instructions 349033167457 # 5.604 l2 access per 1000 inst
l2 hit from l1 1278995515 # 15.64% l2 miss
l2 miss from l1 34123235 #
l2 hit from l2 pf 405098336 #
l3 hit from l2 pf 24702013 #
l3 miss from l2 pf 247064594 #
instructions 349083448347 # 9.194 float per 1000 inst
float 512 80 # 0.000 AVX-512 per 1000 inst
float 256 674 # 0.000 AVX-256 per 1000 inst
float 128 3209459937 # 9.194 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 2 # 0.000 scalar per 1000 inst
instructions 1047363530640 #
opcache 175933785516 # 167.978 opcache per 1000 inst
opcache miss 686228671 # 0.4% opcache miss rate
l1 dTLB miss 39189917 # 0.037 L1 dTLB per 1000 inst
l2 dTLB miss 19063155 # 0.018 L2 dTLB per 1000 inst
instructions 1053405213672 #
icache 1421453866 # 1.349 icache per 1000 inst
icache miss 141139750 # 9.9% icache miss rate
l1 iTLB miss 904104 # 0.001 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 20701 # 0.000 TLB flush per 1000 inst
Intel metrics also show high branch mis-prediction.
elapsed 90.210
on_cpu 0.053 # 0.85 / 16 cores
utime 75.892
stime 0.420
nvcsw 1477 # 78.02%
nivcsw 416 # 21.98%
inblock 24 # 0.27/sec
onblock 1368 # 15.16/sec
cpu-clock 76324507443 # 76.325 seconds
task-clock 76326910376 # 76.327 seconds
page faults 147820 # 1936.670/sec
context switches 2174 # 28.483/sec
cpu migrations 189 # 2.476/sec
major page faults 0 # 0.000/sec
minor page faults 147820 # 1936.670/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 69225074899 # 88.832 branches per 1000 inst
branch misses 2127831269 # 3.07% branch miss
conditional 69225084755 # 88.832 conditional branches per 1000 inst
indirect 767701560 # 0.985 indirect branches per 1000 inst
slots 1729062295772 #
retiring 757616713936 # 43.8% (43.8%)
-- ucode 49787088500 # 2.9%
-- fastpath 707829625436 # 40.9%
frontend 84350730758 # 4.9% ( 4.9%) low
-- latency 44595436672 # 2.6%
-- bandwidth 39755294086 # 2.3%
backend 533296092080 # 30.8% (30.8%)
-- cpu 459462063373 # 26.6%
-- memory 73834028707 # 4.3%
speculation 362832053071 # 21.0% (21.0%) high
-- branch mispredict 362770144112 # 21.0%
-- pipeline restart 61908959 # 0.0%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 288157381870 # 0.20 GHz
instructions 779238641030 # 2.70 IPC
l2 access 3709656569 # 4.761 l2 access per 1000 inst
l2 miss 1548267647 # 41.74% l2 miss
cpu-cycles 288650034648 # 8.9% memory latency
load stalls 25393223674 # 8.2% l1 bound
l1 miss 1812571872 # 0.5% l2 bound
l2 miss 500138858 # 0.1% l3 bound
l3 miss 350603520 # 0.1% dram bound
store_stalls 325944469 # 0.1% store bound
Process overview shows everything as single invocations of tjbench
322 processes
6 tjbench 75.07 0.14
36 clinfo 3.94 2.08
38 vulkaninfo 1.33 1.15
4 vulkani:disk$0 0.14 0.13
6 glxinfo:gdrv0 0.09 0.07
6 glxinfo:gl0 0.09 0.07
6 php 0.08 0.05
2 llvmpipe-0 0.07 0.07
2 llvmpipe-1 0.07 0.07
2 llvmpipe-10 0.07 0.07
2 llvmpipe-11 0.07 0.07
2 llvmpipe-12 0.07 0.07
2 llvmpipe-13 0.07 0.07
2 llvmpipe-14 0.07 0.07
2 llvmpipe-15 0.07 0.07
2 llvmpipe-2 0.07 0.07
2 llvmpipe-3 0.07 0.07
2 llvmpipe-4 0.07 0.07
2 llvmpipe-5 0.07 0.07
2 llvmpipe-6 0.07 0.07
2 llvmpipe-7 0.07 0.07
2 llvmpipe-8 0.07 0.07
2 llvmpipe-9 0.07 0.07
6 clang 0.06 0.06
2 glxinfo 0.05 0.04
2 glxinfo:cs0 0.05 0.04
2 glxinfo:disk$0 0.05 0.04
2 glxinfo:sh0 0.05 0.04
2 glxinfo:shlo0 0.05 0.04
3 rocminfo 0.00 0.03
1 lspci 0.00 0.02
82 sh 0.00 0.00
13 gcc 0.00 0.00
12 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
3 gmain 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 ps 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
Very simple computation blocks
64403) tjbench cpu=3 start=5.45 finish=30.51
64404) tjbench cpu=13 start=5.45 finish=30.51
64409) tjbench cpu=0 start=34.51 finish=59.62
64410) tjbench cpu=1 start=34.52 finish=59.62
64412) tjbench cpu=0 start=63.62 finish=88.71
64413) tjbench cpu=1 start=63.62 finish=88.71