Testing the draco library which compresses/decompresses 3d geometric meshes and point clouds. There are two workloads. The benchmark looks to be single-threaded and runs quickly.
Topdown profile is sparse but has a few more backend stalls than other stalls.
AMD metrics show this as memory-bound with a moderate L2 access but high L2 miss rate. Opcache and icache misses are lower as is the overall amount of frontend stalls. There is a high number of page faults suggesting a larger image.
elapsed 77.962
on_cpu 0.036 # 0.57 / 16 cores
utime 40.788
stime 4.022
nvcsw 2043 # 83.73%
nivcsw 397 # 16.27%
inblock 104 # 1.33/sec
onblock 80032 # 1026.55/sec
cpu-clock 44838944612 # 44.839 seconds
task-clock 44842022604 # 44.842 seconds
page faults 1795046 # 40030.442/sec
context switches 2648 # 59.052/sec
cpu migrations 255 # 5.687/sec
major page faults 2 # 0.045/sec
minor page faults 1795044 # 40030.398/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 33523335325 # 148.823 branches per 1000 inst
branch misses 732131582 # 2.18% branch miss
conditional 23698905001 # 105.209 conditional branches per 1000 inst
indirect 1555350390 # 6.905 indirect branches per 1000 inst
cpu-cycles 196511308061 # 0.16 GHz
instructions 224485305110 # 1.14 IPC
slots 395880545292 #
retiring 75548253138 # 19.1% (19.1%)
-- ucode 94125257 # 0.0%
-- fastpath 75454127881 # 19.1%
frontend 37847893235 # 9.6% ( 9.6%)
-- latency 26504030406 # 6.7%
-- bandwidth 11343862829 # 2.9%
backend 259262254091 # 65.5% (65.5%)
-- cpu 22063845225 # 5.6%
-- memory 237198408866 # 59.9%
speculation 23140243395 # 5.8% ( 5.8%)
-- branch mispredict 22566641443 # 5.7%
-- pipeline restart 573601952 # 0.1%
smt-contention 81622036 # 0.0% ( 0.0%)
cpu-cycles 196873203387 # 0.15 GHz
instructions 223740459677 # 1.14 IPC
instructions 74815515355 # 16.773 l2 access per 1000 inst
l2 hit from l1 867622158 # 54.20% l2 miss
l2 miss from l1 385079902 #
l2 hit from l2 pf 92216461 #
l3 hit from l2 pf 84717755 #
l3 miss from l2 pf 210321243 #
instructions 74852913626 # 97.722 float per 1000 inst
float 512 65 # 0.000 AVX-512 per 1000 inst
float 256 596 # 0.000 AVX-256 per 1000 inst
float 128 7314742792 # 97.722 AVX-128 per 1000 inst
float MMX 0 # 0.000 MMX per 1000 inst
float scalar 0 # 0.000 scalar per 1000 inst
instructions 224508389933 #
opcache 46644408269 # 207.762 opcache per 1000 inst
opcache miss 2316394861 # 5.0% opcache miss rate
l1 dTLB miss 901995710 # 4.018 L1 dTLB per 1000 inst
l2 dTLB miss 428419600 # 1.908 L2 dTLB per 1000 inst
instructions 224518696767 #
icache 5188957924 # 23.111 icache per 1000 inst
icache miss 247155351 # 4.8% icache miss rate
l1 iTLB miss 8246787 # 0.037 L1 iTLB per 1000 inst
l2 iTLB miss 0 # 0.000 L2 iTLB per 1000 inst
tlb flush 17624 # 0.000 TLB flush per 1000 inst
Intel metrics confirm this as a dram bound application.
elapsed 78.459
on_cpu 0.035 # 0.56 / 16 cores
utime 41.446
stime 2.806
nvcsw 2144 # 87.51%
nivcsw 306 # 12.49%
inblock 381824 # 4866.55/sec
onblock 68792 # 876.79/sec
cpu-clock 44260949968 # 44.261 seconds
task-clock 44264376235 # 44.264 seconds
page faults 1785230 # 40331.078/sec
context switches 2664 # 60.184/sec
cpu migrations 286 # 6.461/sec
major page faults 43 # 0.971/sec
minor page faults 1785187 # 40330.106/sec
alignment faults 0 # 0.000/sec
emulation faults 0 # 0.000/sec
branches 32716277551 # 146.506 branches per 1000 inst
branch misses 461064056 # 1.41% branch miss
conditional 32716289647 # 146.506 conditional branches per 1000 inst
indirect 1555729043 # 6.967 indirect branches per 1000 inst
slots 860942765204 #
retiring 217875645299 # 25.3% (25.3%)
-- ucode 14864431684 # 1.7%
-- fastpath 203011213615 # 23.6%
frontend 47874051035 # 5.6% ( 5.6%)
-- latency 22289417139 # 2.6%
-- bandwidth 25584633896 # 3.0%
backend 493844325597 # 57.4% (57.4%)
-- cpu 134378018395 # 15.6%
-- memory 359466307202 # 41.8%
speculation 104189435651 # 12.1% (12.1%) high
-- branch mispredict 101968937864 # 11.8%
-- pipeline restart 2220497787 # 0.3%
smt-contention 0 # 0.0% ( 0.0%)
cpu-cycles 143952942248 # 0.11 GHz
instructions 222454692992 # 1.55 IPC
l2 access 6186401409 # 27.816 l2 access per 1000 inst
l2 miss 4300814427 # 69.52% l2 miss
cpu-cycles 143931637736 # 46.2% memory latency
load stalls 64714460372 # 0.0% l1 bound
l1 miss 77055639785 # 13.1% l2 bound
l2 miss 58150653301 # 5.4% l3 bound
l3 miss 50425863737 # 35.0% dram bound
store_stalls 1809094793 # 1.3% store bound
Process information shows draco_encoder as the primary user application but also a higher percentage of test overhead.
362 processes
6 draco_encoder 39.71 3.01
68 clinfo 16.71 5.99
38 vulkaninfo 1.72 0.95
4 vulkani:disk$0 0.18 0.10
6 glxinfo:gdrv0 0.14 0.02
6 glxinfo:gl0 0.14 0.02
2 llvmpipe-0 0.09 0.05
2 llvmpipe-1 0.09 0.05
2 llvmpipe-10 0.09 0.05
2 llvmpipe-11 0.09 0.05
2 llvmpipe-12 0.09 0.05
2 llvmpipe-13 0.09 0.05
2 llvmpipe-14 0.09 0.05
2 llvmpipe-15 0.09 0.05
2 llvmpipe-2 0.09 0.05
2 llvmpipe-3 0.09 0.05
2 llvmpipe-4 0.09 0.05
2 llvmpipe-5 0.09 0.05
2 llvmpipe-6 0.09 0.05
2 llvmpipe-7 0.09 0.05
2 llvmpipe-8 0.09 0.05
2 llvmpipe-9 0.09 0.05
6 php 0.07 0.08
2 glxinfo 0.06 0.02
2 glxinfo:cs0 0.06 0.02
2 glxinfo:disk$0 0.06 0.02
2 glxinfo:sh0 0.06 0.02
2 glxinfo:shlo0 0.06 0.02
6 clang 0.03 0.09
3 rocminfo 0.03 0.00
1 lspci 0.00 0.02
84 sh 0.00 0.00
13 gcc 0.00 0.00
13 gsettings 0.00 0.00
8 stat 0.00 0.00
8 systemd-detect- 0.00 0.00
6 draco 0.00 0.00
6 llvm-link 0.00 0.00
5 phoronix-test-s 0.00 0.00
2 cc 0.00 0.00
2 gmain 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
Computation structure
59852) draco cpu=14 start=5.59 finish=11.96
59853) draco_encoder cpu=4 start=5.59 finish=11.95
59856) draco cpu=11 start=15.96 finish=22.34
59857) draco_encoder cpu=12 start=15.97 finish=22.32
59858) draco cpu=11 start=26.34 finish=32.71
59859) draco_encoder cpu=4 start=26.34 finish=32.70
59860) sh cpu=11 start=32.71 finish=32.71
59861) sh cpu=13 start=32.71 finish=32.71
59862) draco cpu=11 start=42.89 finish=50.82
59863) draco_encoder cpu=4 start=42.90 finish=50.81
59864) draco cpu=11 start=54.83 finish=62.73
59865) draco_encoder cpu=4 start=54.83 finish=62.72
59866) draco cpu=11 start=66.73 finish=74.64
59867) draco_encoder cpu=4 start=66.74 finish=74.63