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Benchmark individuel des noyaux?

Comment puis-je comparer des cœurs individuels? Je veux voir s'ils fonctionnent tous à la même vitesse. Je suis un peu confus si mon appareil Cortex A53 a big.LITTLE ou non, je lis des informations contradictoires sur Internet, je souhaite donc les tester moi-même.

cpuarmbenchmarks
1
ycomp

Je pense que ce commentaire de @ doug-smythies répond à la question.

Cependant, je me suis rendu compte juste pour voir si tous les processeurs fonctionnaient au même niveau - je pouvais le faire:

1 unité centrale

root@amlogic:~# stress-ng --cpu 1 --cpu-method matrixprod  --metrics-brief --perf -t 10
stress-ng: info:  [5921] dispatching hogs: 1 cpu
stress-ng: info:  [5921] cache allocate: using built-in defaults as unable to determine cache details
stress-ng: info:  [5921] cache allocate: default cache size: 2048K
stress-ng: info:  [5921] successful run completed in 10.94s
stress-ng: info:  [5921] stressor      bogo ops real time  usr time  sys time   bogo ops/s   bogo ops/s
stress-ng: info:  [5921]                          (secs)    (secs)    (secs)   (real time) (usr+sys time)
stress-ng: info:  [5921] cpu                 21     10.93     10.02      0.02         1.92         2.09
stress-ng: info:  [5921] cpu:
stress-ng: info:  [5921]             14,108,856,703 CPU Cycles                     1.29 B/sec
stress-ng: info:  [5921]             13,710,373,770 Instructions                   1.25 B/sec (0.972 instr. per cycle)
stress-ng: info:  [5921]                927,478,656 Cache References              84.76 M/sec
stress-ng: info:  [5921]                 43,400,148 Cache Misses                   3.97 M/sec ( 4.68%)
stress-ng: info:  [5921]                 36,225,340 Branch Misses                  3.31 M/sec ( 0.00%)

4 CPU

root@amlogic:~# stress-ng --cpu 4 --cpu-method matrixprod  --metrics-brief --perf -t 10
stress-ng: info:  [5867] dispatching hogs: 4 cpu
stress-ng: info:  [5867] cache allocate: using built-in defaults as unable to determine cache details
stress-ng: info:  [5867] cache allocate: default cache size: 2048K
stress-ng: info:  [5867] successful run completed in 11.56s
stress-ng: info:  [5867] stressor      bogo ops real time  usr time  sys time   bogo ops/s   bogo ops/s
stress-ng: info:  [5867]                          (secs)    (secs)    (secs)   (real time) (usr+sys time)
stress-ng: info:  [5867] cpu                 51     10.80     41.05      0.47         4.72         1.23
stress-ng: info:  [5867] cpu:
stress-ng: info:  [5867]             59,953,532,588 CPU Cycles                     5.19 B/sec
stress-ng: info:  [5867]             31,357,210,848 Instructions                   2.71 B/sec (0.523 instr. per cycle)
stress-ng: info:  [5867]              2,127,678,244 Cache References               0.18 B/sec
stress-ng: info:  [5867]                101,073,952 Cache Misses                   8.75 M/sec ( 4.75%)
stress-ng: info:  [5867]                 82,805,524 Branch Misses                  7.17 M/sec ( 0.00%)

8 CPU

root@amlogic:~# stress-ng --cpu 8 --cpu-method matrixprod  --metrics-brief --perf -t 10
stress-ng: info:  [5892] dispatching hogs: 8 cpu
stress-ng: info:  [5892] cache allocate: using built-in defaults as unable to determine cache details
stress-ng: info:  [5892] cache allocate: default cache size: 2048K
stress-ng: info:  [5892] successful run completed in 11.53s
stress-ng: info:  [5892] stressor      bogo ops real time  usr time  sys time   bogo ops/s   bogo ops/s
stress-ng: info:  [5892]                          (secs)    (secs)    (secs)   (real time) (usr+sys time)
stress-ng: info:  [5892] cpu                126     10.50     81.49      0.58        12.00         1.54
stress-ng: info:  [5892] cpu:
stress-ng: info:  [5892]            118,145,351,216 CPU Cycles                    10.24 B/sec
stress-ng: info:  [5892]             94,066,812,704 Instructions                   8.16 B/sec (0.796 instr. per cycle)
stress-ng: info:  [5892]              6,383,299,240 Cache References               0.55 B/sec
stress-ng: info:  [5892]                304,757,784 Cache Misses                  26.43 M/sec ( 4.77%)
stress-ng: info:  [5892]                248,569,352 Branch Misses                 21.55 M/sec ( 0.00%)
0
ycomp

(Je suppose que vous avez un processeur avec plusieurs cœurs qui ont chacun plusieurs threads)

Vous pouvez utiliser un outil nommé sysbench.

Installez-le avec Sudo apt-get install sysbench

Par défaut, cela teste un seul thread.

sysbench --test=cpu run

ou

sysbench --test=threads --num-threads=1 --thread-locks=1 run

Mais je n'arrive pas à comprendre comment le verrouiller à un fil spécifique. Quelqu'un?

Vous pouvez l'essayer vous-même en lisant les pages de manuel:

man sysbench
1
urben