Perf improvements with concurrent hash calculation ================================================= Using the source code dataset here are the new perfs: ``` 254 541,85 msec task-clock # 1,333 CPUs utilized 489 390 context-switches # 0,002 M/sec 14 491 cpu-migrations # 0,057 K/sec 109 170 page-faults # 0,429 K/sec 702 598 342 141 cycles # 2,760 GHz 1 191 229 091 705 instructions # 1,70 insn per cycle 172 579 644 365 branches # 678,001 M/sec 2 502 920 412 branch-misses # 1,45% of all branches 191,024430360 seconds time elapsed 247,992304000 seconds user 15,759037000 seconds sys ``` But this time I also had the good idea to close all my processes and to use a tmp directory for writing. ------------------------------------------------------------------------------- With the same setup, the previous perf was: ``` 277 665,78 msec task-clock # 1,411 CPUs utilized 853 639 context-switches # 0,003 M/sec 27 276 cpu-migrations # 0,098 K/sec 110 187 page-faults # 0,397 K/sec 764 443 227 093 cycles # 2,753 GHz 1 221 696 199 089 instructions # 1,60 insn per cycle 178 891 873 274 branches # 644,271 M/sec 2 578 200 052 branch-misses # 1,44% of all branches 196,744991354 seconds time elapsed 270,030535000 seconds user 18,285378000 seconds sys ``` So not that big of an improvement, but it seems that at the same time CPU usage has decreased a bit. Maybe because less synchronization calls were made ? />
path: root/lib/omittable.h
blob: b5efecf58108e008ac910e233a6c1c555dea18d5 (plain) 
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