Hello ! Comparing the three systems tested:
raspibian raspberry pi3: 53us linux celeron: 12us os x i5: 7.7us One thing that I was expecting is that when using all core/threads (and because basically all data in in memory/cache) that I'll have around 100% cpu load but I don't, so there is something that is preventing usage of all system resources (cpu). On linux I set the threads scope to PTHREAD_SCOPE_SYSTEM (but it doesn't changed anything). Here is a snapshoot of top: %Cpu(s): 55.1 us,? 1.2 sy,? 0.0 ni, 43.4 id,? 0.3 wa,? 0.0 hi,? 0.0 si,? 0.0 st KiB Mem:?? 5953276 total,? 5562752 used,?? 390524 free,?? 404528 buffers KiB Swap: 12582908 total,?? 860748 used, 11722160 free.? 1396640 cached Mem ? PID USER????? PR? NI??? VIRT??? RES??? SHR S? %CPU %MEM???? TIME+ COMMAND???? 29115 xxxx ??? 20?? 0? 162800??? 928??? 832 S 100.7? 0.0?? 0:13.37 sqlite-wal+ ? And here is the output of /usr/bin/time: 7.63user 0.07system 0:08.00elapsed 96%CPU (0avgtext+0avgdata 2432maxresident)k 0inputs+0outputs (0major+238minor)pagefaults 0swaps What's missing here ? Can someone give an insight here ? Cheers ! ?
