Hi All, Could you kindly help me understand the cpu% reported in FIO output. I'm using a dat file with the following global parameters. [global] buffered=1 bs=128k iodepth=16 numjobs=1 group_reporting=1 size=2000m rw=read runtime=180 time_based and in the result I get something like this cpu : usr=0.08%, sys=98.63%, ctx=46607, majf=0, minf=768 and I monitor the system level utilization using vmstat and they point to different values ( lesser values). Looking at the code I see that fio does cpu% as cpu_time( from rusage) / total elapsed time. In the above case I have 128 jobfiles running. Does fio add the cpu_time of all threads and then divide by elapsed time ( ~180s) ? Kindly correct me if I'm wrong. Thanks. ~Puvi -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
