Hello Everyone, I am running the Filebench benchmark in my Lustre cluster. I set the max_rpcs_in_flight value to be 1. Before executing and after executing, I verified that the value of max_rpcs_in_flight is indeed 1. However, when I check the rpc_stats, the stat shows a much higher value for RPCs in flight. Following is the value shown for one OSC just for reference:
osc.hasanfs-OST0000-osc-ffff882fcf777000.rpc_stats= snapshot_time: 1632483604.967291 (secs.usecs) read RPCs in flight: 0 write RPCs in flight: 0 pending write pages: 0 pending read pages: 0 read write pages per rpc rpcs % cum % | rpcs % cum % 1: 1 100 100 | 0 0 0 2: 0 0 100 | 0 0 0 4: 0 0 100 | 0 0 0 8: 0 0 100 | 0 0 0 16: 0 0 100 | 0 0 0 32: 0 0 100 | 0 0 0 64: 0 0 100 | 0 0 0 128: 0 0 100 | 0 0 0 256: 0 0 100 | 9508 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 0: 0 0 0 | 0 0 0 1: 1 100 100 | 10 0 0 2: 0 0 100 | 9033 95 95 3: 0 0 100 | 465 4 100 read write offset rpcs % cum % | rpcs % cum % 0: 1 100 100 | 725 7 7 1: 0 0 100 | 0 0 7 2: 0 0 100 | 0 0 7 4: 0 0 100 | 0 0 7 8: 0 0 100 | 0 0 7 16: 0 0 100 | 0 0 7 32: 0 0 100 | 0 0 7 64: 0 0 100 | 0 0 7 128: 0 0 100 | 0 0 7 256: 0 0 100 | 718 7 15 512: 0 0 100 | 1386 14 29 1024: 0 0 100 | 2205 23 52 2048: 0 0 100 | 1429 15 67 4096: 0 0 100 | 1103 11 79 8192: 0 0 100 | 1942 20 100 Can anyone please explain to me why the RPCs in flight shown in the rpc_stats could be higher than the max_rpcs_in_flight? Thanks, Md. Hasanur Rashid
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