<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Hello Everyone,<br></div><div class="gmail_quote"><div dir="ltr"><div style="font-family:verdana,sans-serif"><br>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:</div><div style="font-family:verdana,sans-serif"><br></div><div style="font-family:verdana,sans-serif"><font size="1">osc.hasanfs-OST0000-osc-ffff882fcf777000.rpc_stats=<br>snapshot_time: 1632483604.967291 (secs.usecs)<br>read RPCs in flight: 0<br>write RPCs in flight: 0<br>pending write pages: 0<br>pending read pages: 0<br><br> read write<br>pages per rpc rpcs % cum % | rpcs % cum %<br>1: 1 100 100 | 0 0 0<br>2: 0 0 100 | 0 0 0<br>4: 0 0 100 | 0 0 0<br>8: 0 0 100 | 0 0 0<br>16: 0 0 100 | 0 0 0<br>32: 0 0 100 | 0 0 0<br>64: 0 0 100 | 0 0 0<br>128: 0 0 100 | 0 0 0<br>256: 0 0 100 | 9508 100 100<br><br> read write<br>rpcs in flight rpcs % cum % | rpcs % cum %<br>0: 0 0 0 | 0 0 0<br>1: 1 100 100 | 10 0 0<br>2: 0 0 100 | 9033 95 95<br>3: 0 0 100 | 465 4 100<br><br> read write<br>offset rpcs % cum % | rpcs % cum %<br>0: 1 100 100 | 725 7 7<br>1: 0 0 100 | 0 0 7<br>2: 0 0 100 | 0 0 7<br>4: 0 0 100 | 0 0 7<br>8: 0 0 100 | 0 0 7<br>16: 0 0 100 | 0 0 7<br>32: 0 0 100 | 0 0 7<br>64: 0 0 100 | 0 0 7<br>128: 0 0 100 | 0 0 7<br>256: 0 0 100 | 718 7 15<br>512: 0 0 100 | 1386 14 29<br>1024: 0 0 100 | 2205 23 52<br>2048: 0 0 100 | 1429 15 67<br>4096: 0 0 100 | 1103 11 79<br>8192: 0 0 100 | 1942 20 100</font><br></div><div style="font-family:verdana,sans-serif"><br></div><div style="font-family:verdana,sans-serif">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?</div><div style="font-family:verdana,sans-serif"><br></div><div style="font-family:verdana,sans-serif">Thanks,<br>Md. Hasanur Rashid</div></div>
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