== sanity test 101a: check read-ahead for random reads === 11:18:14 (1787584694) nreads: 10000 file size: 96MB 180.136358s, 3.12952MB/s osc.lustre-OST0000-osc-ffff923a7a903800.rpc_stats= snapshot_time: 1787584891.106341291 secs.nsecs start_time: 1787584695.855244562 secs.nsecs elapsed_time: 195.251096729 secs.nsecs read RPCs in flight: 0 write RPCs in flight: 0 DIO RPCs in flight: 0 pending write pages: 0 pending read pages: 0 read write pages per rpc rpcs % cum % | rpcs % cum % 1: 0 0 0 | 1 3 3 2: 0 0 0 | 0 0 3 4: 1 0 0 | 0 0 3 8: 6 0 0 | 0 0 3 16: 5679 99 100 | 0 0 3 32: 0 0 100 | 0 0 3 64: 0 0 100 | 0 0 3 128: 0 0 100 | 0 0 3 256: 0 0 100 | 0 0 3 512: 0 0 100 | 0 0 3 1024: 0 0 100 | 25 96 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5686 100 100 | 25 96 96 2: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 2 7 7 1: 0 0 0 | 0 0 7 2: 0 0 0 | 0 0 7 4: 0 0 0 | 0 0 7 8: 0 0 0 | 0 0 7 16: 4 0 0 | 0 0 7 32: 8 0 0 | 0 0 7 64: 15 0 0 | 0 0 7 128: 24 0 0 | 0 0 7 256: 60 1 2 | 0 0 7 512: 119 2 4 | 0 0 7 1024: 222 3 8 | 1 3 11 2048: 481 8 16 | 2 7 19 4096: 939 16 33 | 4 15 34 8192: 1874 32 65 | 8 30 65 16384: 1935 34 100 | 9 34 100 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 1: 0 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 0 0 0 | 0 0 0 16: 0 0 0 | 0 0 0 32: 0 0 0 | 0 0 0 64: 0 0 0 | 0 0 0 128: 0 0 0 | 0 0 0 256: 0 0 0 | 0 0 0 512: 0 0 0 | 0 0 0 1024: 0 0 0 | 0 0 0 2048: 0 0 0 | 0 0 0 4096: 305 5 5 | 0 0 0 8192: 2935 51 56 | 1 3 3 16384: 2164 38 95 | 0 0 3 32768: 403 7 102 | 5 19 23 65536: 13 0 102 | 19 73 96 131072: 0 0 102 | 1 3 100 262144: 0 0 102 | 0 0 100 524288: 0 0 102 | 0 0 100 1048576: 0 0 102 | 0 0 100 2097152: 0 0 102 | 0 0 100 4194304: 0 0 102 | 0 0 100 8388608: 0 0 102 | 0 0 100 16777216: 0 0 102 | 0 0 100 33554432: 0 0 102 | 0 0 100 67108864: 0 0 102 | 0 0 100 134217728: 0 0 102 | 0 0 100 268435456: 0 0 102 | 0 0 100 536870912: 0 0 102 | 0 0 100 1073741824: 0 0 102 | 0 0 100 osc.lustre-OST0001-osc-ffff923a7a903800.rpc_stats= snapshot_time: 1787584891.109781031 secs.nsecs start_time: 1787584695.855278509 secs.nsecs elapsed_time: 195.254502522 secs.nsecs read RPCs in flight: 0 write RPCs in flight: 0 DIO RPCs in flight: 0 pending write pages: 0 pending read pages: 0 read write pages per rpc rpcs % cum % | rpcs % cum % 1: 0 0 0 | 3 75 75 2: 0 0 0 | 0 0 75 4: 0 0 0 | 0 0 75 8: 0 0 0 | 1 25 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 50 50 2: 0 0 0 | 1 25 75 3: 0 0 0 | 1 25 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 4 100 100 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 1: 0 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 0 0 0 | 0 0 0 16: 0 0 0 | 0 0 0 32: 0 0 0 | 0 0 0 64: 0 0 0 | 0 0 0 128: 0 0 0 | 0 0 0 256: 0 0 0 | 0 0 0 512: 0 0 0 | 0 0 0 1024: 0 0 0 | 0 0 0 2048: 0 0 0 | 0 0 0 4096: 0 0 0 | 0 0 0 8192: 0 0 0 | 0 0 0 16384: 0 0 0 | 2 50 50 32768: 0 0 0 | 0 0 50 65536: 0 0 0 | 2 50 100 llite.lustre-ffff923a7a903800.read_ahead_stats= snapshot_time 1787584891.127015667 secs.nsecs start_time 1787584695.872286173 secs.nsecs elapsed_time 195.254729494 secs.nsecs hits 85189 samples [pages] misses 5686 samples [pages] readpage_not_consecutive 8597 samples [pages] zero_size_window 85189 samples [pages] failed_to_fast_read 5685 samples [pages] readahead_pages 5686 samples [pages] 3 15 85189