== sanity test 101a: check read-ahead for random reads === 23:18:11 (1788837491) nreads: 10000 file size: 96MB 180.075616s, 3.53527MB/s osc.lustre-OST0000-osc-ffff918cd1407800.rpc_stats= snapshot_time: 1788837690.082648975 secs.nsecs start_time: 1788837493.230958715 secs.nsecs elapsed_time: 196.851690260 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 | 0 0 0 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 0 0 0 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 0 0 0 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 osc.lustre-OST0001-osc-ffff918cd1407800.rpc_stats= snapshot_time: 1788837690.082716738 secs.nsecs start_time: 1788837493.231008610 secs.nsecs elapsed_time: 196.851708128 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 | 0 0 0 2: 1 0 0 | 0 0 0 4: 1 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 4897 99 100 | 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 | 100 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4903 100 100 | 100 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 1 1 1 1: 0 0 0 | 0 0 1 2: 0 0 0 | 0 0 1 4: 0 0 0 | 0 0 1 8: 0 0 0 | 0 0 1 16: 4 0 0 | 0 0 1 32: 6 0 0 | 0 0 1 64: 16 0 0 | 0 0 1 128: 26 0 1 | 0 0 1 256: 50 1 2 | 1 1 2 512: 105 2 4 | 2 2 4 1024: 204 4 8 | 4 4 8 2048: 417 8 16 | 8 8 16 4096: 825 16 33 | 16 16 32 8192: 1627 33 66 | 32 32 64 16384: 1620 33 100 | 36 36 100 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: 54 1 1 | 0 0 0 8192: 2004 40 41 | 3 3 3 16384: 2350 47 89 | 46 46 49 32768: 584 11 101 | 48 48 97 65536: 26 0 102 | 5 5 102 131072: 0 0 102 | 0 0 102 262144: 0 0 102 | 0 0 102 524288: 0 0 102 | 0 0 102 1048576: 0 0 102 | 0 0 102 2097152: 0 0 102 | 0 0 102 4194304: 0 0 102 | 0 0 102 8388608: 0 0 102 | 0 0 102 16777216: 0 0 102 | 0 0 102 33554432: 0 0 102 | 0 0 102 67108864: 0 0 102 | 0 0 102 134217728: 0 0 102 | 0 0 102 268435456: 0 0 102 | 0 0 102 536870912: 0 0 102 | 0 0 102 1073741824: 0 0 102 | 0 0 102 llite.lustre-ffff918cd1407800.read_ahead_stats= snapshot_time 1788837690.105405014 secs.nsecs start_time 1788837493.266583236 secs.nsecs elapsed_time 196.838821778 secs.nsecs hits 73468 samples [pages] misses 4903 samples [pages] readpage_not_consecutive 9706 samples [pages] zero_size_window 73468 samples [pages] failed_to_fast_read 4903 samples [pages] readahead_pages 4903 samples [pages] 1 15 73468