== sanity test 101a: check read-ahead for random reads === 23:31:25 (1773199885) nreads: 10000 file size: 96MB 180.168850s, 2.98164MB/s osc.lustre-OST0000-osc-ffff9ffe51152000.rpc_stats= snapshot_time: 1773200088.096067437 secs.nsecs start_time: 1773199887.063713066 secs.nsecs elapsed_time: 201.032354371 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 | 2 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 2 100 100 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 | 1 50 50 16384: 0 0 0 | 1 50 100 osc.lustre-OST0001-osc-ffff9ffe51152000.rpc_stats= snapshot_time: 1773200088.096141136 secs.nsecs start_time: 1773199887.063749076 secs.nsecs elapsed_time: 201.032392060 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 | 2 7 7 2: 3 0 0 | 0 0 7 4: 4 0 0 | 0 0 7 8: 4 0 0 | 1 3 10 16: 5491 99 100 | 0 0 10 32: 0 0 100 | 0 0 10 64: 0 0 100 | 0 0 10 128: 0 0 100 | 0 0 10 256: 0 0 100 | 0 0 10 512: 0 0 100 | 0 0 10 1024: 0 0 100 | 25 89 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5502 100 100 | 26 92 92 2: 0 0 100 | 1 3 96 3: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 4 14 14 1: 0 0 0 | 0 0 14 2: 0 0 0 | 0 0 14 4: 0 0 0 | 0 0 14 8: 0 0 0 | 0 0 14 16: 5 0 0 | 0 0 14 32: 6 0 0 | 0 0 14 64: 18 0 0 | 0 0 14 128: 26 0 1 | 0 0 14 256: 53 0 2 | 0 0 14 512: 116 2 4 | 0 0 14 1024: 209 3 7 | 1 3 17 2048: 472 8 16 | 2 7 25 4096: 903 16 32 | 4 14 39 8192: 1785 32 65 | 8 28 67 16384: 1904 34 100 | 9 32 100 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: 289 5 5 | 0 0 0 8192: 2907 52 58 | 0 0 0 16384: 2011 36 94 | 2 7 7 32768: 409 7 102 | 1 3 10 65536: 16 0 102 | 24 85 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 llite.lustre-ffff9ffe51152000.read_ahead_stats= snapshot_time 1773200088.104222646 secs.nsecs start_time 1773199887.087049122 secs.nsecs elapsed_time 201.017173524 secs.nsecs hits 82362 samples [pages] misses 5502 samples [pages] readpage_not_consecutive 8192 samples [pages] zero_size_window 82362 samples [pages] failed_to_fast_read 5502 samples [pages] readahead_pages 5502 samples [pages] 1 15 82362