== sanity test 101a: check read-ahead for random reads === 19:04:08 (1788563048) nreads: 10000 file size: 96MB 180.187436s, 3.52181MB/s osc.lustre-OST0000-osc-ffff919577850000.rpc_stats= snapshot_time: 1788563248.153957885 secs.nsecs start_time: 1788563051.044037349 secs.nsecs elapsed_time: 197.109920536 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-ffff919577850000.rpc_stats= snapshot_time: 1788563248.154033965 secs.nsecs start_time: 1788563051.044071944 secs.nsecs elapsed_time: 197.109962021 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: 1 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 2 0 0 | 0 0 0 8: 9 0 0 | 0 0 0 16: 4873 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: 4885 100 100 | 93 93 93 2: 0 0 100 | 7 7 100 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: 103 2 4 | 2 2 4 1024: 204 4 8 | 4 4 8 2048: 412 8 16 | 8 8 16 4096: 823 16 33 | 16 16 32 8192: 1620 33 66 | 32 32 64 16384: 1618 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: 231 4 4 | 0 0 0 8192: 2026 41 46 | 1 1 1 16384: 2023 41 87 | 20 20 21 32768: 670 13 101 | 66 66 87 65536: 48 0 102 | 12 12 99 131072: 1 0 102 | 2 2 101 262144: 1 0 102 | 0 0 101 524288: 0 0 102 | 0 0 101 1048576: 0 0 102 | 0 0 101 2097152: 0 0 102 | 0 0 101 4194304: 0 0 102 | 0 0 101 8388608: 0 0 102 | 0 0 101 16777216: 0 0 102 | 0 0 101 33554432: 0 0 102 | 0 0 101 67108864: 0 0 102 | 0 0 101 134217728: 0 0 102 | 0 0 101 268435456: 0 0 102 | 0 0 101 536870912: 0 0 102 | 0 0 101 1073741824: 0 0 102 | 0 0 101 llite.lustre-ffff919577850000.read_ahead_stats= snapshot_time 1788563248.200384509 secs.nsecs start_time 1788563051.058671776 secs.nsecs elapsed_time 197.141712733 secs.nsecs hits 73120 samples [pages] misses 4885 samples [pages] readpage_not_consecutive 9675 samples [pages] zero_size_window 73121 samples [pages] failed_to_fast_read 4885 samples [pages] readahead_pages 4884 samples [pages] 2 15 73120