== sanity test 101a: check read-ahead for random reads === 10:42:07 (1788360127) nreads: 10000 file size: 96MB 99.024727s, 6.61814MB/s osc.lustre-OST0000-osc-ffff93cbd0578000.rpc_stats= snapshot_time: 1788360237.895480179 secs.nsecs start_time: 1788360128.694455570 secs.nsecs elapsed_time: 109.201024609 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-ffff93cbd0578000.rpc_stats= snapshot_time: 1788360237.895559759 secs.nsecs start_time: 1788360128.694504554 secs.nsecs elapsed_time: 109.201055205 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: 3 0 0 | 0 0 0 4: 4 0 0 | 0 0 0 8: 6 0 0 | 0 0 0 16: 5042 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: 5054 99 99 | 98 98 98 2: 1 0 100 | 2 2 100 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: 53 1 2 | 1 1 2 512: 109 2 4 | 2 2 4 1024: 206 4 8 | 4 4 8 2048: 427 8 16 | 8 8 16 4096: 855 16 33 | 16 16 32 8192: 1678 33 66 | 32 32 64 16384: 1672 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: 6 0 0 | 0 0 0 4096: 1591 31 31 | 0 0 0 8192: 3129 61 93 | 17 17 17 16384: 437 8 102 | 70 70 87 32768: 12 0 102 | 12 12 99 65536: 0 0 102 | 2 2 101 131072: 0 0 102 | 0 0 101 262144: 0 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-ffff93cbd0578000.read_ahead_stats= snapshot_time 1788360237.905579463 secs.nsecs start_time 1788360128.708221281 secs.nsecs elapsed_time 109.197358182 secs.nsecs hits 75674 samples [pages] misses 5055 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75674 samples [pages] failed_to_fast_read 5055 samples [pages] readahead_pages 5055 samples [pages] 1 15 75674