== sanity test 101a: check read-ahead for random reads === 13:03:12 (1780333392) nreads: 10000 file size: 96MB 143.961054s, 4.55234MB/s osc.lustre-OST0000-osc-ffff920bc4a14800.rpc_stats= snapshot_time: 1780333555.318679729 secs.nsecs start_time: 1780333394.306964968 secs.nsecs elapsed_time: 161.011714761 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 66 66 2: 0 0 0 | 0 0 66 4: 0 0 0 | 0 0 66 8: 0 0 0 | 1 33 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 66 66 2: 0 0 0 | 1 33 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 3 100 100 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 33 33 16384: 0 0 0 | 0 0 33 32768: 0 0 0 | 0 0 33 65536: 0 0 0 | 2 66 100 osc.lustre-OST0001-osc-ffff920bc4a14800.rpc_stats= snapshot_time: 1780333555.318767574 secs.nsecs start_time: 1780333394.307002593 secs.nsecs elapsed_time: 161.011764981 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 1 1 2: 2 0 0 | 0 0 1 4: 0 0 0 | 0 0 1 8: 1 0 0 | 0 0 1 16: 5038 99 100 | 0 0 1 32: 0 0 100 | 0 0 1 64: 0 0 100 | 0 0 1 128: 0 0 100 | 0 0 1 256: 0 0 100 | 100 98 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5041 100 100 | 100 98 98 2: 0 0 100 | 1 0 99 3: 0 0 100 | 1 0 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 3 2 2 1: 0 0 0 | 0 0 2 2: 0 0 0 | 0 0 2 4: 0 0 0 | 0 0 2 8: 0 0 0 | 0 0 2 16: 4 0 0 | 0 0 2 32: 6 0 0 | 0 0 2 64: 16 0 0 | 0 0 2 128: 26 0 1 | 0 0 2 256: 53 1 2 | 1 0 3 512: 106 2 4 | 2 1 5 1024: 208 4 8 | 4 3 9 2048: 430 8 16 | 8 7 17 4096: 853 16 33 | 16 15 33 8192: 1671 33 66 | 32 31 64 16384: 1665 33 100 | 36 35 100 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: 527 10 10 | 0 0 0 8192: 2762 54 65 | 3 2 2 16384: 1638 32 97 | 48 47 50 32768: 228 4 102 | 48 47 97 65536: 5 0 102 | 5 4 101 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-ffff920bc4a14800.read_ahead_stats= snapshot_time 1780333555.331760920 secs.nsecs start_time 1780333394.328054786 secs.nsecs elapsed_time 161.003706134 secs.nsecs hits 75563 samples [pages] misses 5041 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75563 samples [pages] failed_to_fast_read 5041 samples [pages] readahead_pages 5041 samples [pages] 1 15 75563