== sanity test 101a: check read-ahead for random reads === 10:12:58 (1761142378) nreads: 10000 file size: 96MB 48.443902s, 13.5282MB/s osc.lustre-OST0000-osc-ffff90328a63f800.rpc_stats= snapshot_time: 1761142436.052401750 secs.nsecs start_time: 1761142379.332232272 secs.nsecs elapsed_time: 56.720169478 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 | 1 33 33 2: 0 0 0 | 2 66 100 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 | 1 33 33 4096: 0 0 0 | 1 33 66 8192: 0 0 0 | 1 33 100 osc.lustre-OST0001-osc-ffff90328a63f800.rpc_stats= snapshot_time: 1761142436.052458095 secs.nsecs start_time: 1761142379.332282537 secs.nsecs elapsed_time: 56.720175558 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: 4 0 0 | 2 1 1 2: 2 0 0 | 0 0 1 4: 5 0 0 | 0 0 1 8: 6 0 0 | 0 0 1 16: 4991 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: 5008 100 100 | 101 99 99 2: 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: 5 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: 52 1 2 | 1 0 3 512: 107 2 4 | 2 1 5 1024: 206 4 8 | 4 3 9 2048: 430 8 16 | 8 7 17 4096: 856 17 34 | 16 15 33 8192: 1670 33 67 | 32 31 64 16384: 1631 32 100 | 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: 6 0 0 | 0 0 0 2048: 4229 84 84 | 0 0 0 4096: 879 17 102 | 93 91 91 8192: 13 0 102 | 11 10 101 16384: 0 0 102 | 0 0 101 32768: 0 0 102 | 0 0 101 65536: 0 0 102 | 0 0 101 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-ffff90328a63f800.read_ahead_stats= snapshot_time 1761142436.059911771 secs.nsecs start_time 1761142379.338770432 secs.nsecs elapsed_time 56.721141339 secs.nsecs hits 74871 samples [pages] misses 5008 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 74875 samples [pages] failed_to_fast_read 5008 samples [pages] readahead_pages 5004 samples [pages] 1 15 74871