== sanity test 101a: check read-ahead for random reads === 18:19:51 (1786832391) nreads: 10000 file size: 96MB 179.432591s, 3.6524MB/s osc.lustre-OST0000-osc-ffff9d2192234000.rpc_stats= snapshot_time: 1786832591.307725406 secs.nsecs start_time: 1786832393.268915436 secs.nsecs elapsed_time: 198.038809970 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 | 1 3 3 2: 1 0 0 | 0 0 3 4: 4 0 0 | 0 0 3 8: 3 0 0 | 0 0 3 16: 6524 99 100 | 0 0 3 32: 0 0 100 | 0 0 3 64: 0 0 100 | 0 0 3 128: 0 0 100 | 0 0 3 256: 0 0 100 | 0 0 3 512: 0 0 100 | 0 0 3 1024: 0 0 100 | 25 96 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 6532 100 100 | 25 96 96 2: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 0 0 | 2 7 7 1: 0 0 0 | 0 0 7 2: 0 0 0 | 0 0 7 4: 0 0 0 | 0 0 7 8: 0 0 0 | 0 0 7 16: 5 0 0 | 0 0 7 32: 8 0 0 | 0 0 7 64: 19 0 0 | 0 0 7 128: 32 0 1 | 0 0 7 256: 72 1 2 | 0 0 7 512: 132 2 4 | 0 0 7 1024: 253 3 8 | 1 3 11 2048: 549 8 16 | 2 7 19 4096: 1069 16 32 | 4 15 34 8192: 2150 32 65 | 8 30 65 16384: 2237 34 100 | 9 34 100 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: 2 0 0 | 0 0 0 4096: 1016 15 15 | 0 0 0 8192: 3811 58 73 | 0 0 0 16384: 1632 24 98 | 1 3 3 32768: 214 3 102 | 7 26 30 65536: 12 0 102 | 16 61 92 131072: 0 0 102 | 2 7 100 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 osc.lustre-OST0001-osc-ffff9d2192234000.rpc_stats= snapshot_time: 1786832591.307900195 secs.nsecs start_time: 1786832393.268952629 secs.nsecs elapsed_time: 198.038947566 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 | 3 75 75 2: 0 0 0 | 0 0 75 4: 0 0 0 | 0 0 75 8: 0 0 0 | 1 25 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 1 25 25 2: 0 0 0 | 1 25 50 3: 0 0 0 | 1 25 75 4: 0 0 0 | 1 25 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 4 100 100 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 | 0 0 0 16384: 0 0 0 | 3 75 75 32768: 0 0 0 | 0 0 75 65536: 0 0 0 | 1 25 100 llite.lustre-ffff9d2192234000.read_ahead_stats= snapshot_time 1786832591.326099382 secs.nsecs start_time 1786832393.302569007 secs.nsecs elapsed_time 198.023530375 secs.nsecs hits 97840 samples [pages] misses 6532 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 97840 samples [pages] failed_to_fast_read 6532 samples [pages] readahead_pages 6532 samples [pages] 1 15 97840