== sanity test 101a: check read-ahead for random reads === 04:19:35 (1780993175) nreads: 10000 file size: 96MB 180.079140s, 3.39618MB/s osc.lustre-OST0000-osc-ffff891c88d69800.rpc_stats= snapshot_time: 1780993387.105207708 secs.nsecs start_time: 1780993177.601935028 secs.nsecs elapsed_time: 209.503272680 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 | 2 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 2 100 100 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 | 1 50 50 32768: 0 0 0 | 1 50 100 osc.lustre-OST0001-osc-ffff891c88d69800.rpc_stats= snapshot_time: 1780993387.105299811 secs.nsecs start_time: 1780993177.601970573 secs.nsecs elapsed_time: 209.503329238 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: 3 0 0 | 2 1 1 2: 0 0 0 | 0 0 1 4: 1 0 0 | 0 0 1 8: 8 0 0 | 1 0 2 16: 4702 99 100 | 0 0 2 32: 0 0 100 | 0 0 2 64: 0 0 100 | 0 0 2 128: 0 0 100 | 0 0 2 256: 0 0 100 | 100 97 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4714 100 100 | 98 95 95 2: 0 0 100 | 5 4 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 4 3 3 1: 0 0 0 | 0 0 3 2: 0 0 0 | 0 0 3 4: 0 0 0 | 0 0 3 8: 0 0 0 | 0 0 3 16: 4 0 0 | 0 0 3 32: 6 0 0 | 0 0 3 64: 15 0 0 | 0 0 3 128: 25 0 1 | 0 0 3 256: 49 1 2 | 1 0 4 512: 100 2 4 | 2 1 6 1024: 193 4 8 | 4 3 10 2048: 404 8 16 | 8 7 18 4096: 797 16 33 | 16 15 33 8192: 1561 33 66 | 32 31 65 16384: 1557 33 100 | 36 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: 0 0 0 | 0 0 0 4096: 150 3 3 | 0 0 0 8192: 1778 37 40 | 2 1 1 16384: 2137 45 86 | 11 10 12 32768: 715 15 101 | 45 43 56 65536: 45 0 102 | 43 41 98 131072: 0 0 102 | 3 2 100 262144: 0 0 102 | 1 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-ffff891c88d69800.read_ahead_stats= snapshot_time 1780993387.155534500 secs.nsecs start_time 1780993177.610448395 secs.nsecs elapsed_time 209.545086105 secs.nsecs hits 70532 samples [pages] misses 4714 samples [pages] readpage_not_consecutive 9325 samples [pages] zero_size_window 70535 samples [pages] failed_to_fast_read 4714 samples [pages] readahead_pages 4711 samples [pages] 2 15 70532