== sanity test 101a: check read-ahead for random reads === 09:45:46 (1785937546) nreads: 10000 file size: 96MB 180.513144s, 2.46114MB/s osc.lustre-OST0000-osc-ffff987a377f4000.rpc_stats= snapshot_time: 1785937754.139034796 secs.nsecs start_time: 1785937548.909536611 secs.nsecs elapsed_time: 205.229498185 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: 2 0 0 | 0 0 0 4: 2 0 0 | 0 0 0 8: 0 0 0 | 0 0 0 16: 3445 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: 3449 100 100 | 99 99 99 2: 0 0 100 | 1 1 100 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: 3 0 0 | 0 0 1 32: 5 0 0 | 0 0 1 64: 11 0 0 | 0 0 1 128: 19 0 1 | 0 0 1 256: 35 1 2 | 1 1 2 512: 79 2 4 | 2 2 4 1024: 138 4 8 | 4 4 8 2048: 307 8 17 | 8 8 16 4096: 592 17 34 | 16 16 32 8192: 1149 33 67 | 32 32 64 16384: 1108 32 100 | 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: 0 0 0 | 0 0 0 4096: 83 2 2 | 0 0 0 8192: 811 23 25 | 0 0 0 16384: 1550 44 70 | 25 25 25 32768: 947 27 98 | 53 53 78 65536: 139 4 102 | 23 23 101 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 osc.lustre-OST0001-osc-ffff987a377f4000.rpc_stats= snapshot_time: 1785937754.139151326 secs.nsecs start_time: 1785937548.909568716 secs.nsecs elapsed_time: 205.229582610 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 50 50 2: 0 0 0 | 0 0 50 4: 0 0 0 | 0 0 50 8: 0 0 0 | 1 50 100 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 llite.lustre-ffff987a377f4000.read_ahead_stats= snapshot_time 1785937754.179576476 secs.nsecs start_time 1785937548.939980493 secs.nsecs elapsed_time 205.239595983 secs.nsecs hits 51667 samples [pages] misses 3449 samples [pages] readpage_not_consecutive 6775 samples [pages] zero_size_window 51667 samples [pages] failed_to_fast_read 3449 samples [pages] readahead_pages 3449 samples [pages] 1 15 51667