== sanity test 101a: check read-ahead for random reads === 20:03:54 (1772759034) nreads: 10000 file size: 96MB 62.612729s, 10.4669MB/s osc.lustre-OST0000-osc-ffff8e471167c000.rpc_stats= snapshot_time: 1772759112.964320678 secs.nsecs start_time: 1772759035.114329562 secs.nsecs elapsed_time: 77.849991116 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 10 10 2: 0 0 0 | 0 0 10 4: 2 0 0 | 0 0 10 8: 9 0 0 | 0 0 10 16: 6401 99 100 | 0 0 10 32: 0 0 100 | 0 0 10 64: 0 0 100 | 0 0 10 128: 0 0 100 | 0 0 10 256: 0 0 100 | 0 0 10 512: 0 0 100 | 0 0 10 1024: 0 0 100 | 25 89 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 6412 100 100 | 27 96 96 2: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 4 14 14 1: 0 0 0 | 0 0 14 2: 0 0 0 | 0 0 14 4: 0 0 0 | 0 0 14 8: 0 0 0 | 0 0 14 16: 5 0 0 | 0 0 14 32: 8 0 0 | 0 0 14 64: 20 0 0 | 0 0 14 128: 29 0 1 | 0 0 14 256: 70 1 2 | 0 0 14 512: 132 2 4 | 0 0 14 1024: 268 4 8 | 1 3 17 2048: 547 8 16 | 2 7 25 4096: 1090 16 33 | 4 14 39 8192: 2135 33 67 | 8 28 67 16384: 2103 32 100 | 9 32 100 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: 4 0 0 | 0 0 0 2048: 5760 89 89 | 2 7 7 4096: 790 12 102 | 1 3 10 8192: 11 0 102 | 0 0 10 16384: 0 0 102 | 17 60 71 32768: 0 0 102 | 7 25 96 65536: 0 0 102 | 1 3 100 131072: 0 0 102 | 0 0 100 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-ffff8e471167c000.rpc_stats= snapshot_time: 1772759112.964410908 secs.nsecs start_time: 1772759035.114377362 secs.nsecs elapsed_time: 77.850033546 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 | 1 50 50 2: 0 0 0 | 1 50 100 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 | 2 100 100 llite.lustre-ffff8e471167c000.read_ahead_stats= snapshot_time 1772759112.970738018 secs.nsecs start_time 1772759035.120455831 secs.nsecs elapsed_time 77.850282187 secs.nsecs hits 96032 samples [pages] misses 6412 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 96032 samples [pages] failed_to_fast_read 6412 samples [pages] readahead_pages 6412 samples [pages] 2 15 96032