== sanity test 101a: check read-ahead for random reads === 08:05:28 (1785758728) nreads: 10000 file size: 96MB 180.513729s, 2.28288MB/s osc.lustre-OST0000-osc-ffff8bf77d451800.rpc_stats= snapshot_time: 1785758940.135250703 secs.nsecs start_time: 1785758732.008926664 secs.nsecs elapsed_time: 208.126324039 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 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 0 0 0 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 0 0 0 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 osc.lustre-OST0001-osc-ffff8bf77d451800.rpc_stats= snapshot_time: 1785758940.135316873 secs.nsecs start_time: 1785758732.008957414 secs.nsecs elapsed_time: 208.126359459 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: 0 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 6 0 0 | 0 0 0 16: 4111 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 | 0 0 0 512: 0 0 100 | 0 0 0 1024: 0 0 100 | 25 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4117 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 4 0 0 | 1 4 4 1: 0 0 0 | 0 0 4 2: 0 0 0 | 0 0 4 4: 0 0 0 | 0 0 4 8: 0 0 0 | 0 0 4 16: 3 0 0 | 0 0 4 32: 6 0 0 | 0 0 4 64: 11 0 0 | 0 0 4 128: 20 0 1 | 0 0 4 256: 41 0 2 | 0 0 4 512: 89 2 4 | 0 0 4 1024: 155 3 7 | 1 4 8 2048: 355 8 16 | 2 8 16 4096: 675 16 33 | 4 16 32 8192: 1350 32 65 | 8 32 64 16384: 1408 34 100 | 9 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: 368 8 8 | 0 0 0 8192: 1071 26 34 | 0 0 0 16384: 1769 42 77 | 0 0 0 32768: 867 21 98 | 0 0 0 65536: 137 3 102 | 17 68 68 131072: 2 0 102 | 6 24 92 262144: 0 0 102 | 1 4 96 524288: 0 0 102 | 0 0 96 1048576: 0 0 102 | 1 4 100 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 llite.lustre-ffff8bf77d451800.read_ahead_stats= snapshot_time 1785758940.152987101 secs.nsecs start_time 1785758732.054188907 secs.nsecs elapsed_time 208.098798194 secs.nsecs hits 61640 samples [pages] misses 4117 samples [pages] readpage_not_consecutive 6285 samples [pages] zero_size_window 61640 samples [pages] failed_to_fast_read 4117 samples [pages] readahead_pages 4117 samples [pages] 5 15 61640