== sanity test 101a: check read-ahead for random reads === 14:08:10 (1788804490) nreads: 10000 file size: 96MB 180.328067s, 2.8569MB/s osc.lustre-OST0000-osc-ffff8d1d854dd800.rpc_stats= snapshot_time: 1788804694.175056952 secs.nsecs start_time: 1788804493.084613425 secs.nsecs elapsed_time: 201.090443527 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 | 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 | 0 0 0 8192: 0 0 0 | 0 0 0 16384: 0 0 0 | 0 0 0 32768: 0 0 0 | 2 100 100 osc.lustre-OST0001-osc-ffff8d1d854dd800.rpc_stats= snapshot_time: 1788804694.175221664 secs.nsecs start_time: 1788804493.084646255 secs.nsecs elapsed_time: 201.090575409 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: 2 0 0 | 2 7 7 2: 1 0 0 | 0 0 7 4: 4 0 0 | 0 0 7 8: 3 0 0 | 1 3 10 16: 5164 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: 5174 100 100 | 27 96 96 2: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 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: 4 0 0 | 0 0 14 32: 7 0 0 | 0 0 14 64: 13 0 0 | 0 0 14 128: 22 0 1 | 0 0 14 256: 53 1 2 | 0 0 14 512: 111 2 4 | 0 0 14 1024: 197 3 7 | 1 3 17 2048: 450 8 16 | 2 7 25 4096: 853 16 33 | 4 14 39 8192: 1684 32 65 | 8 28 67 16384: 1774 34 100 | 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: 0 0 0 | 0 0 0 2048: 1 0 0 | 0 0 0 4096: 281 5 5 | 0 0 0 8192: 2292 44 49 | 0 0 0 16384: 2048 39 89 | 1 3 3 32768: 613 11 101 | 3 10 14 65536: 61 1 102 | 19 67 82 131072: 0 0 102 | 5 17 100 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 llite.lustre-ffff8d1d854dd800.read_ahead_stats= snapshot_time 1788804694.202460023 secs.nsecs start_time 1788804493.102068287 secs.nsecs elapsed_time 201.100391736 secs.nsecs hits 77474 samples [pages] misses 5174 samples [pages] readpage_not_consecutive 7857 samples [pages] zero_size_window 77476 samples [pages] failed_to_fast_read 5174 samples [pages] readahead_pages 5172 samples [pages] 1 15 77474