== sanity test 101a: check read-ahead for random reads === 18:48:43 (1787870923) nreads: 10000 file size: 96MB 163.813005s, 4.00066MB/s osc.lustre-OST0000-osc-ffff96757501c000.rpc_stats= snapshot_time: 1787871105.756745661 secs.nsecs start_time: 1787870925.565255273 secs.nsecs elapsed_time: 180.191490388 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: 4 0 0 | 0 0 0 4: 3 0 0 | 0 0 0 8: 3 0 0 | 0 0 0 16: 5036 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: 5046 100 100 | 100 100 100 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: 4 0 0 | 0 0 1 32: 6 0 0 | 0 0 1 64: 16 0 0 | 0 0 1 128: 26 0 1 | 0 0 1 256: 52 1 2 | 1 1 2 512: 107 2 4 | 2 2 4 1024: 208 4 8 | 4 4 8 2048: 428 8 16 | 8 8 16 4096: 857 16 33 | 16 16 32 8192: 1671 33 66 | 32 32 64 16384: 1668 33 100 | 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: 137 2 2 | 0 0 0 8192: 2587 51 53 | 0 0 0 16384: 2006 39 93 | 37 37 37 32768: 399 7 101 | 55 55 92 65536: 36 0 102 | 9 9 101 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-ffff96757501c000.rpc_stats= snapshot_time: 1787871105.756867350 secs.nsecs start_time: 1787870925.565291653 secs.nsecs elapsed_time: 180.191575697 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 llite.lustre-ffff96757501c000.read_ahead_stats= snapshot_time 1787871105.777916236 secs.nsecs start_time 1787870925.581343797 secs.nsecs elapsed_time 180.196572439 secs.nsecs hits 75535 samples [pages] misses 5046 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75535 samples [pages] failed_to_fast_read 5046 samples [pages] readahead_pages 5046 samples [pages] 1 15 75535