== sanity test 101a: check read-ahead for random reads === 08:22:04 (1788524524) nreads: 10000 file size: 96MB 180.998620s, 3.5397MB/s osc.lustre-OST0000-osc-ffffa09219018800.rpc_stats= snapshot_time: 1788524727.076233417 secs.nsecs start_time: 1788524526.512412732 secs.nsecs elapsed_time: 200.563820685 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: 1 0 0 | 0 0 0 4: 2 0 0 | 0 0 0 8: 2 0 0 | 0 0 0 16: 4925 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: 4930 100 100 | 98 98 98 2: 0 0 100 | 2 2 100 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: 51 1 2 | 1 1 2 512: 104 2 4 | 2 2 4 1024: 205 4 8 | 4 4 8 2048: 418 8 16 | 8 8 16 4096: 832 16 33 | 16 16 32 8192: 1634 33 66 | 32 32 64 16384: 1631 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: 164 3 3 | 0 0 0 8192: 2095 42 45 | 0 0 0 16384: 2099 42 88 | 25 25 25 32768: 636 12 101 | 59 59 84 65536: 52 1 102 | 15 15 99 131072: 0 0 102 | 2 2 101 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-ffffa09219018800.rpc_stats= snapshot_time: 1788524727.077965850 secs.nsecs start_time: 1788524526.512449019 secs.nsecs elapsed_time: 200.565516831 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-ffffa09219018800.read_ahead_stats= snapshot_time 1788524727.110188552 secs.nsecs start_time 1788524526.528076371 secs.nsecs elapsed_time 200.582112181 secs.nsecs hits 73864 samples [pages] misses 4930 samples [pages] readpage_not_consecutive 9768 samples [pages] zero_size_window 73864 samples [pages] failed_to_fast_read 4930 samples [pages] readahead_pages 4930 samples [pages] 1 15 73864