== sanity test 101a: check read-ahead for random reads === 13:17:24 (1772907444) nreads: 10000 file size: 96MB 61.299830s, 10.6911MB/s osc.lustre-OST0000-osc-ffff9b5282e54000.rpc_stats= snapshot_time: 1772907516.779573997 secs.nsecs start_time: 1772907445.315962298 secs.nsecs elapsed_time: 71.463611699 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 66 66 2: 0 0 0 | 0 0 66 4: 0 0 0 | 0 0 66 8: 0 0 0 | 1 33 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 66 66 2: 0 0 0 | 1 33 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 3 100 100 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 | 1 33 33 4096: 0 0 0 | 0 0 33 8192: 0 0 0 | 1 33 66 16384: 0 0 0 | 1 33 100 osc.lustre-OST0001-osc-ffff9b5282e54000.rpc_stats= snapshot_time: 1772907516.779657471 secs.nsecs start_time: 1772907445.315998863 secs.nsecs elapsed_time: 71.463658608 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 1 1 2: 0 0 0 | 0 0 1 4: 4 0 0 | 0 0 1 8: 0 0 0 | 0 0 1 16: 4993 99 100 | 0 0 1 32: 0 0 100 | 0 0 1 64: 0 0 100 | 0 0 1 128: 0 0 100 | 0 0 1 256: 0 0 100 | 100 98 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4997 100 100 | 101 99 99 2: 0 0 100 | 1 0 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 3 2 2 1: 0 0 0 | 0 0 2 2: 0 0 0 | 0 0 2 4: 0 0 0 | 0 0 2 8: 0 0 0 | 0 0 2 16: 5 0 0 | 0 0 2 32: 7 0 0 | 0 0 2 64: 16 0 0 | 0 0 2 128: 26 0 1 | 0 0 2 256: 52 1 2 | 1 0 3 512: 106 2 4 | 2 1 5 1024: 203 4 8 | 4 3 9 2048: 426 8 16 | 8 7 17 4096: 853 17 33 | 16 15 33 8192: 1666 33 67 | 32 31 64 16384: 1634 32 100 | 36 35 100 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: 2049 41 41 | 0 0 0 4096: 2933 58 99 | 28 27 27 8192: 133 2 102 | 70 68 96 16384: 1 0 102 | 5 4 100 32768: 0 0 102 | 0 0 100 65536: 0 0 102 | 0 0 100 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 llite.lustre-ffff9b5282e54000.read_ahead_stats= snapshot_time 1772907516.786668250 secs.nsecs start_time 1772907445.323748908 secs.nsecs elapsed_time 71.462919342 secs.nsecs hits 74881 samples [pages] misses 4997 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 74881 samples [pages] failed_to_fast_read 4997 samples [pages] readahead_pages 4997 samples [pages] 3 15 74881