== sanity test 101a: check read-ahead for random reads === 15:36:48 (1783971408) nreads: 10000 file size: 96MB 166.283148s, 3.94123MB/s osc.lustre-OST0000-osc-ffff9acec525f800.rpc_stats= snapshot_time: 1783971594.926388026 secs.nsecs start_time: 1783971410.084878778 secs.nsecs elapsed_time: 184.841509248 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-ffff9acec525f800.rpc_stats= snapshot_time: 1783971594.926459361 secs.nsecs start_time: 1783971410.084910240 secs.nsecs elapsed_time: 184.841549121 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: 2 0 0 | 0 0 0 8: 7 0 0 | 0 0 0 16: 5033 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: 5042 100 100 | 97 97 97 2: 0 0 100 | 2 2 99 3: 0 0 100 | 1 1 100 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: 53 1 2 | 1 1 2 512: 106 2 4 | 2 2 4 1024: 208 4 8 | 4 4 8 2048: 428 8 16 | 8 8 16 4096: 851 16 33 | 16 16 32 8192: 1671 33 66 | 32 32 64 16384: 1670 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: 226 4 4 | 0 0 0 8192: 2678 53 57 | 2 2 2 16384: 1795 35 93 | 26 26 28 32768: 437 8 101 | 58 58 86 65536: 23 0 102 | 12 12 98 131072: 2 0 102 | 2 2 100 262144: 0 0 102 | 1 1 101 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 llite.lustre-ffff9acec525f800.read_ahead_stats= snapshot_time 1783971594.968332611 secs.nsecs start_time 1783971410.106108734 secs.nsecs elapsed_time 184.862223877 secs.nsecs hits 75514 samples [pages] misses 5042 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75514 samples [pages] failed_to_fast_read 5042 samples [pages] readahead_pages 5042 samples [pages] 2 15 75514