== sanity test 101a: check read-ahead for random reads === 15:43:36 (1783971816) nreads: 10000 file size: 96MB 180.775807s, 2.64463MB/s osc.lustre-OST0000-osc-ffff93db203c2800.rpc_stats= snapshot_time: 1783972020.153863210 secs.nsecs start_time: 1783971818.670444239 secs.nsecs elapsed_time: 201.483418971 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 | 1 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 1 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 1 100 100 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 | 1 100 100 osc.lustre-OST0001-osc-ffff93db203c2800.rpc_stats= snapshot_time: 1783972020.153958485 secs.nsecs start_time: 1783971818.670486040 secs.nsecs elapsed_time: 201.483472445 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: 7 0 0 | 0 0 0 8: 7 0 0 | 0 0 0 16: 4765 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 | 0 0 0 512: 0 0 100 | 0 0 0 1024: 0 0 100 | 25 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4779 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 1 4 4 1: 0 0 0 | 0 0 4 2: 0 0 0 | 0 0 4 4: 0 0 0 | 0 0 4 8: 0 0 0 | 0 0 4 16: 4 0 0 | 0 0 4 32: 7 0 0 | 0 0 4 64: 12 0 0 | 0 0 4 128: 21 0 1 | 0 0 4 256: 48 1 2 | 0 0 4 512: 99 2 4 | 0 0 4 1024: 180 3 7 | 1 4 8 2048: 415 8 16 | 2 8 16 4096: 788 16 33 | 4 16 32 8192: 1557 32 65 | 8 32 64 16384: 1643 34 100 | 9 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: 102 2 2 | 0 0 0 8192: 1906 39 42 | 0 0 0 16384: 2144 44 86 | 0 0 0 32768: 696 14 101 | 1 4 4 65536: 44 0 102 | 19 76 80 131072: 0 0 102 | 4 16 96 262144: 0 0 102 | 1 4 100 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-ffff93db203c2800.read_ahead_stats= snapshot_time 1783972020.188962152 secs.nsecs start_time 1783971818.715898146 secs.nsecs elapsed_time 201.473064006 secs.nsecs hits 71471 samples [pages] misses 4779 samples [pages] readpage_not_consecutive 7291 samples [pages] zero_size_window 71471 samples [pages] failed_to_fast_read 4779 samples [pages] readahead_pages 4779 samples [pages] 2 15 71471