== sanity test 101a: check read-ahead for random reads === 18:46:09 (1788561969) nreads: 10000 file size: 96MB 180.304758s, 2.5345MB/s osc.lustre-OST0000-osc-ffff953018d9b000.rpc_stats= snapshot_time: 1788562179.158065700 secs.nsecs start_time: 1788561970.933065543 secs.nsecs elapsed_time: 208.225000157 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-ffff953018d9b000.rpc_stats= snapshot_time: 1788562179.158277248 secs.nsecs start_time: 1788561970.933089772 secs.nsecs elapsed_time: 208.225187476 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: 1 0 0 | 0 0 0 2: 2 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 4569 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: 4576 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: 6 0 0 | 0 0 4 64: 12 0 0 | 0 0 4 128: 21 0 1 | 0 0 4 256: 44 0 2 | 0 0 4 512: 96 2 4 | 0 0 4 1024: 173 3 7 | 1 4 8 2048: 399 8 16 | 2 8 16 4096: 759 16 33 | 4 16 32 8192: 1488 32 65 | 8 32 64 16384: 1569 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: 128 2 2 | 0 0 0 8192: 1717 37 40 | 0 0 0 16384: 2011 43 84 | 0 0 0 32768: 765 16 100 | 0 0 0 65536: 62 1 102 | 11 44 44 131072: 1 0 102 | 14 56 100 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-ffff953018d9b000.read_ahead_stats= snapshot_time 1788562179.172965312 secs.nsecs start_time 1788561970.939315685 secs.nsecs elapsed_time 208.233649627 secs.nsecs hits 68512 samples [pages] misses 4576 samples [pages] readpage_not_consecutive 6969 samples [pages] zero_size_window 68513 samples [pages] failed_to_fast_read 4576 samples [pages] readahead_pages 4575 samples [pages] 1 15 68512