== sanity test 101a: check read-ahead for random reads === 00:27:21 (1786076841) nreads: 10000 file size: 96MB 180.987802s, 2.6676MB/s osc.lustre-OST0000-osc-ffff8a6defa9c800.rpc_stats= snapshot_time: 1786077044.147172071 secs.nsecs start_time: 1786076842.791288921 secs.nsecs elapsed_time: 201.355883150 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-ffff8a6defa9c800.rpc_stats= snapshot_time: 1786077044.147467028 secs.nsecs start_time: 1786076842.791350266 secs.nsecs elapsed_time: 201.356116762 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: 1 0 0 | 0 0 0 8: 5 0 0 | 0 0 0 16: 4817 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: 4823 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: 49 1 2 | 0 0 4 512: 103 2 4 | 0 0 4 1024: 181 3 7 | 1 4 8 2048: 420 8 16 | 2 8 16 4096: 794 16 33 | 4 16 32 8192: 1568 32 65 | 8 32 64 16384: 1659 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: 65 1 1 | 0 0 0 8192: 2064 42 44 | 0 0 0 16384: 2100 43 87 | 0 0 0 32768: 652 13 101 | 1 4 4 65536: 56 1 102 | 22 88 92 131072: 0 0 102 | 2 8 100 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-ffff8a6defa9c800.read_ahead_stats= snapshot_time 1786077044.190924903 secs.nsecs start_time 1786076842.812423919 secs.nsecs elapsed_time 201.378500984 secs.nsecs hits 72245 samples [pages] misses 4823 samples [pages] readpage_not_consecutive 7363 samples [pages] zero_size_window 72245 samples [pages] failed_to_fast_read 4823 samples [pages] readahead_pages 4823 samples [pages] 2 15 72245