== sanity test 101a: check read-ahead for random reads === 17:24:11 (1789075451) nreads: 10000 file size: 96MB 180.998242s, 2.43065MB/s osc.lustre-OST0000-osc-ffff980260393800.rpc_stats= snapshot_time: 1789075652.267021661 secs.nsecs start_time: 1789075453.742416805 secs.nsecs elapsed_time: 198.524604856 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 | 3 100 100 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 | 0 0 0 4096: 0 0 0 | 0 0 0 8192: 0 0 0 | 0 0 0 16384: 0 0 0 | 1 33 33 32768: 0 0 0 | 1 33 66 65536: 0 0 0 | 1 33 100 osc.lustre-OST0001-osc-ffff980260393800.rpc_stats= snapshot_time: 1789075652.267116110 secs.nsecs start_time: 1789075453.742495875 secs.nsecs elapsed_time: 198.524620235 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 3 3 2: 0 0 0 | 0 0 3 4: 0 0 0 | 0 0 3 8: 5 0 0 | 1 3 7 16: 4385 99 100 | 0 0 7 32: 0 0 100 | 0 0 7 64: 0 0 100 | 0 0 7 128: 0 0 100 | 0 0 7 256: 0 0 100 | 0 0 7 512: 0 0 100 | 0 0 7 1024: 0 0 100 | 25 92 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4390 100 100 | 26 96 96 2: 0 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 3 11 11 1: 0 0 0 | 0 0 11 2: 0 0 0 | 0 0 11 4: 0 0 0 | 0 0 11 8: 0 0 0 | 0 0 11 16: 4 0 0 | 0 0 11 32: 6 0 0 | 0 0 11 64: 12 0 0 | 0 0 11 128: 21 0 1 | 0 0 11 256: 43 0 2 | 0 0 11 512: 93 2 4 | 0 0 11 1024: 167 3 7 | 1 3 14 2048: 380 8 16 | 2 7 22 4096: 726 16 33 | 4 14 37 8192: 1435 32 65 | 8 29 66 16384: 1498 34 100 | 9 33 100 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: 36 0 0 | 0 0 0 8192: 1545 35 36 | 0 0 0 16384: 2055 46 82 | 1 3 3 32768: 793 18 100 | 2 7 11 65536: 64 1 102 | 14 51 62 131072: 0 0 102 | 10 37 100 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-ffff980260393800.read_ahead_stats= snapshot_time 1789075652.315504802 secs.nsecs start_time 1789075453.764100935 secs.nsecs elapsed_time 198.551403867 secs.nsecs hits 65765 samples [pages] misses 4390 samples [pages] readpage_not_consecutive 6710 samples [pages] zero_size_window 65765 samples [pages] failed_to_fast_read 4390 samples [pages] readahead_pages 4390 samples [pages] 4 15 65765