== sanity test 101a: check read-ahead for random reads === 22:02:30 (1789264950) nreads: 10000 file size: 96MB 180.186931s, 3.50145MB/s osc.lustre-OST0000-osc-ffff8a134809d800.rpc_stats= snapshot_time: 1789265154.057296076 secs.nsecs start_time: 1789264952.485017682 secs.nsecs elapsed_time: 201.572278394 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: 2 0 0 | 1 3 3 2: 2 0 0 | 0 0 3 4: 4 0 0 | 0 0 3 8: 4 0 0 | 1 3 7 16: 6277 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: 6288 99 99 | 24 88 88 2: 1 0 100 | 2 7 96 3: 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: 6 0 0 | 0 0 11 32: 8 0 0 | 0 0 11 64: 20 0 0 | 0 0 11 128: 29 0 1 | 0 0 11 256: 67 1 2 | 0 0 11 512: 126 2 4 | 0 0 11 1024: 253 4 8 | 1 3 14 2048: 527 8 16 | 2 7 22 4096: 1039 16 33 | 4 14 37 8192: 2067 32 65 | 8 29 66 16384: 2142 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: 1 0 0 | 0 0 0 4096: 942 14 14 | 0 0 0 8192: 3345 53 68 | 0 0 0 16384: 1842 29 97 | 1 3 3 32768: 291 4 102 | 4 14 18 65536: 17 0 102 | 11 40 59 131072: 0 0 102 | 8 29 88 262144: 0 0 102 | 1 3 92 524288: 0 0 102 | 2 7 100 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 osc.lustre-OST0001-osc-ffff8a134809d800.rpc_stats= snapshot_time: 1789265154.057430365 secs.nsecs start_time: 1789264952.485050932 secs.nsecs elapsed_time: 201.572379433 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 | 0 0 0 32768: 0 0 0 | 3 100 100 llite.lustre-ffff8a134809d800.read_ahead_stats= snapshot_time 1789265154.071375730 secs.nsecs start_time 1789264952.505556133 secs.nsecs elapsed_time 201.565819597 secs.nsecs hits 94164 samples [pages] misses 6288 samples [pages] readpage_not_consecutive 9619 samples [pages] failed_grab_cache_page 9 samples [pages] zero_size_window 94162 samples [pages] failed_to_reach_end 3 samples [pages] failed_to_fast_read 6287 samples [pages] readahead_pages 6287 samples [pages] 1 15 94164