== sanity test 101a: check read-ahead for random reads === 05:42:27 (1788601347) nreads: 10000 file size: 96MB 164.897356s, 3.97435MB/s osc.lustre-OST0000-osc-ffffa0506079e800.rpc_stats= snapshot_time: 1788601528.991816866 secs.nsecs start_time: 1788601348.784746770 secs.nsecs elapsed_time: 180.207070096 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-ffffa0506079e800.rpc_stats= snapshot_time: 1788601528.991898249 secs.nsecs start_time: 1788601348.785118708 secs.nsecs elapsed_time: 180.206779541 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: 0 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 6591 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 | 1 3 3 512: 0 0 100 | 0 0 3 1024: 0 0 100 | 25 96 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 6594 99 99 | 24 92 92 2: 1 0 100 | 2 7 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 0 0 | 1 3 3 1: 0 0 0 | 0 0 3 2: 0 0 0 | 0 0 3 4: 0 0 0 | 0 0 3 8: 0 0 0 | 0 0 3 16: 5 0 0 | 0 0 3 32: 8 0 0 | 0 0 3 64: 20 0 0 | 0 0 3 128: 31 0 1 | 0 0 3 256: 72 1 2 | 0 0 3 512: 136 2 4 | 0 0 3 1024: 214 3 7 | 2 7 11 2048: 568 8 16 | 2 7 19 4096: 1082 16 32 | 4 15 34 8192: 2188 33 65 | 8 30 65 16384: 2265 34 100 | 9 34 100 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: 1080 16 16 | 0 0 0 8192: 4068 61 78 | 0 0 0 16384: 1457 22 100 | 1 3 3 32768: 143 2 102 | 10 38 42 65536: 4 0 102 | 15 57 100 131072: 0 0 102 | 0 0 100 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-ffffa0506079e800.read_ahead_stats= snapshot_time 1788601528.998751367 secs.nsecs start_time 1788601348.805074069 secs.nsecs elapsed_time 180.193677298 secs.nsecs hits 98864 samples [pages] misses 6595 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 98864 samples [pages] failed_to_fast_read 6595 samples [pages] readahead_pages 6595 samples [pages] 4 15 98864