== sanity test 101a: check read-ahead for random reads === 15:18:52 (1786821532) nreads: 10000 file size: 96MB 172.825675s, 3.79203MB/s osc.lustre-OST0000-osc-ffff9995c655e000.rpc_stats= snapshot_time: 1786821724.404110777 secs.nsecs start_time: 1786821533.571571977 secs.nsecs elapsed_time: 190.832538800 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-ffff9995c655e000.rpc_stats= snapshot_time: 1786821724.404198364 secs.nsecs start_time: 1786821533.571626322 secs.nsecs elapsed_time: 190.832572042 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: 2 0 0 | 0 0 0 8: 5 0 0 | 0 0 0 16: 6544 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: 6551 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 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: 5 0 0 | 0 0 4 32: 7 0 0 | 0 0 4 64: 22 0 0 | 0 0 4 128: 31 0 1 | 0 0 4 256: 70 1 2 | 0 0 4 512: 137 2 4 | 0 0 4 1024: 259 3 8 | 1 4 8 2048: 546 8 16 | 2 8 16 4096: 1086 16 33 | 4 16 32 8192: 2141 32 65 | 8 32 64 16384: 2244 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: 1 0 0 | 0 0 0 4096: 1110 16 16 | 0 0 0 8192: 3827 58 75 | 0 0 0 16384: 1540 23 98 | 0 0 0 32768: 219 3 102 | 7 28 28 65536: 10 0 102 | 17 68 96 131072: 0 0 102 | 1 4 100 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-ffff9995c655e000.read_ahead_stats= snapshot_time 1786821724.416396074 secs.nsecs start_time 1786821533.590728940 secs.nsecs elapsed_time 190.825667134 secs.nsecs hits 98138 samples [pages] misses 6551 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 98138 samples [pages] failed_to_fast_read 6551 samples [pages] readahead_pages 6551 samples [pages] 3 15 98138