== sanity test 101a: check read-ahead for random reads === 12:56:26 (1772474186) nreads: 10000 file size: 96MB 101.814242s, 6.43682MB/s osc.lustre-OST0000-osc-ffff898ac5351000.rpc_stats= snapshot_time: 1772474299.705358271 secs.nsecs start_time: 1772474187.289187064 secs.nsecs elapsed_time: 112.416171207 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-ffff898ac5351000.rpc_stats= snapshot_time: 1772474299.705425426 secs.nsecs start_time: 1772474187.289231521 secs.nsecs elapsed_time: 112.416193905 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 | 0 0 0 2: 0 0 0 | 0 0 0 4: 3 0 0 | 0 0 0 8: 5 0 0 | 0 0 0 16: 5043 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 | 100 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5053 100 100 | 100 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 1 1 1 1: 0 0 0 | 0 0 1 2: 0 0 0 | 0 0 1 4: 0 0 0 | 0 0 1 8: 0 0 0 | 0 0 1 16: 4 0 0 | 0 0 1 32: 6 0 0 | 0 0 1 64: 16 0 0 | 0 0 1 128: 26 0 1 | 0 0 1 256: 53 1 2 | 1 1 2 512: 108 2 4 | 2 2 4 1024: 207 4 8 | 4 4 8 2048: 428 8 16 | 8 8 16 4096: 852 16 33 | 16 16 32 8192: 1682 33 66 | 32 32 64 16384: 1668 33 100 | 36 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: 1369 27 27 | 0 0 0 8192: 3308 65 92 | 17 17 17 16384: 480 9 102 | 73 73 90 32768: 15 0 102 | 11 11 101 65536: 0 0 102 | 0 0 101 131072: 0 0 102 | 0 0 101 262144: 0 0 102 | 0 0 101 524288: 0 0 102 | 0 0 101 1048576: 0 0 102 | 0 0 101 2097152: 0 0 102 | 0 0 101 4194304: 0 0 102 | 0 0 101 8388608: 0 0 102 | 0 0 101 16777216: 0 0 102 | 0 0 101 33554432: 0 0 102 | 0 0 101 67108864: 0 0 102 | 0 0 101 134217728: 0 0 102 | 0 0 101 268435456: 0 0 102 | 0 0 101 536870912: 0 0 102 | 0 0 101 1073741824: 0 0 102 | 0 0 101 llite.lustre-ffff898ac5351000.read_ahead_stats= snapshot_time 1772474299.716086548 secs.nsecs start_time 1772474187.303638755 secs.nsecs elapsed_time 112.412447793 secs.nsecs hits 75639 samples [pages] misses 5053 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75641 samples [pages] failed_to_fast_read 5053 samples [pages] readahead_pages 5051 samples [pages] 2 15 75639