== sanity test 101a: check read-ahead for random reads === 01:12:38 (1784697158) nreads: 10000 file size: 96MB 152.123105s, 4.30809MB/s osc.lustre-OST0000-osc-ffff8b8d50fcc800.rpc_stats= snapshot_time: 1784697325.356999006 secs.nsecs start_time: 1784697159.631701013 secs.nsecs elapsed_time: 165.725297993 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-ffff8b8d50fcc800.rpc_stats= snapshot_time: 1784697325.357085364 secs.nsecs start_time: 1784697159.631732876 secs.nsecs elapsed_time: 165.725352488 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: 1 0 0 | 0 0 0 4: 3 0 0 | 0 0 0 8: 1 0 0 | 0 0 0 16: 6579 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: 6584 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 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: 8 0 0 | 0 0 4 64: 19 0 0 | 0 0 4 128: 31 0 1 | 0 0 4 256: 72 1 2 | 0 0 4 512: 134 2 4 | 0 0 4 1024: 252 3 8 | 1 4 8 2048: 560 8 16 | 2 8 16 4096: 1072 16 32 | 4 16 32 8192: 2166 32 65 | 8 32 64 16384: 2259 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: 0 0 0 | 0 0 0 4096: 1662 25 25 | 0 0 0 8192: 4232 64 89 | 0 0 0 16384: 738 11 100 | 1 4 4 32768: 86 1 102 | 13 52 56 65536: 15 0 102 | 9 36 92 131072: 4 0 102 | 1 4 96 262144: 3 0 102 | 0 0 96 524288: 0 0 102 | 1 4 100 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-ffff8b8d50fcc800.read_ahead_stats= snapshot_time 1784697325.369333051 secs.nsecs start_time 1784697159.638965087 secs.nsecs elapsed_time 165.730367964 secs.nsecs hits 98679 samples [pages] misses 6584 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 98679 samples [pages] failed_to_fast_read 6584 samples [pages] readahead_pages 6584 samples [pages] 1 15 98679