== sanity test 101a: check read-ahead for random reads === 09:42:02 (1773236522) nreads: 10000 file size: 96MB 62.237155s, 10.53MB/s osc.lustre-OST0000-osc-ffff9cea04fae800.rpc_stats= snapshot_time: 1773236596.632322857 secs.nsecs start_time: 1773236522.808805482 secs.nsecs elapsed_time: 73.823517375 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 | 1 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 1 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 1 100 100 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 | 1 100 100 osc.lustre-OST0001-osc-ffff9cea04fae800.rpc_stats= snapshot_time: 1773236596.632398234 secs.nsecs start_time: 1773236522.808851347 secs.nsecs elapsed_time: 73.823546887 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: 3 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 4 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 6430 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: 6441 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 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: 20 0 0 | 0 0 4 128: 31 0 1 | 0 0 4 256: 69 1 2 | 0 0 4 512: 135 2 4 | 0 0 4 1024: 267 4 8 | 1 4 8 2048: 555 8 17 | 2 8 16 4096: 1110 17 34 | 4 16 32 8192: 2178 33 68 | 8 32 64 16384: 2058 31 100 | 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: 3 0 0 | 0 0 0 2048: 5027 78 78 | 0 0 0 4096: 1446 22 100 | 0 0 0 8192: 116 1 102 | 0 0 0 16384: 1 0 102 | 20 80 80 32768: 0 0 102 | 5 20 100 65536: 0 0 102 | 0 0 100 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-ffff9cea04fae800.read_ahead_stats= snapshot_time 1773236596.639049690 secs.nsecs start_time 1773236522.816203747 secs.nsecs elapsed_time 73.822845943 secs.nsecs hits 96443 samples [pages] misses 6441 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 96446 samples [pages] failed_to_fast_read 6441 samples [pages] readahead_pages 6438 samples [pages] 2 15 96443