== sanity test 101a: check read-ahead for random reads === 21:52:38 (1788832358) nreads: 10000 file size: 96MB 180.366050s, 3.43983MB/s osc.lustre-OST0000-osc-ffff8e20c4b8c800.rpc_stats= snapshot_time: 1788832558.128590710 secs.nsecs start_time: 1788832359.549920834 secs.nsecs elapsed_time: 198.578669876 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: 2 0 0 | 0 0 0 4: 1 0 0 | 0 0 0 8: 7 0 0 | 0 0 0 16: 6171 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: 6181 99 99 | 25 100 100 2: 2 0 100 | 0 0 100 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: 6 0 0 | 0 0 4 32: 8 0 0 | 0 0 4 64: 19 0 0 | 0 0 4 128: 30 0 1 | 0 0 4 256: 64 1 2 | 0 0 4 512: 127 2 4 | 0 0 4 1024: 237 3 8 | 1 4 8 2048: 531 8 16 | 2 8 16 4096: 1013 16 32 | 4 16 32 8192: 2034 32 65 | 8 32 64 16384: 2109 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: 14 0 0 | 0 0 0 4096: 849 13 13 | 0 0 0 8192: 3247 52 66 | 0 0 0 16384: 1846 29 96 | 0 0 0 32768: 350 5 101 | 2 8 8 65536: 23 0 102 | 22 88 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 osc.lustre-OST0001-osc-ffff8e20c4b8c800.rpc_stats= snapshot_time: 1788832558.128762640 secs.nsecs start_time: 1788832359.549953027 secs.nsecs elapsed_time: 198.578809613 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 llite.lustre-ffff8e20c4b8c800.read_ahead_stats= snapshot_time 1788832558.148811269 secs.nsecs start_time 1788832359.561685079 secs.nsecs elapsed_time 198.587126190 secs.nsecs hits 92573 samples [pages] misses 6183 samples [pages] readpage_not_consecutive 9460 samples [pages] zero_size_window 92575 samples [pages] failed_to_fast_read 6183 samples [pages] readahead_pages 6181 samples [pages] 1 15 92573