== sanity test 101a: check read-ahead for random reads === 10:32:23 (1781274743) nreads: 10000 file size: 96MB 180.297448s, 3.03513MB/s osc.lustre-OST0000-osc-ffff952b981d9000.rpc_stats= snapshot_time: 1781274943.146437320 secs.nsecs start_time: 1781274745.110692233 secs.nsecs elapsed_time: 198.035745087 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-ffff952b981d9000.rpc_stats= snapshot_time: 1781274943.146517156 secs.nsecs start_time: 1781274745.110719746 secs.nsecs elapsed_time: 198.035797410 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: 1 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 1 0 0 | 0 0 0 8: 2 0 0 | 0 0 0 16: 5541 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: 5545 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 4 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: 6 0 0 | 0 0 4 64: 18 0 0 | 0 0 4 128: 25 0 1 | 0 0 4 256: 53 0 2 | 0 0 4 512: 118 2 4 | 0 0 4 1024: 209 3 7 | 1 4 8 2048: 472 8 16 | 2 8 16 4096: 911 16 32 | 4 16 32 8192: 1806 32 65 | 8 32 64 16384: 1918 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: 338 6 6 | 0 0 0 8192: 2899 52 58 | 0 0 0 16384: 1925 34 93 | 0 0 0 32768: 471 8 101 | 1 4 4 65536: 41 0 102 | 20 80 84 131072: 1 0 102 | 4 16 100 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-ffff952b981d9000.read_ahead_stats= snapshot_time 1781274943.175538398 secs.nsecs start_time 1781274745.139689720 secs.nsecs elapsed_time 198.035848678 secs.nsecs hits 83089 samples [pages] misses 5545 samples [pages] readpage_not_consecutive 8345 samples [pages] zero_size_window 83090 samples [pages] failed_to_fast_read 5545 samples [pages] readahead_pages 5544 samples [pages] 3 15 83089