== sanity test 101a: check read-ahead for random reads === 20:26:24 (1770686784) nreads: 10000 file size: 96MB 122.179210s, 5.36392MB/s osc.lustre-OST0000-osc-ffff936fc5917000.rpc_stats= snapshot_time: 1770686920.302500851 secs.nsecs start_time: 1770686785.581888068 secs.nsecs elapsed_time: 134.720612783 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 3 3 2: 0 0 0 | 0 0 3 4: 1 0 0 | 0 0 3 8: 3 0 0 | 0 0 3 16: 6562 99 100 | 0 0 3 32: 0 0 100 | 0 0 3 64: 0 0 100 | 0 0 3 128: 0 0 100 | 0 0 3 256: 0 0 100 | 0 0 3 512: 0 0 100 | 0 0 3 1024: 0 0 100 | 25 96 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 6566 100 100 | 26 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 4 0 0 | 2 7 7 1: 0 0 0 | 0 0 7 2: 0 0 0 | 0 0 7 4: 0 0 0 | 0 0 7 8: 0 0 0 | 0 0 7 16: 5 0 0 | 0 0 7 32: 7 0 0 | 0 0 7 64: 22 0 0 | 0 0 7 128: 31 0 1 | 0 0 7 256: 70 1 2 | 0 0 7 512: 137 2 4 | 0 0 7 1024: 258 3 8 | 1 3 11 2048: 551 8 16 | 2 7 19 4096: 1092 16 33 | 4 15 34 8192: 2152 32 65 | 8 30 65 16384: 2237 34 100 | 9 34 100 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: 18 0 0 | 0 0 0 4096: 2524 38 38 | 0 0 0 8192: 3742 56 95 | 1 3 3 16384: 436 6 102 | 0 0 3 32768: 2 0 102 | 16 61 65 65536: 0 0 102 | 8 30 96 131072: 0 0 102 | 1 3 100 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-ffff936fc5917000.rpc_stats= snapshot_time: 1770686920.302635587 secs.nsecs start_time: 1770686785.581917663 secs.nsecs elapsed_time: 134.720717924 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 | 3 75 75 2: 0 0 0 | 0 0 75 4: 0 0 0 | 0 0 75 8: 0 0 0 | 1 25 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 50 50 2: 0 0 0 | 1 25 75 3: 0 0 0 | 1 25 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 4 100 100 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 | 0 0 0 4096: 0 0 0 | 0 0 0 8192: 0 0 0 | 4 100 100 llite.lustre-ffff936fc5917000.read_ahead_stats= snapshot_time 1770686920.311747073 secs.nsecs start_time 1770686785.598132412 secs.nsecs elapsed_time 134.713614661 secs.nsecs hits 98418 samples [pages] misses 6566 samples [pages] readpage_not_consecutive 9991 samples [pages] failed_grab_cache_page 14 samples [pages] zero_size_window 98414 samples [pages] failed_to_reach_end 4 samples [pages] failed_to_fast_read 6566 samples [pages] readahead_pages 6566 samples [pages] 3 15 98418