== sanity test 101a: check read-ahead for random reads === 13:36:29 (1726853789) nreads: 10000 file size: 96MB 66.299131s, 9.8849MB/s osc.lustre-OST0000-osc-ffff8800aafdc800.rpc_stats= snapshot_time: 1726853861.762909392 secs.nsecs start_time: 1726853789.987335399 secs.nsecs elapsed_time: 71.775573993 secs.nsecs read RPCs in flight: 0 write 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 | 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 osc.lustre-OST0001-osc-ffff8800aafdc800.rpc_stats= snapshot_time: 1726853861.764544758 secs.nsecs start_time: 1726853789.987402418 secs.nsecs elapsed_time: 71.777142340 secs.nsecs read RPCs in flight: 0 write 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 | 1 0 0 2: 0 0 0 | 1 0 1 4: 1 0 0 | 0 0 1 8: 3 0 0 | 1 0 2 16: 5039 99 100 | 0 0 2 32: 0 0 100 | 0 0 2 64: 0 0 100 | 0 0 2 128: 0 0 100 | 0 0 2 256: 0 0 100 | 100 97 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5038 99 99 | 101 98 98 2: 7 0 100 | 1 0 99 3: 0 0 100 | 1 0 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 4 3 3 1: 0 0 0 | 0 0 3 2: 0 0 0 | 0 0 3 4: 0 0 0 | 0 0 3 8: 0 0 0 | 0 0 3 16: 4 0 0 | 0 0 3 32: 6 0 0 | 0 0 3 64: 16 0 0 | 0 0 3 128: 26 0 1 | 0 0 3 256: 53 1 2 | 1 0 4 512: 109 2 4 | 2 1 6 1024: 207 4 8 | 4 3 10 2048: 427 8 16 | 8 7 18 4096: 858 17 33 | 16 15 33 8192: 1680 33 67 | 32 31 65 16384: 1656 32 100 | 36 34 100 llite.lustre-ffff8800aafdc800.read_ahead_stats= snapshot_time 1726853861.775112875 secs.nsecs start_time 1726853790.001096635 secs.nsecs elapsed_time 71.774016240 secs.nsecs hits 75576 samples [pages] misses 5045 samples [pages] readpage_not_consecutive 9991 samples [pages] failed_grab_cache_page 4 samples [pages] zero_size_window 75576 samples [pages] failed_to_reach_end 1 samples [pages] failed_to_fast_read 5045 samples [pages] readahead_pages 5043 samples [pages] 2 15 75576