== sanity test 101a: check read-ahead for random reads === 19:20:09 (1753744809) nreads: 10000 file size: 96MB 154.683160s, 4.23679MB/s osc.lustre-OST0000-osc-ffff8a7286980000.rpc_stats= snapshot_time: 1753744981.775715907 secs.nsecs start_time: 1753744811.360363648 secs.nsecs elapsed_time: 170.415352259 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: 5 0 0 | 0 0 0 16: 6490 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: 6485 99 99 | 25 100 100 2: 12 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: 5 0 0 | 0 0 4 32: 8 0 0 | 0 0 4 64: 19 0 0 | 0 0 4 128: 32 0 1 | 0 0 4 256: 69 1 2 | 0 0 4 512: 132 2 4 | 0 0 4 1024: 250 3 8 | 1 4 8 2048: 555 8 16 | 2 8 16 4096: 1073 16 33 | 4 16 32 8192: 2137 32 65 | 8 32 64 16384: 2212 34 100 | 9 36 100 osc.lustre-OST0001-osc-ffff8a7286980000.rpc_stats= snapshot_time: 1753744981.775812201 secs.nsecs start_time: 1753744811.360392356 secs.nsecs elapsed_time: 170.415419845 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 llite.lustre-ffff8a7286980000.read_ahead_stats= snapshot_time 1753744981.788292212 secs.nsecs start_time 1753744811.375335347 secs.nsecs elapsed_time 170.412956865 secs.nsecs hits 97368 samples [pages] misses 6497 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 97369 samples [pages] failed_to_fast_read 6497 samples [pages] readahead_pages 6496 samples [pages] 3 15 97368