== sanity test 101a: check read-ahead for random reads === 21:21:02 (1786756862) nreads: 10000 file size: 96MB 180.487688s, 2.90121MB/s osc.lustre-OST0000-osc-ffff980d49493000.rpc_stats= snapshot_time: 1786757071.118070613 secs.nsecs start_time: 1786756864.848976227 secs.nsecs elapsed_time: 206.269094386 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 2: 1 0 0 | 0 0 0 4: 2 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 5221 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: 5228 100 100 | 25 100 100 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: 7 0 0 | 0 0 4 64: 15 0 0 | 0 0 4 128: 22 0 1 | 0 0 4 256: 53 1 2 | 0 0 4 512: 110 2 4 | 0 0 4 1024: 196 3 7 | 1 4 8 2048: 454 8 16 | 2 8 16 4096: 869 16 33 | 4 16 32 8192: 1693 32 65 | 8 32 64 16384: 1799 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: 235 4 4 | 0 0 0 8192: 2641 50 55 | 0 0 0 16384: 1940 37 92 | 0 0 0 32768: 499 9 101 | 0 0 0 65536: 34 0 102 | 12 48 48 131072: 1 0 102 | 12 48 96 262144: 0 0 102 | 1 4 100 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-ffff980d49493000.rpc_stats= snapshot_time: 1786757071.118471193 secs.nsecs start_time: 1786756864.849032562 secs.nsecs elapsed_time: 206.269438631 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-ffff980d49493000.read_ahead_stats= snapshot_time 1786757071.140427319 secs.nsecs start_time 1786756864.864373433 secs.nsecs elapsed_time 206.276053886 secs.nsecs hits 78321 samples [pages] misses 5228 samples [pages] readpage_not_consecutive 7985 samples [pages] zero_size_window 78321 samples [pages] failed_to_fast_read 5228 samples [pages] readahead_pages 5228 samples [pages] 1 15 78321