== sanity test 101a: check read-ahead for random reads === 21:09:02 (1786669742) nreads: 10000 file size: 96MB 180.148295s, 2.91832MB/s osc.lustre-OST0000-osc-ffff8e6173426000.rpc_stats= snapshot_time: 1786669944.067605780 secs.nsecs start_time: 1786669744.434090299 secs.nsecs elapsed_time: 199.633515481 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: 5 0 0 | 0 0 0 8: 3 0 0 | 0 0 0 16: 5252 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: 5261 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 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: 4 0 0 | 0 0 4 32: 7 0 0 | 0 0 4 64: 15 0 0 | 0 0 4 128: 23 0 1 | 0 0 4 256: 53 1 2 | 0 0 4 512: 112 2 4 | 0 0 4 1024: 197 3 7 | 1 4 8 2048: 455 8 16 | 2 8 16 4096: 867 16 33 | 4 16 32 8192: 1714 32 65 | 8 32 64 16384: 1808 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: 282 5 5 | 0 0 0 8192: 2615 49 55 | 0 0 0 16384: 1898 36 91 | 0 0 0 32768: 539 10 101 | 3 12 12 65536: 51 0 102 | 21 84 96 131072: 0 0 102 | 1 4 100 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-ffff8e6173426000.rpc_stats= snapshot_time: 1786669944.068451862 secs.nsecs start_time: 1786669744.434130822 secs.nsecs elapsed_time: 199.634321040 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-ffff8e6173426000.read_ahead_stats= snapshot_time 1786669944.074271132 secs.nsecs start_time 1786669744.442979846 secs.nsecs elapsed_time 199.631291286 secs.nsecs hits 78780 samples [pages] misses 5261 samples [pages] readpage_not_consecutive 8017 samples [pages] zero_size_window 78780 samples [pages] failed_to_fast_read 5261 samples [pages] readahead_pages 5261 samples [pages] 1 15 78780