== sanity test 101a: check read-ahead for random reads === 17:47:31 (1785880051) nreads: 10000 file size: 96MB 180.979223s, 2.16004MB/s osc.lustre-OST0000-osc-ffff9f9c50a3e800.rpc_stats= snapshot_time: 1785880266.270963449 secs.nsecs start_time: 1785880053.574960164 secs.nsecs elapsed_time: 212.696003285 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 | 1 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 1 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 1 100 100 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 | 0 0 0 16384: 0 0 0 | 1 100 100 osc.lustre-OST0001-osc-ffff9f9c50a3e800.rpc_stats= snapshot_time: 1785880266.271075441 secs.nsecs start_time: 1785880053.574987617 secs.nsecs elapsed_time: 212.696087824 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: 1 0 0 | 0 0 3 4: 1 0 0 | 0 0 3 8: 7 0 0 | 1 3 7 16: 3888 99 100 | 0 0 7 32: 0 0 100 | 0 0 7 64: 0 0 100 | 0 0 7 128: 0 0 100 | 0 0 7 256: 0 0 100 | 0 0 7 512: 0 0 100 | 0 0 7 1024: 0 0 100 | 25 92 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 3896 99 99 | 26 96 96 2: 1 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 4 0 0 | 3 11 11 1: 0 0 0 | 0 0 11 2: 0 0 0 | 0 0 11 4: 0 0 0 | 0 0 11 8: 0 0 0 | 0 0 11 16: 3 0 0 | 0 0 11 32: 6 0 0 | 0 0 11 64: 11 0 0 | 0 0 11 128: 18 0 1 | 0 0 11 256: 38 0 2 | 0 0 11 512: 84 2 4 | 0 0 11 1024: 148 3 8 | 1 3 14 2048: 335 8 16 | 2 7 22 4096: 636 16 32 | 4 14 37 8192: 1265 32 65 | 8 29 66 16384: 1349 34 100 | 9 33 100 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: 228 5 5 | 0 0 0 8192: 1284 32 38 | 0 0 0 16384: 1492 38 77 | 0 0 0 32768: 833 21 98 | 2 7 7 65536: 150 3 102 | 14 51 59 131072: 1 0 102 | 10 37 96 262144: 0 0 102 | 1 3 100 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 llite.lustre-ffff9f9c50a3e800.read_ahead_stats= snapshot_time 1785880266.341597411 secs.nsecs start_time 1785880053.601632299 secs.nsecs elapsed_time 212.739965112 secs.nsecs hits 58334 samples [pages] misses 3897 samples [pages] readpage_not_consecutive 5962 samples [pages] zero_size_window 58334 samples [pages] failed_to_fast_read 3897 samples [pages] readahead_pages 3897 samples [pages] 1 15 58334