== sanity test 101a: check read-ahead for random reads === 11:01:09 (1787842869) nreads: 10000 file size: 96MB 180.163815s, 2.97809MB/s osc.lustre-OST0000-osc-ffff948650a26000.rpc_stats= snapshot_time: 1787843074.092318558 secs.nsecs start_time: 1787842871.293536580 secs.nsecs elapsed_time: 202.798781978 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 | 2 7 7 2: 5 0 0 | 0 0 7 4: 2 0 0 | 0 0 7 8: 5 0 0 | 0 0 7 16: 5347 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: 5358 99 99 | 26 96 96 2: 1 0 100 | 1 3 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 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: 4 0 0 | 0 0 11 32: 7 0 0 | 0 0 11 64: 15 0 0 | 0 0 11 128: 23 0 1 | 0 0 11 256: 54 1 2 | 0 0 11 512: 114 2 4 | 0 0 11 1024: 199 3 7 | 1 3 14 2048: 460 8 16 | 2 7 22 4096: 878 16 32 | 4 14 37 8192: 1750 32 65 | 8 29 66 16384: 1849 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: 149 2 2 | 0 0 0 8192: 2642 49 52 | 0 0 0 16384: 2205 41 93 | 0 0 0 32768: 461 8 101 | 4 14 14 65536: 27 0 102 | 19 70 85 131072: 0 0 102 | 4 14 100 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-ffff948650a26000.rpc_stats= snapshot_time: 1787843074.092501099 secs.nsecs start_time: 1787842871.293712768 secs.nsecs elapsed_time: 202.798788331 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 | 2 66 66 2: 0 0 0 | 0 0 66 4: 0 0 0 | 0 0 66 8: 0 0 0 | 1 33 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 66 66 2: 0 0 0 | 1 33 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 3 100 100 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 | 1 33 33 16384: 0 0 0 | 0 0 33 32768: 0 0 0 | 2 66 100 llite.lustre-ffff948650a26000.read_ahead_stats= snapshot_time 1787843074.106409752 secs.nsecs start_time 1787842871.335727240 secs.nsecs elapsed_time 202.770682512 secs.nsecs hits 80210 samples [pages] misses 5358 samples [pages] readpage_not_consecutive 8182 samples [pages] failed_grab_cache_page 6 samples [pages] zero_size_window 80208 samples [pages] failed_to_reach_end 2 samples [pages] failed_to_fast_read 5357 samples [pages] readahead_pages 5359 samples [pages] 1 15 80210