== sanity test 101a: check read-ahead for random reads === 18:52:02 (1786402322) nreads: 10000 file size: 96MB 180.745532s, 3.61101MB/s osc.lustre-OST0000-osc-ffffa06551d8b800.rpc_stats= snapshot_time: 1786402525.070570893 secs.nsecs start_time: 1786402323.789743758 secs.nsecs elapsed_time: 201.280827135 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: 0 0 0 | 0 0 3 4: 4 0 0 | 0 0 3 8: 2 0 0 | 0 0 3 16: 6496 99 100 | 0 0 3 32: 0 0 100 | 0 0 3 64: 0 0 100 | 0 0 3 128: 0 0 100 | 0 0 3 256: 0 0 100 | 0 0 3 512: 0 0 100 | 0 0 3 1024: 0 0 100 | 25 96 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 6501 99 99 | 26 100 100 2: 1 0 100 | 0 0 100 read write offset rpcs % cum % | rpcs % cum % 0: 6 0 0 | 2 7 7 1: 0 0 0 | 0 0 7 2: 0 0 0 | 0 0 7 4: 0 0 0 | 0 0 7 8: 0 0 0 | 0 0 7 16: 5 0 0 | 0 0 7 32: 8 0 0 | 0 0 7 64: 19 0 0 | 0 0 7 128: 32 0 1 | 0 0 7 256: 71 1 2 | 0 0 7 512: 131 2 4 | 0 0 7 1024: 248 3 7 | 1 3 11 2048: 547 8 16 | 2 7 19 4096: 1064 16 32 | 4 15 34 8192: 2135 32 65 | 8 30 65 16384: 2236 34 100 | 9 34 100 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: 907 13 13 | 0 0 0 8192: 4294 66 79 | 0 0 0 16384: 1078 16 96 | 1 3 3 32768: 256 3 100 | 4 15 19 65536: 98 1 102 | 7 26 46 131072: 22 0 102 | 13 50 96 262144: 1 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 osc.lustre-OST0001-osc-ffffa06551d8b800.rpc_stats= snapshot_time: 1786402525.070705434 secs.nsecs start_time: 1786402323.789785695 secs.nsecs elapsed_time: 201.280919739 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 | 3 75 75 2: 0 0 0 | 0 0 75 4: 0 0 0 | 0 0 75 8: 0 0 0 | 1 25 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 2 50 50 2: 0 0 0 | 2 50 100 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 4 100 100 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 25 25 16384: 0 0 0 | 1 25 50 32768: 0 0 0 | 0 0 50 65536: 0 0 0 | 0 0 50 131072: 0 0 0 | 1 25 75 262144: 0 0 0 | 1 25 100 llite.lustre-ffffa06551d8b800.read_ahead_stats= snapshot_time 1786402525.093053824 secs.nsecs start_time 1786402323.799074522 secs.nsecs elapsed_time 201.293979302 secs.nsecs hits 97424 samples [pages] misses 6502 samples [pages] readpage_not_consecutive 9951 samples [pages] zero_size_window 97424 samples [pages] failed_to_fast_read 6502 samples [pages] readahead_pages 6502 samples [pages] 2 15 97424