== sanity test 101a: check read-ahead for random reads === 20:19:33 (1788653973) nreads: 10000 file size: 96MB 142.871534s, 4.58706MB/s osc.lustre-OST0000-osc-ffff94d28abba000.rpc_stats= snapshot_time: 1788654134.377909235 secs.nsecs start_time: 1788653975.599471410 secs.nsecs elapsed_time: 158.778437825 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 | 0 0 0 16384: 0 0 0 | 2 66 66 32768: 0 0 0 | 1 33 100 osc.lustre-OST0001-osc-ffff94d28abba000.rpc_stats= snapshot_time: 1788654134.378004920 secs.nsecs start_time: 1788653975.599501058 secs.nsecs elapsed_time: 158.778503862 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: 1 0 0 | 2 1 1 2: 0 0 0 | 0 0 1 4: 1 0 0 | 0 0 1 8: 4 0 0 | 0 0 1 16: 5045 99 100 | 0 0 1 32: 0 0 100 | 0 0 1 64: 0 0 100 | 0 0 1 128: 0 0 100 | 0 0 1 256: 0 0 100 | 100 98 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 5051 100 100 | 99 97 97 2: 0 0 100 | 3 2 100 read write offset rpcs % cum % | rpcs % cum % 0: 3 0 0 | 3 2 2 1: 0 0 0 | 0 0 2 2: 0 0 0 | 0 0 2 4: 0 0 0 | 0 0 2 8: 0 0 0 | 0 0 2 16: 4 0 0 | 0 0 2 32: 6 0 0 | 0 0 2 64: 16 0 0 | 0 0 2 128: 26 0 1 | 0 0 2 256: 53 1 2 | 1 0 3 512: 107 2 4 | 2 1 5 1024: 207 4 8 | 4 3 9 2048: 426 8 16 | 8 7 17 4096: 853 16 33 | 16 15 33 8192: 1679 33 66 | 32 31 64 16384: 1671 33 100 | 36 35 100 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: 186 3 3 | 0 0 0 8192: 3064 60 64 | 0 0 0 16384: 1747 34 98 | 51 50 50 32768: 168 3 102 | 50 49 99 65536: 4 0 102 | 2 1 100 131072: 0 0 102 | 1 0 101 262144: 0 0 102 | 0 0 101 524288: 0 0 102 | 0 0 101 1048576: 0 0 102 | 0 0 101 2097152: 0 0 102 | 0 0 101 4194304: 0 0 102 | 0 0 101 8388608: 0 0 102 | 0 0 101 16777216: 0 0 102 | 0 0 101 33554432: 0 0 102 | 0 0 101 67108864: 0 0 102 | 0 0 101 134217728: 0 0 102 | 0 0 101 268435456: 0 0 102 | 0 0 101 536870912: 0 0 102 | 0 0 101 1073741824: 0 0 102 | 0 0 101 llite.lustre-ffff94d28abba000.read_ahead_stats= snapshot_time 1788654134.391962414 secs.nsecs start_time 1788653975.614374842 secs.nsecs elapsed_time 158.777587572 secs.nsecs hits 75661 samples [pages] misses 5051 samples [pages] readpage_not_consecutive 9991 samples [pages] zero_size_window 75662 samples [pages] failed_to_fast_read 5051 samples [pages] readahead_pages 5050 samples [pages] 3 15 75661