== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:32:19 (1786757539)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.5604 s, 6.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8fcde03f5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.329199
Iter 1/10: OSS cache speed: 0.363419
Iter 1/10: ladvise speed: 0.349415
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.323167
Iter 2/10: OSS cache speed: 0.373723
Iter 2/10: ladvise speed: 0.394741
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393341
Iter 3/10: OSS cache speed: 0.374684
Iter 3/10: ladvise speed: 0.302149
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.335885
Iter 4/10: OSS cache speed: 0.3932
Iter 4/10: ladvise speed: 0.372749
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.372807
Iter 5/10: OSS cache speed: 0.389557
Iter 5/10: ladvise speed: 0.411574
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.402122
Iter 6/10: OSS cache speed: 0.412121
Iter 6/10: ladvise speed: 0.435679
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.361722
Iter 7/10: OSS cache speed: 0.392559
Iter 7/10: ladvise speed: 0.385812
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389668
Iter 8/10: OSS cache speed: 0.398006
Iter 8/10: ladvise speed: 0.447535
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.381298
Iter 9/10: OSS cache speed: 0.377188
Iter 9/10: ladvise speed: 0.458705
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.335013
Iter 10/10: OSS cache speed: 0.446388
Iter 10/10: ladvise speed: 0.362092
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0