== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:24:57 (1774877097)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4855 s, 7.8 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-ffff92c4444ce000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379277
Iter 1/10: OSS cache speed: 0.476043
Iter 1/10: ladvise speed: 0.454745
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.453828
Iter 2/10: OSS cache speed: 0.405172
Iter 2/10: ladvise speed: 0.416656
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.449452
Iter 3/10: OSS cache speed: 0.470293
Iter 3/10: ladvise speed: 0.414616
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.363366
Iter 4/10: OSS cache speed: 0.39471
Iter 4/10: ladvise speed: 0.372079
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.312634
Iter 5/10: OSS cache speed: 0.346646
Iter 5/10: ladvise speed: 0.353245
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.371521
Iter 6/10: OSS cache speed: 0.42402
Iter 6/10: ladvise speed: 0.356756
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.428217
Iter 7/10: OSS cache speed: 0.382306
Iter 7/10: ladvise speed: 0.436262
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.354311
Iter 8/10: OSS cache speed: 0.392699
Iter 8/10: ladvise speed: 0.398647
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.317022
Iter 9/10: OSS cache speed: 0.380176
Iter 9/10: ladvise speed: 0.422589
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364487
Iter 10/10: OSS cache speed: 0.324284
Iter 10/10: ladvise speed: 0.343829
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0