== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:31:10 (1786192270)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.0851 s, 14.8 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-ffff9e3f0326f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.605004
Iter 1/10: OSS cache speed: 0.615194
Iter 1/10: ladvise speed: 0.65701
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.577314
Iter 2/10: OSS cache speed: 0.577197
Iter 2/10: ladvise speed: 0.663093
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.748556
Iter 3/10: OSS cache speed: 0.69333
Iter 3/10: ladvise speed: 0.692475
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.758834
Iter 4/10: OSS cache speed: 0.818536
Iter 4/10: ladvise speed: 0.787731
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.787805
Iter 5/10: OSS cache speed: 1.08298
Iter 5/10: ladvise speed: 1.37598
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.30134
Iter 6/10: OSS cache speed: 1.16319
Iter 6/10: ladvise speed: 1.34281
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.5707
Iter 7/10: OSS cache speed: 2.01537
Iter 7/10: ladvise speed: 2.03646
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.88502
Iter 8/10: OSS cache speed: 1.75539
Iter 8/10: ladvise speed: 2.03011
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.98551
Iter 9/10: OSS cache speed: 1.81598
Iter 9/10: ladvise speed: 1.83442
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.03253
Iter 10/10: OSS cache speed: 1.86325
Iter 10/10: ladvise speed: 1.87624
Average uncached read: 1.22
Average speedup with OSS cached read:  1.24 = +1%
Average speedup with ladvise willread:  1.32 = +8%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0