== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:21:46 (1789132906)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.8662 s, 7.1 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-ffff979285127000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364298
Iter 1/10: OSS cache speed: 0.36382
Iter 1/10: ladvise speed: 0.330833
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.333807
Iter 2/10: OSS cache speed: 0.374895
Iter 2/10: ladvise speed: 0.312295
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.316436
Iter 3/10: OSS cache speed: 0.419806
Iter 3/10: ladvise speed: 0.39798
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.421847
Iter 4/10: OSS cache speed: 0.327767
Iter 4/10: ladvise speed: 0.312512
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.400233
Iter 5/10: OSS cache speed: 0.40849
Iter 5/10: ladvise speed: 0.471774
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.363132
Iter 6/10: OSS cache speed: 0.438832
Iter 6/10: ladvise speed: 0.344949
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.428046
Iter 7/10: OSS cache speed: 0.400503
Iter 7/10: ladvise speed: 0.425955
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.332809
Iter 8/10: OSS cache speed: 0.346791
Iter 8/10: ladvise speed: 0.375664
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.380143
Iter 9/10: OSS cache speed: 0.370517
Iter 9/10: ladvise speed: 0.344497
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354457
Iter 10/10: OSS cache speed: 0.313824
Iter 10/10: ladvise speed: 0.381433
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0