== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:28:37 (1769077717)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5945 s, 7.7 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-ffff98d607de3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346728
Iter 1/10: OSS cache speed: 0.42394
Iter 1/10: ladvise speed: 0.474853
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.323041
Iter 2/10: OSS cache speed: 0.390683
Iter 2/10: ladvise speed: 0.394022
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.357125
Iter 3/10: OSS cache speed: 0.351926
Iter 3/10: ladvise speed: 0.480619
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.427658
Iter 4/10: OSS cache speed: 0.428465
Iter 4/10: ladvise speed: 0.522298
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.37245
Iter 5/10: OSS cache speed: 0.449738
Iter 5/10: ladvise speed: 0.449061
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.377541
Iter 6/10: OSS cache speed: 0.376611
Iter 6/10: ladvise speed: 0.437607
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.379467
Iter 7/10: OSS cache speed: 0.408359
Iter 7/10: ladvise speed: 0.47678
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.509564
Iter 8/10: OSS cache speed: 0.54356
Iter 8/10: ladvise speed: 0.544028
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.531448
Iter 9/10: OSS cache speed: 0.535732
Iter 9/10: ladvise speed: 0.608872
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.65481
Iter 10/10: OSS cache speed: 0.65876
Iter 10/10: ladvise speed: 0.627407
Average uncached read: .42
Average speedup with OSS cached read:  .45 = +7%
Average speedup with ladvise willread:  .50 = +19%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0