== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:40:42 (1787395242)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5767 s, 6.7 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-ffff940a203b2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.315308
Iter 1/10: OSS cache speed: 0.428722
Iter 1/10: ladvise speed: 0.380971
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.476644
Iter 2/10: OSS cache speed: 0.44626
Iter 2/10: ladvise speed: 0.421316
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.453333
Iter 3/10: OSS cache speed: 0.482477
Iter 3/10: ladvise speed: 0.434988
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355461
Iter 4/10: OSS cache speed: 0.328976
Iter 4/10: ladvise speed: 0.340931
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409031
Iter 5/10: OSS cache speed: 0.423058
Iter 5/10: ladvise speed: 0.380269
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.358699
Iter 6/10: OSS cache speed: 0.320621
Iter 6/10: ladvise speed: 0.33763
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.353526
Iter 7/10: OSS cache speed: 0.362997
Iter 7/10: ladvise speed: 0.353369
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.356715
Iter 8/10: OSS cache speed: 0.376986
Iter 8/10: ladvise speed: 0.337973
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.349623
Iter 9/10: OSS cache speed: 0.403795
Iter 9/10: ladvise speed: 0.409944
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.384886
Iter 10/10: OSS cache speed: 0.400944
Iter 10/10: ladvise speed: 0.487432
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0