== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:26:01 (1786634761)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6105 s, 7.2 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-ffff8e84908b9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.316561
Iter 1/10: OSS cache speed: 0.295544
Iter 1/10: ladvise speed: 0.298233
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.342788
Iter 2/10: OSS cache speed: 0.337433
Iter 2/10: ladvise speed: 0.318315
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.308271
Iter 3/10: OSS cache speed: 0.359808
Iter 3/10: ladvise speed: 0.331185
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.32158
Iter 4/10: OSS cache speed: 0.344437
Iter 4/10: ladvise speed: 0.280929
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332007
Iter 5/10: OSS cache speed: 0.309771
Iter 5/10: ladvise speed: 0.343822
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.322043
Iter 6/10: OSS cache speed: 0.302314
Iter 6/10: ladvise speed: 0.305133
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.34576
Iter 7/10: OSS cache speed: 0.329417
Iter 7/10: ladvise speed: 0.326846
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.306098
Iter 8/10: OSS cache speed: 0.292436
Iter 8/10: ladvise speed: 0.352819
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.299358
Iter 9/10: OSS cache speed: 0.320237
Iter 9/10: ladvise speed: 0.319348
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.325395
Iter 10/10: OSS cache speed: 0.331073
Iter 10/10: ladvise speed: 0.319446
Average uncached read: .32
Average speedup with OSS cached read:  .32 = +0%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0