== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:42:57 (1778654577)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3919 s, 7.8 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-ffff9533c7793000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.296733
Iter 1/10: OSS cache speed: 0.336624
Iter 1/10: ladvise speed: 0.331217
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.345623
Iter 2/10: OSS cache speed: 0.338846
Iter 2/10: ladvise speed: 0.301678
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.242275
Iter 3/10: OSS cache speed: 0.291184
Iter 3/10: ladvise speed: 0.283827
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.337299
Iter 4/10: OSS cache speed: 0.304616
Iter 4/10: ladvise speed: 0.314777
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.343764
Iter 5/10: OSS cache speed: 0.337742
Iter 5/10: ladvise speed: 0.348618
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.364686
Iter 6/10: OSS cache speed: 0.334107
Iter 6/10: ladvise speed: 0.383488
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388353
Iter 7/10: OSS cache speed: 0.382544
Iter 7/10: ladvise speed: 0.267929
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.348633
Iter 8/10: OSS cache speed: 0.381852
Iter 8/10: ladvise speed: 0.344532
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.31926
Iter 9/10: OSS cache speed: 0.356958
Iter 9/10: ladvise speed: 0.268499
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.324171
Iter 10/10: OSS cache speed: 0.321688
Iter 10/10: ladvise speed: 0.28755
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .31 = +-6%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0