== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:24:22 (1780341862)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8903 s, 8.8 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-ffff9151c8c9c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.408245
Iter 1/10: OSS cache speed: 0.426141
Iter 1/10: ladvise speed: 0.439422
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.435403
Iter 2/10: OSS cache speed: 0.482022
Iter 2/10: ladvise speed: 0.485935
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.48123
Iter 3/10: OSS cache speed: 0.491925
Iter 3/10: ladvise speed: 0.51828
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.505463
Iter 4/10: OSS cache speed: 0.500957
Iter 4/10: ladvise speed: 0.553533
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.601738
Iter 5/10: OSS cache speed: 0.396048
Iter 5/10: ladvise speed: 0.31994
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394555
Iter 6/10: OSS cache speed: 0.4178
Iter 6/10: ladvise speed: 0.438109
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.459834
Iter 7/10: OSS cache speed: 0.423413
Iter 7/10: ladvise speed: 0.46047
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.461185
Iter 8/10: OSS cache speed: 0.491258
Iter 8/10: ladvise speed: 0.474626
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.495412
Iter 9/10: OSS cache speed: 0.534386
Iter 9/10: ladvise speed: 0.468861
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.462486
Iter 10/10: OSS cache speed: 0.526779
Iter 10/10: ladvise speed: 0.525964
Average uncached read: .47
Average speedup with OSS cached read:  .46 = +-2%
Average speedup with ladvise willread:  .46 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0