== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:07:43 (1786979263)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.4779 s, 6.8 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-ffff8d8f208e0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.305385
Iter 1/10: OSS cache speed: 0.353575
Iter 1/10: ladvise speed: 0.343628
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.298976
Iter 2/10: OSS cache speed: 0.31327
Iter 2/10: ladvise speed: 0.327482
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.304911
Iter 3/10: OSS cache speed: 0.327088
Iter 3/10: ladvise speed: 0.319236
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.29254
Iter 4/10: OSS cache speed: 0.308858
Iter 4/10: ladvise speed: 0.318771
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.251908
Iter 5/10: OSS cache speed: 0.316778
Iter 5/10: ladvise speed: 0.284887
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.26573
Iter 6/10: OSS cache speed: 0.284279
Iter 6/10: ladvise speed: 0.289917
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.26831
Iter 7/10: OSS cache speed: 0.315281
Iter 7/10: ladvise speed: 0.313718
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.325699
Iter 8/10: OSS cache speed: 0.319398
Iter 8/10: ladvise speed: 0.333651
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.320112
Iter 9/10: OSS cache speed: 0.290958
Iter 9/10: ladvise speed: 0.315817
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.297475
Iter 10/10: OSS cache speed: 0.296932
Iter 10/10: ladvise speed: 0.341729
Average uncached read: .29
Average speedup with OSS cached read:  .31 = +6%
Average speedup with ladvise willread:  .31 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0