== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:11:02 (1780337462)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5793 s, 9.1 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-ffff9cdc206e8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385989
Iter 1/10: OSS cache speed: 0.328195
Iter 1/10: ladvise speed: 0.336448
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.348834
Iter 2/10: OSS cache speed: 0.341751
Iter 2/10: ladvise speed: 0.333036
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.360261
Iter 3/10: OSS cache speed: 0.397652
Iter 3/10: ladvise speed: 0.379105
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.395835
Iter 4/10: OSS cache speed: 0.337577
Iter 4/10: ladvise speed: 0.364902
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.363577
Iter 5/10: OSS cache speed: 0.379097
Iter 5/10: ladvise speed: 0.381497
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.408776
Iter 6/10: OSS cache speed: 0.414937
Iter 6/10: ladvise speed: 0.387799
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.430527
Iter 7/10: OSS cache speed: 0.388429
Iter 7/10: ladvise speed: 0.404112
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.397243
Iter 8/10: OSS cache speed: 0.36129
Iter 8/10: ladvise speed: 0.383799
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.413529
Iter 9/10: OSS cache speed: 0.322596
Iter 9/10: ladvise speed: 0.353729
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.37839
Iter 10/10: OSS cache speed: 0.353342
Iter 10/10: ladvise speed: 0.390635
Average uncached read: .38
Average speedup with OSS cached read:  .36 = +-5%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0