== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:11:38 (1786734698)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6471 s, 7.7 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-ffff931fd09a9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.349439
Iter 1/10: OSS cache speed: 0.373683
Iter 1/10: ladvise speed: 0.36698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.295079
Iter 2/10: OSS cache speed: 0.302077
Iter 2/10: ladvise speed: 0.379254
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.185548
Iter 3/10: OSS cache speed: 0.293774
Iter 3/10: ladvise speed: 0.314381
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.313535
Iter 4/10: OSS cache speed: 0.286267
Iter 4/10: ladvise speed: 0.31259
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.309041
Iter 5/10: OSS cache speed: 0.403709
Iter 5/10: ladvise speed: 0.346645
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.327952
Iter 6/10: OSS cache speed: 0.340351
Iter 6/10: ladvise speed: 0.361613
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.355891
Iter 7/10: OSS cache speed: 0.384633
Iter 7/10: ladvise speed: 0.341961
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.332616
Iter 8/10: OSS cache speed: 0.26905
Iter 8/10: ladvise speed: 0.348723
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.304759
Iter 9/10: OSS cache speed: 0.368878
Iter 9/10: ladvise speed: 0.323547
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.328352
Iter 10/10: OSS cache speed: 0.348244
Iter 10/10: ladvise speed: 0.331629
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .34 = +9%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0