== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:32:45 (1788611565)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0316 s, 10.5 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-ffff8a0443da6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368218
Iter 1/10: OSS cache speed: 0.375741
Iter 1/10: ladvise speed: 0.357613
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.385765
Iter 2/10: OSS cache speed: 0.438125
Iter 2/10: ladvise speed: 0.376029
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.421159
Iter 3/10: OSS cache speed: 0.392348
Iter 3/10: ladvise speed: 0.368542
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382831
Iter 4/10: OSS cache speed: 0.455618
Iter 4/10: ladvise speed: 0.339621
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.393856
Iter 5/10: OSS cache speed: 0.355453
Iter 5/10: ladvise speed: 0.395687
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.314848
Iter 6/10: OSS cache speed: 0.383648
Iter 6/10: ladvise speed: 0.397297
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.333312
Iter 7/10: OSS cache speed: 0.412525
Iter 7/10: ladvise speed: 0.338517
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.358575
Iter 8/10: OSS cache speed: 0.410739
Iter 8/10: ladvise speed: 0.350952
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.345311
Iter 9/10: OSS cache speed: 0.393146
Iter 9/10: ladvise speed: 0.416495
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.34639
Iter 10/10: OSS cache speed: 0.375026
Iter 10/10: ladvise speed: 0.436816
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0