== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:08:35 (1787497715)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8148 s, 8.2 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-ffff9b930568a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.410452
Iter 1/10: OSS cache speed: 0.417081
Iter 1/10: ladvise speed: 0.426303
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.432185
Iter 2/10: OSS cache speed: 0.470735
Iter 2/10: ladvise speed: 0.433864
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393355
Iter 3/10: OSS cache speed: 0.455315
Iter 3/10: ladvise speed: 0.464031
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.348057
Iter 4/10: OSS cache speed: 0.41028
Iter 4/10: ladvise speed: 0.367547
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.38372
Iter 5/10: OSS cache speed: 0.444084
Iter 5/10: ladvise speed: 0.408294
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.326879
Iter 6/10: OSS cache speed: 0.355041
Iter 6/10: ladvise speed: 0.434945
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.326305
Iter 7/10: OSS cache speed: 0.399346
Iter 7/10: ladvise speed: 0.344646
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.408398
Iter 8/10: OSS cache speed: 0.422194
Iter 8/10: ladvise speed: 0.454626
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.424994
Iter 9/10: OSS cache speed: 0.47283
Iter 9/10: ladvise speed: 0.421937
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.42056
Iter 10/10: OSS cache speed: 0.439523
Iter 10/10: ladvise speed: 0.442548
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0