== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:44:02 (1789076642)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.086 s, 7.0 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-ffff994c03658000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.317805
Iter 1/10: OSS cache speed: 0.314747
Iter 1/10: ladvise speed: 0.315363
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.314302
Iter 2/10: OSS cache speed: 0.370622
Iter 2/10: ladvise speed: 0.320004
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.322959
Iter 3/10: OSS cache speed: 0.319465
Iter 3/10: ladvise speed: 0.302319
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.278222
Iter 4/10: OSS cache speed: 0.312234
Iter 4/10: ladvise speed: 0.287183
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.301444
Iter 5/10: OSS cache speed: 0.278319
Iter 5/10: ladvise speed: 0.299667
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.242217
Iter 6/10: OSS cache speed: 0.315217
Iter 6/10: ladvise speed: 0.303696
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.289254
Iter 7/10: OSS cache speed: 0.302107
Iter 7/10: ladvise speed: 0.304124
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.266107
Iter 8/10: OSS cache speed: 0.290472
Iter 8/10: ladvise speed: 0.316425
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.320964
Iter 9/10: OSS cache speed: 0.344153
Iter 9/10: ladvise speed: 0.320454
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320003
Iter 10/10: OSS cache speed: 0.259861
Iter 10/10: ladvise speed: 0.337065
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