== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:54:10 (1790099650)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.24785 s, 14.5 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-ffff9441c5310800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.607829
Iter 1/10: OSS cache speed: 0.659534
Iter 1/10: ladvise speed: 1.06898
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.27435
Iter 2/10: OSS cache speed: 1.25033
Iter 2/10: ladvise speed: 1.32535
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.417855
Iter 3/10: OSS cache speed: 0.473944
Iter 3/10: ladvise speed: 0.551423
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.476691
Iter 4/10: OSS cache speed: 0.55608
Iter 4/10: ladvise speed: 0.206793
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.265659
Iter 5/10: OSS cache speed: 0.343734
Iter 5/10: ladvise speed: 0.37476
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.333473
Iter 6/10: OSS cache speed: 0.345248
Iter 6/10: ladvise speed: 0.380629
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.319706
Iter 7/10: OSS cache speed: 0.402718
Iter 7/10: ladvise speed: 0.409573
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.358
Iter 8/10: OSS cache speed: 0.435404
Iter 8/10: ladvise speed: 0.426402
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.368896
Iter 9/10: OSS cache speed: 0.370882
Iter 9/10: ladvise speed: 0.406652
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381764
Iter 10/10: OSS cache speed: 0.424384
Iter 10/10: ladvise speed: 0.457776
Average uncached read: .48
Average speedup with OSS cached read:  .52 = +8%
Average speedup with ladvise willread:  .56 = +16%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0