== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:23:45 (1788866625)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5549 s, 9.1 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-ffff8c56116e6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.290544
Iter 1/10: OSS cache speed: 0.334041
Iter 1/10: ladvise speed: 0.328025
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.320936
Iter 2/10: OSS cache speed: 0.328275
Iter 2/10: ladvise speed: 0.32266
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.320936
Iter 3/10: OSS cache speed: 0.382305
Iter 3/10: ladvise speed: 0.330466
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.30573
Iter 4/10: OSS cache speed: 0.3914
Iter 4/10: ladvise speed: 0.424055
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387747
Iter 5/10: OSS cache speed: 0.382623
Iter 5/10: ladvise speed: 0.374583
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.335559
Iter 6/10: OSS cache speed: 0.390118
Iter 6/10: ladvise speed: 0.382968
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.384397
Iter 7/10: OSS cache speed: 0.412133
Iter 7/10: ladvise speed: 0.420124
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.374067
Iter 8/10: OSS cache speed: 0.388696
Iter 8/10: ladvise speed: 0.422617
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377817
Iter 9/10: OSS cache speed: 0.431005
Iter 9/10: ladvise speed: 0.376847
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.377288
Iter 10/10: OSS cache speed: 0.345909
Iter 10/10: ladvise speed: 0.406919
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .37 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0