== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:57:57 (1785221877)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.81239 s, 15.4 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-ffff8ff71106f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.363732
Iter 1/10: OSS cache speed: 0.353671
Iter 1/10: ladvise speed: 0.520176
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.461812
Iter 2/10: OSS cache speed: 0.508303
Iter 2/10: ladvise speed: 0.498173
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.454918
Iter 3/10: OSS cache speed: 0.555696
Iter 3/10: ladvise speed: 0.55599
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.48415
Iter 4/10: OSS cache speed: 0.582908
Iter 4/10: ladvise speed: 0.659774
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.564494
Iter 5/10: OSS cache speed: 0.714039
Iter 5/10: ladvise speed: 0.748532
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.693435
Iter 6/10: OSS cache speed: 0.470078
Iter 6/10: ladvise speed: 0.376449
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.440385
Iter 7/10: OSS cache speed: 0.494786
Iter 7/10: ladvise speed: 0.460092
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.409638
Iter 8/10: OSS cache speed: 0.420361
Iter 8/10: ladvise speed: 0.403037
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.439623
Iter 9/10: OSS cache speed: 0.443228
Iter 9/10: ladvise speed: 0.432156
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.418587
Iter 10/10: OSS cache speed: 0.402074
Iter 10/10: ladvise speed: 0.473056
Average uncached read: .47
Average speedup with OSS cached read:  .49 = +4%
Average speedup with ladvise willread:  .51 = +8%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0