== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:46:12 (1787118372)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6968 s, 8.3 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-ffff8f9546399000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.31118
Iter 1/10: OSS cache speed: 0.363928
Iter 1/10: ladvise speed: 0.355098
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.320174
Iter 2/10: OSS cache speed: 0.369014
Iter 2/10: ladvise speed: 0.327936
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.313541
Iter 3/10: OSS cache speed: 0.349211
Iter 3/10: ladvise speed: 0.376452
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.266349
Iter 4/10: OSS cache speed: 0.357124
Iter 4/10: ladvise speed: 0.334425
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.324231
Iter 5/10: OSS cache speed: 0.337677
Iter 5/10: ladvise speed: 0.362614
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.32847
Iter 6/10: OSS cache speed: 0.331309
Iter 6/10: ladvise speed: 0.356731
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.350613
Iter 7/10: OSS cache speed: 0.400159
Iter 7/10: ladvise speed: 0.404342
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.340109
Iter 8/10: OSS cache speed: 0.394042
Iter 8/10: ladvise speed: 0.318697
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.309236
Iter 9/10: OSS cache speed: 0.405735
Iter 9/10: ladvise speed: 0.411175
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.356716
Iter 10/10: OSS cache speed: 0.37601
Iter 10/10: ladvise speed: 0.397476
Average uncached read: .32
Average speedup with OSS cached read:  .36 = +12%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0