== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:59:34 (1789430374)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1525 s, 8.6 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-ffff96acd0cad800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.413504
Iter 1/10: OSS cache speed: 0.500742
Iter 1/10: ladvise speed: 0.461209
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.438245
Iter 2/10: OSS cache speed: 0.387904
Iter 2/10: ladvise speed: 0.357853
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.402698
Iter 3/10: OSS cache speed: 0.466518
Iter 3/10: ladvise speed: 0.444681
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.383348
Iter 4/10: OSS cache speed: 0.426187
Iter 4/10: ladvise speed: 0.497596
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.376357
Iter 5/10: OSS cache speed: 0.461949
Iter 5/10: ladvise speed: 0.53828
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.452997
Iter 6/10: OSS cache speed: 0.493952
Iter 6/10: ladvise speed: 0.480902
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435442
Iter 7/10: OSS cache speed: 0.529863
Iter 7/10: ladvise speed: 0.529699
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.505401
Iter 8/10: OSS cache speed: 0.546711
Iter 8/10: ladvise speed: 0.416119
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.424718
Iter 9/10: OSS cache speed: 0.505194
Iter 9/10: ladvise speed: 0.452614
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.46399
Iter 10/10: OSS cache speed: 0.422553
Iter 10/10: ladvise speed: 0.46268
Average uncached read: .42
Average speedup with OSS cached read:  .47 = +11%
Average speedup with ladvise willread:  .46 = +9%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0