== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:04:49 (1786827889)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7763 s, 7.6 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-ffff9e984635e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361505
Iter 1/10: OSS cache speed: 0.382542
Iter 1/10: ladvise speed: 0.410361
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.440984
Iter 2/10: OSS cache speed: 0.447857
Iter 2/10: ladvise speed: 0.444528
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.376135
Iter 3/10: OSS cache speed: 0.430232
Iter 3/10: ladvise speed: 0.418536
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.402009
Iter 4/10: OSS cache speed: 0.415007
Iter 4/10: ladvise speed: 0.379926
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.37382
Iter 5/10: OSS cache speed: 0.410434
Iter 5/10: ladvise speed: 0.417956
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.391996
Iter 6/10: OSS cache speed: 0.43335
Iter 6/10: ladvise speed: 0.476526
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.456375
Iter 7/10: OSS cache speed: 0.433392
Iter 7/10: ladvise speed: 0.492936
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.444485
Iter 8/10: OSS cache speed: 0.510728
Iter 8/10: ladvise speed: 0.416428
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.430381
Iter 9/10: OSS cache speed: 0.414076
Iter 9/10: ladvise speed: 0.567038
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.458993
Iter 10/10: OSS cache speed: 0.383298
Iter 10/10: ladvise speed: 0.486277
Average uncached read: .41
Average speedup with OSS cached read:  .42 = +2%
Average speedup with ladvise willread:  .45 = +9%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0