== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:38:08 (1763347088)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.94042 s, 10.5 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-ffff97bc453c8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.421178
Iter 1/10: OSS cache speed: 0.431527
Iter 1/10: ladvise speed: 0.482496
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427252
Iter 2/10: OSS cache speed: 0.527832
Iter 2/10: ladvise speed: 0.517525
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.425462
Iter 3/10: OSS cache speed: 0.407158
Iter 3/10: ladvise speed: 0.440786
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.379569
Iter 4/10: OSS cache speed: 0.465075
Iter 4/10: ladvise speed: 0.452516
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.394451
Iter 5/10: OSS cache speed: 0.411233
Iter 5/10: ladvise speed: 0.511094
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.46729
Iter 6/10: OSS cache speed: 0.513085
Iter 6/10: ladvise speed: 0.493352
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.444104
Iter 7/10: OSS cache speed: 0.462867
Iter 7/10: ladvise speed: 0.490465
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.367382
Iter 8/10: OSS cache speed: 0.495537
Iter 8/10: ladvise speed: 0.431773
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.390218
Iter 9/10: OSS cache speed: 0.46013
Iter 9/10: ladvise speed: 0.418987
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.432365
Iter 10/10: OSS cache speed: 0.46146
Iter 10/10: ladvise speed: 0.356702
Average uncached read: .41
Average speedup with OSS cached read:  .46 = +12%
Average speedup with ladvise willread:  .45 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0