== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:50:39 (1787827839)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9586 s, 7.0 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-ffff913810850000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34858
Iter 1/10: OSS cache speed: 0.326653
Iter 1/10: ladvise speed: 0.351145
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.338302
Iter 2/10: OSS cache speed: 0.461945
Iter 2/10: ladvise speed: 0.480767
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.401489
Iter 3/10: OSS cache speed: 0.44819
Iter 3/10: ladvise speed: 0.420428
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.425652
Iter 4/10: OSS cache speed: 0.465946
Iter 4/10: ladvise speed: 0.467285
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.392416
Iter 5/10: OSS cache speed: 0.455775
Iter 5/10: ladvise speed: 0.47132
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.411372
Iter 6/10: OSS cache speed: 0.386391
Iter 6/10: ladvise speed: 0.588009
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.541974
Iter 7/10: OSS cache speed: 0.441023
Iter 7/10: ladvise speed: 0.424378
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.42531
Iter 8/10: OSS cache speed: 0.449996
Iter 8/10: ladvise speed: 0.499937
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.55216
Iter 9/10: OSS cache speed: 0.4807
Iter 9/10: ladvise speed: 0.498109
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.474225
Iter 10/10: OSS cache speed: 0.525633
Iter 10/10: ladvise speed: 0.565282
Average uncached read: .43
Average speedup with OSS cached read:  .44 = +2%
Average speedup with ladvise willread:  .47 = +9%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0