== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:41:32 (1790948492)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3425 s, 8.5 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-ffff97d387c92800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.341968
Iter 1/10: OSS cache speed: 0.337527
Iter 1/10: ladvise speed: 0.334106
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.388351
Iter 2/10: OSS cache speed: 0.389497
Iter 2/10: ladvise speed: 0.384539
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.417305
Iter 3/10: OSS cache speed: 0.375809
Iter 3/10: ladvise speed: 0.360358
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.41814
Iter 4/10: OSS cache speed: 0.42552
Iter 4/10: ladvise speed: 0.394423
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380101
Iter 5/10: OSS cache speed: 0.40011
Iter 5/10: ladvise speed: 0.405902
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.38892
Iter 6/10: OSS cache speed: 0.438727
Iter 6/10: ladvise speed: 0.426765
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376473
Iter 7/10: OSS cache speed: 0.43279
Iter 7/10: ladvise speed: 0.407329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.412033
Iter 8/10: OSS cache speed: 0.388145
Iter 8/10: ladvise speed: 0.368977
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392027
Iter 9/10: OSS cache speed: 0.358313
Iter 9/10: ladvise speed: 0.377167
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.449748
Iter 10/10: OSS cache speed: 0.411455
Iter 10/10: ladvise speed: 0.408092
Average uncached read: .39
Average speedup with OSS cached read:  .39 = +0%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0