== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:11:06 (1780999866)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.1176 s, 5.8 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-ffff8f7986b22800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.387378
Iter 1/10: OSS cache speed: 0.40524
Iter 1/10: ladvise speed: 0.431858
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.458492
Iter 2/10: OSS cache speed: 0.41354
Iter 2/10: ladvise speed: 0.435842
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438017
Iter 3/10: OSS cache speed: 0.358237
Iter 3/10: ladvise speed: 0.391595
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.468808
Iter 4/10: OSS cache speed: 0.452213
Iter 4/10: ladvise speed: 0.364029
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.327078
Iter 5/10: OSS cache speed: 0.391079
Iter 5/10: ladvise speed: 0.381378
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.385456
Iter 6/10: OSS cache speed: 0.391456
Iter 6/10: ladvise speed: 0.359674
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.437468
Iter 7/10: OSS cache speed: 0.416892
Iter 7/10: ladvise speed: 0.316579
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.319004
Iter 8/10: OSS cache speed: 0.378626
Iter 8/10: ladvise speed: 0.367892
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.316494
Iter 9/10: OSS cache speed: 0.357059
Iter 9/10: ladvise speed: 0.372703
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.319369
Iter 10/10: OSS cache speed: 0.347586
Iter 10/10: ladvise speed: 0.392184
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0