== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:06:06 (1789085166)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6278 s, 9.0 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-ffff98d498615800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346224
Iter 1/10: OSS cache speed: 0.390024
Iter 1/10: ladvise speed: 0.398816
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.324366
Iter 2/10: OSS cache speed: 0.36448
Iter 2/10: ladvise speed: 0.391034
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.389278
Iter 3/10: OSS cache speed: 0.327627
Iter 3/10: ladvise speed: 0.459352
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.339567
Iter 4/10: OSS cache speed: 0.419777
Iter 4/10: ladvise speed: 0.369491
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357893
Iter 5/10: OSS cache speed: 0.406455
Iter 5/10: ladvise speed: 0.354059
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.336004
Iter 6/10: OSS cache speed: 0.443427
Iter 6/10: ladvise speed: 0.435256
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.356067
Iter 7/10: OSS cache speed: 0.371187
Iter 7/10: ladvise speed: 0.378997
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341373
Iter 8/10: OSS cache speed: 0.369293
Iter 8/10: ladvise speed: 0.358436
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.339669
Iter 9/10: OSS cache speed: 0.321352
Iter 9/10: ladvise speed: 0.344752
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.315674
Iter 10/10: OSS cache speed: 0.341786
Iter 10/10: ladvise speed: 0.354102
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0