== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:39:49 (1788835189)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.772 s, 7.1 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-ffff89ccc355a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.342782
Iter 1/10: OSS cache speed: 0.388572
Iter 1/10: ladvise speed: 0.390188
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.349827
Iter 2/10: OSS cache speed: 0.316538
Iter 2/10: ladvise speed: 0.389557
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.305996
Iter 3/10: OSS cache speed: 0.382824
Iter 3/10: ladvise speed: 0.354069
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.306485
Iter 4/10: OSS cache speed: 0.348872
Iter 4/10: ladvise speed: 0.408932
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.362721
Iter 5/10: OSS cache speed: 0.394388
Iter 5/10: ladvise speed: 0.426386
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.319104
Iter 6/10: OSS cache speed: 0.448575
Iter 6/10: ladvise speed: 0.44306
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375254
Iter 7/10: OSS cache speed: 0.457032
Iter 7/10: ladvise speed: 0.467244
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.436618
Iter 8/10: OSS cache speed: 0.443829
Iter 8/10: ladvise speed: 0.424561
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.426901
Iter 9/10: OSS cache speed: 0.417191
Iter 9/10: ladvise speed: 0.410142
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.421843
Iter 10/10: OSS cache speed: 0.476457
Iter 10/10: ladvise speed: 0.388767
Average uncached read: .36
Average speedup with OSS cached read:  .40 = +11%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0