== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:36:42 (1781231802)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4804 s, 8.4 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-ffff9cd906745800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.367632
Iter 1/10: OSS cache speed: 0.361384
Iter 1/10: ladvise speed: 0.391412
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.388608
Iter 2/10: OSS cache speed: 0.408888
Iter 2/10: ladvise speed: 0.396473
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.435345
Iter 3/10: OSS cache speed: 0.455224
Iter 3/10: ladvise speed: 0.296235
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.485822
Iter 4/10: OSS cache speed: 0.489145
Iter 4/10: ladvise speed: 0.452255
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.423307
Iter 5/10: OSS cache speed: 0.46032
Iter 5/10: ladvise speed: 0.461566
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.412297
Iter 6/10: OSS cache speed: 0.489577
Iter 6/10: ladvise speed: 0.484151
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.429697
Iter 7/10: OSS cache speed: 0.419753
Iter 7/10: ladvise speed: 0.407678
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.48557
Iter 8/10: OSS cache speed: 0.413644
Iter 8/10: ladvise speed: 0.451576
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.429468
Iter 9/10: OSS cache speed: 0.452455
Iter 9/10: ladvise speed: 0.468593
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.401603
Iter 10/10: OSS cache speed: 0.423132
Iter 10/10: ladvise speed: 0.389938
Average uncached read: .42
Average speedup with OSS cached read:  .43 = +2%
Average speedup with ladvise willread:  .41 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0