== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:37:43 (1788943063)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7931 s, 8.2 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-ffff9e3547d8f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.31048
Iter 1/10: OSS cache speed: 0.392596
Iter 1/10: ladvise speed: 0.385021
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.331865
Iter 2/10: OSS cache speed: 0.395702
Iter 2/10: ladvise speed: 0.359551
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.336005
Iter 3/10: OSS cache speed: 0.307085
Iter 3/10: ladvise speed: 0.315298
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.308913
Iter 4/10: OSS cache speed: 0.390151
Iter 4/10: ladvise speed: 0.387773
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.354953
Iter 5/10: OSS cache speed: 0.363339
Iter 5/10: ladvise speed: 0.430025
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.368862
Iter 6/10: OSS cache speed: 0.43527
Iter 6/10: ladvise speed: 0.447809
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.396739
Iter 7/10: OSS cache speed: 0.425723
Iter 7/10: ladvise speed: 0.39097
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.339027
Iter 8/10: OSS cache speed: 0.380725
Iter 8/10: ladvise speed: 0.413909
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357103
Iter 9/10: OSS cache speed: 0.360327
Iter 9/10: ladvise speed: 0.415286
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.35647
Iter 10/10: OSS cache speed: 0.394776
Iter 10/10: ladvise speed: 0.390458
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .39 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0