== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:13:05 (1789603985)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3416 s, 9.2 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-ffff9e5349054000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.438229
Iter 1/10: OSS cache speed: 0.414856
Iter 1/10: ladvise speed: 0.466745
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.46432
Iter 2/10: OSS cache speed: 0.514828
Iter 2/10: ladvise speed: 0.538911
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.404466
Iter 3/10: OSS cache speed: 0.494301
Iter 3/10: ladvise speed: 0.50832
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410289
Iter 4/10: OSS cache speed: 0.438828
Iter 4/10: ladvise speed: 0.426497
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.384212
Iter 5/10: OSS cache speed: 0.414944
Iter 5/10: ladvise speed: 0.516572
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.457501
Iter 6/10: OSS cache speed: 0.516173
Iter 6/10: ladvise speed: 0.461224
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400396
Iter 7/10: OSS cache speed: 0.433732
Iter 7/10: ladvise speed: 0.493914
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.45973
Iter 8/10: OSS cache speed: 0.492957
Iter 8/10: ladvise speed: 0.467577
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385398
Iter 9/10: OSS cache speed: 0.472269
Iter 9/10: ladvise speed: 0.447092
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.407869
Iter 10/10: OSS cache speed: 0.464375
Iter 10/10: ladvise speed: 0.485235
Average uncached read: .42
Average speedup with OSS cached read:  .46 = +9%
Average speedup with ladvise willread:  .48 = +14%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0