== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:07:09 (1788836829)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.035 s, 7.0 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-ffff9e91522b8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.480611
Iter 1/10: OSS cache speed: 0.424362
Iter 1/10: ladvise speed: 0.415282
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.361094
Iter 2/10: OSS cache speed: 0.392361
Iter 2/10: ladvise speed: 0.363412
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379998
Iter 3/10: OSS cache speed: 0.396776
Iter 3/10: ladvise speed: 0.416212
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.441541
Iter 4/10: OSS cache speed: 0.433807
Iter 4/10: ladvise speed: 0.523852
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.40037
Iter 5/10: OSS cache speed: 0.52627
Iter 5/10: ladvise speed: 0.442524
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.437105
Iter 6/10: OSS cache speed: 0.49023
Iter 6/10: ladvise speed: 0.444636
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435215
Iter 7/10: OSS cache speed: 0.474369
Iter 7/10: ladvise speed: 0.46336
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.436413
Iter 8/10: OSS cache speed: 0.425725
Iter 8/10: ladvise speed: 0.45621
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.408893
Iter 9/10: OSS cache speed: 0.468549
Iter 9/10: ladvise speed: 0.491478
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.415254
Iter 10/10: OSS cache speed: 0.419686
Iter 10/10: ladvise speed: 0.451003
Average uncached read: .41
Average speedup with OSS cached read:  .44 = +7%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0