== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:11:01 (1789132261)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3278 s, 8.5 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-ffff92c989b63800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.372869
Iter 1/10: OSS cache speed: 0.362879
Iter 1/10: ladvise speed: 0.349221
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.354915
Iter 2/10: OSS cache speed: 0.411348
Iter 2/10: ladvise speed: 0.386448
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.370491
Iter 3/10: OSS cache speed: 0.40955
Iter 3/10: ladvise speed: 0.375012
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.387349
Iter 4/10: OSS cache speed: 0.358464
Iter 4/10: ladvise speed: 0.374548
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366039
Iter 5/10: OSS cache speed: 0.404885
Iter 5/10: ladvise speed: 0.379369
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.351896
Iter 6/10: OSS cache speed: 0.321562
Iter 6/10: ladvise speed: 0.314773
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.320264
Iter 7/10: OSS cache speed: 0.311144
Iter 7/10: ladvise speed: 0.372292
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.287719
Iter 8/10: OSS cache speed: 0.357442
Iter 8/10: ladvise speed: 0.383056
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.422588
Iter 9/10: OSS cache speed: 0.368501
Iter 9/10: ladvise speed: 0.370865
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.333384
Iter 10/10: OSS cache speed: 0.361721
Iter 10/10: ladvise speed: 0.387626
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0