== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:44:20 (1787870660)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1732 s, 8.0 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-ffff8ce6449dc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.462431
Iter 1/10: OSS cache speed: 0.537534
Iter 1/10: ladvise speed: 0.528039
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.476174
Iter 2/10: OSS cache speed: 0.525429
Iter 2/10: ladvise speed: 0.545182
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.403522
Iter 3/10: OSS cache speed: 0.499665
Iter 3/10: ladvise speed: 0.51075
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.395431
Iter 4/10: OSS cache speed: 0.410026
Iter 4/10: ladvise speed: 0.499866
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.479875
Iter 5/10: OSS cache speed: 0.501672
Iter 5/10: ladvise speed: 0.44464
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.358877
Iter 6/10: OSS cache speed: 0.361026
Iter 6/10: ladvise speed: 0.454347
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.371534
Iter 7/10: OSS cache speed: 0.412462
Iter 7/10: ladvise speed: 0.450533
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.476743
Iter 8/10: OSS cache speed: 0.499376
Iter 8/10: ladvise speed: 0.478486
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.397411
Iter 9/10: OSS cache speed: 0.392298
Iter 9/10: ladvise speed: 0.468219
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.499378
Iter 10/10: OSS cache speed: 0.450627
Iter 10/10: ladvise speed: 0.448362
Average uncached read: .43
Average speedup with OSS cached read:  .45 = +4%
Average speedup with ladvise willread:  .48 = +11%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0