== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:41:00 (1761122460)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.38053 s, 76.0 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=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.74566
Iter 1/10: OSS cache speed: 1.61635
Iter 1/10: ladvise speed: 1.68622
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.11997
Iter 2/10: OSS cache speed: 1.26922
Iter 2/10: ladvise speed: 2.24685
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.85536
Iter 3/10: OSS cache speed: 1.99082
Iter 3/10: ladvise speed: 2.08651
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.16912
Iter 4/10: OSS cache speed: 1.27566
Iter 4/10: ladvise speed: 1.56336
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.14557
Iter 5/10: OSS cache speed: 1.44263
Iter 5/10: ladvise speed: 1.7596
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.22998
Iter 6/10: OSS cache speed: 1.49858
Iter 6/10: ladvise speed: 1.56831
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.23355
Iter 7/10: OSS cache speed: 1.78028
Iter 7/10: ladvise speed: 1.85923
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.78362
Iter 8/10: OSS cache speed: 0.797903
Iter 8/10: ladvise speed: 0.968251
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.875697
Iter 9/10: OSS cache speed: 1.11879
Iter 9/10: ladvise speed: 1.06842
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.927721
Iter 10/10: OSS cache speed: 1.16261
Iter 10/10: ladvise speed: 1.36252
Average uncached read: 1.30
Average speedup with OSS cached read:  1.39 = +6.92%
Average speedup with ladvise willread:  1.61 = +23.84%
Speedup with OSS cached read less than 20%,  got 1.39%. Skipping ladvise willread check.