== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:17:48 (1708827468)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.18243 s, 48.0 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
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 3.24451
Iter 1/10: OSS cache speed: 3.56109
Iter 1/10: ladvise speed: 2.70717
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.09182
Iter 2/10: OSS cache speed: 2.81474
Iter 2/10: ladvise speed: 2.99415
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.20265
Iter 3/10: OSS cache speed: 2.90016
Iter 3/10: ladvise speed: 3.10547
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.79537
Iter 4/10: OSS cache speed: 3.10381
Iter 4/10: ladvise speed: 2.9725
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.99545
Iter 5/10: OSS cache speed: 3.14101
Iter 5/10: ladvise speed: 3.43882
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.89363
Iter 6/10: OSS cache speed: 3.38857
Iter 6/10: ladvise speed: 3.18059
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.10014
Iter 7/10: OSS cache speed: 3.13991
Iter 7/10: ladvise speed: 3.23014
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.89244
Iter 8/10: OSS cache speed: 3.10113
Iter 8/10: ladvise speed: 3.18066
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.84018
Iter 9/10: OSS cache speed: 2.96938
Iter 9/10: ladvise speed: 3.10824
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.84448
Iter 10/10: OSS cache speed: 3.61547
Iter 10/10: ladvise speed: 3.29806
Average uncached read: 2.99
Average speedup with OSS cached read: 3.17 = +6.02%
Average speedup with ladvise willread: 3.12 = +4.34%
Speedup with OSS cached read less than 20%, got 6.02%. Skipping ladvise willread check.
fail_loc=0