== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:17:45 (1708827465)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.29982 s, 45.6 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: 3.49209
Iter 1/10: OSS cache speed: 3.62528
Iter 1/10: ladvise speed: 2.81727
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88185
Iter 2/10: OSS cache speed: 3.03833
Iter 2/10: ladvise speed: 3.17559
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.10053
Iter 3/10: OSS cache speed: 3.06243
Iter 3/10: ladvise speed: 3.32519
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.07601
Iter 4/10: OSS cache speed: 3.39139
Iter 4/10: ladvise speed: 3.05509
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.00073
Iter 5/10: OSS cache speed: 3.18711
Iter 5/10: ladvise speed: 3.36148
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.72349
Iter 6/10: OSS cache speed: 3.2453
Iter 6/10: ladvise speed: 3.06817
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.88923
Iter 7/10: OSS cache speed: 3.0107
Iter 7/10: ladvise speed: 3.16854
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.97614
Iter 8/10: OSS cache speed: 3.19256
Iter 8/10: ladvise speed: 3.05048
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.72853
Iter 9/10: OSS cache speed: 3.06545
Iter 9/10: ladvise speed: 3.19933
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.03621
Iter 10/10: OSS cache speed: 3.73027
Iter 10/10: ladvise speed: 3.4906
Average uncached read: 2.89
Average speedup with OSS cached read: 3.25 = +12.45%
Average speedup with ladvise willread: 3.17 = +9.68%
Speedup with OSS cached read less than 20%, got 12.45%. Skipping ladvise willread check.
fail_loc=0