== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:41:23 (1761122483)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.922052 s, 114 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: 1.52431
Iter 1/10: OSS cache speed: 1.21068
Iter 1/10: ladvise speed: 1.34745
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.890056
Iter 2/10: OSS cache speed: 1.18496
Iter 2/10: ladvise speed: 2.02372
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.65982
Iter 3/10: OSS cache speed: 1.66581
Iter 3/10: ladvise speed: 1.28189
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.97994
Iter 4/10: OSS cache speed: 1.20301
Iter 4/10: ladvise speed: 1.22136
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.16294
Iter 5/10: OSS cache speed: 1.32216
Iter 5/10: ladvise speed: 1.31521
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.19001
Iter 6/10: OSS cache speed: 1.17488
Iter 6/10: ladvise speed: 1.31404
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.41823
Iter 7/10: OSS cache speed: 1.47162
Iter 7/10: ladvise speed: 1.81868
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.484986
Iter 8/10: OSS cache speed: 0.812173
Iter 8/10: ladvise speed: 0.852799
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.865083
Iter 9/10: OSS cache speed: 0.803559
Iter 9/10: ladvise speed: 0.833872
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.929925
Iter 10/10: OSS cache speed: 1.03321
Iter 10/10: ladvise speed: 0.96699
Average uncached read: 1.11
Average speedup with OSS cached read:  1.18 = +6.30%
Average speedup with ladvise willread:  1.29 = +16.21%
Speedup with OSS cached read less than 20%,  got 1.18%. Skipping ladvise willread check.