== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:39:17 (1736991557)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.549862 s, 191 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: 4.42664
Iter 1/10: OSS cache speed: 3.70572
Iter 1/10: ladvise speed: 3.21161
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 4.84142
Iter 2/10: OSS cache speed: 2.97231
Iter 2/10: ladvise speed: 3.31152
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.89755
Iter 3/10: OSS cache speed: 3.37283
Iter 3/10: ladvise speed: 3.35956
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.1879
Iter 4/10: OSS cache speed: 3.31357
Iter 4/10: ladvise speed: 3.19409
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.78511
Iter 5/10: OSS cache speed: 3.42037
Iter 5/10: ladvise speed: 3.4801
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.7153
Iter 6/10: OSS cache speed: 2.65888
Iter 6/10: ladvise speed: 2.77157
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.77313
Iter 7/10: OSS cache speed: 2.89414
Iter 7/10: ladvise speed: 2.70138
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.81637
Iter 8/10: OSS cache speed: 3.53401
Iter 8/10: ladvise speed: 3.2796
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.95096
Iter 9/10: OSS cache speed: 2.85166
Iter 9/10: ladvise speed: 2.60329
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.63694
Iter 10/10: OSS cache speed: 2.59072
Iter 10/10: ladvise speed: 2.68044
Average uncached read: 3.30
Average speedup with OSS cached read:  3.13 = +-5.15%
Average speedup with ladvise willread:  3.05 = +-7.57%
Speedup with OSS cached read less than 20%,  got 3.13%. Skipping ladvise willread check.