== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:30:25 (1715574625)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.41686 s, 43.4 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: 1.37799
Iter 1/10: OSS cache speed: 1.60948
Iter 1/10: ladvise speed: 1.65633
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.47142
Iter 2/10: OSS cache speed: 1.59485
Iter 2/10: ladvise speed: 1.5884
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.35919
Iter 3/10: OSS cache speed: 1.63928
Iter 3/10: ladvise speed: 1.59991
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.3678
Iter 4/10: OSS cache speed: 1.55828
Iter 4/10: ladvise speed: 1.66886
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.35302
Iter 5/10: OSS cache speed: 1.57806
Iter 5/10: ladvise speed: 1.6038
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.01048
Iter 6/10: OSS cache speed: 1.78759
Iter 6/10: ladvise speed: 1.60099
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.36585
Iter 7/10: OSS cache speed: 1.57797
Iter 7/10: ladvise speed: 1.6765
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.79912
Iter 8/10: OSS cache speed: 1.80178
Iter 8/10: ladvise speed: 2.09681
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.69272
Iter 9/10: OSS cache speed: 3.08341
Iter 9/10: ladvise speed: 1.87807
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.63788
Iter 10/10: OSS cache speed: 1.65791
Iter 10/10: ladvise speed: 1.88367
Average uncached read: 1.64
Average speedup with OSS cached read: 1.78 = +8.53%
Average speedup with ladvise willread: 1.72 = +4.87%
Speedup with OSS cached read less than 20%, got 8.53%. Skipping ladvise willread check.
fail_loc=0