== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:36:37 (1740674197)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.61648 s, 40.1 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
llite.lustre-ffff88012a54f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.45874
Iter 1/10: OSS cache speed: 3.25139
Iter 1/10: ladvise speed: 2.60023
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.96836
Iter 2/10: OSS cache speed: 3.05725
Iter 2/10: ladvise speed: 2.50301
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.40184
Iter 3/10: OSS cache speed: 2.83312
Iter 3/10: ladvise speed: 2.95989
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.64422
Iter 4/10: OSS cache speed: 3.10707
Iter 4/10: ladvise speed: 2.07877
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.73959
Iter 5/10: OSS cache speed: 2.44398
Iter 5/10: ladvise speed: 2.0946
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.91179
Iter 6/10: OSS cache speed: 2.23294
Iter 6/10: ladvise speed: 2.54087
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.4115
Iter 7/10: OSS cache speed: 2.56478
Iter 7/10: ladvise speed: 2.79682
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.42327
Iter 8/10: OSS cache speed: 2.88036
Iter 8/10: ladvise speed: 2.5419
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.67956
Iter 9/10: OSS cache speed: 3.24682
Iter 9/10: ladvise speed: 3.36907
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.65854
Iter 10/10: OSS cache speed: 3.31004
Iter 10/10: ladvise speed: 2.97303
Average uncached read: 2.42
Average speedup with OSS cached read:  2.89 = +19%
Average speedup with ladvise willread:  2.64 = +9%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0