== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:44:11 (1734432251)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.1805 s, 33.0 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-ffff88012e94d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.93161
Iter 1/10: OSS cache speed: 1.76142
Iter 1/10: ladvise speed: 1.8855
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.28791
Iter 2/10: OSS cache speed: 1.40256
Iter 2/10: ladvise speed: 1.60495
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.34335
Iter 3/10: OSS cache speed: 2.07406
Iter 3/10: ladvise speed: 2.06176
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.40074
Iter 4/10: OSS cache speed: 2.69635
Iter 4/10: ladvise speed: 2.74437
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.74944
Iter 5/10: OSS cache speed: 3.31161
Iter 5/10: ladvise speed: 3.4193
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.69297
Iter 6/10: OSS cache speed: 3.37864
Iter 6/10: ladvise speed: 3.29313
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.75029
Iter 7/10: OSS cache speed: 3.02632
Iter 7/10: ladvise speed: 3.03212
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.80089
Iter 8/10: OSS cache speed: 3.34981
Iter 8/10: ladvise speed: 2.94032
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.84699
Iter 9/10: OSS cache speed: 3.24183
Iter 9/10: ladvise speed: 3.12276
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.97969
Iter 10/10: OSS cache speed: 3.30746
Iter 10/10: ladvise speed: 3.36891
Average uncached read: 2.37
Average speedup with OSS cached read:  2.75 = +16%
Average speedup with ladvise willread:  2.74 = +15%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0