== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:42:08 (1736786528)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.43517 s, 43.1 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-ffff8800b5890800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.36023
Iter 1/10: OSS cache speed: 2.10614
Iter 1/10: ladvise speed: 2.12526
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.80881
Iter 2/10: OSS cache speed: 1.84178
Iter 2/10: ladvise speed: 2.22767
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.56084
Iter 3/10: OSS cache speed: 2.41938
Iter 3/10: ladvise speed: 2.26587
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.59197
Iter 4/10: OSS cache speed: 2.82155
Iter 4/10: ladvise speed: 2.44167
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.05968
Iter 5/10: OSS cache speed: 1.64253
Iter 5/10: ladvise speed: 1.93171
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.11671
Iter 6/10: OSS cache speed: 2.01966
Iter 6/10: ladvise speed: 2.06126
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.38328
Iter 7/10: OSS cache speed: 2.24679
Iter 7/10: ladvise speed: 2.30386
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.17703
Iter 8/10: OSS cache speed: 1.81971
Iter 8/10: ladvise speed: 2.42602
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.42687
Iter 9/10: OSS cache speed: 2.59474
Iter 9/10: ladvise speed: 2.06274
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.39136
Iter 10/10: OSS cache speed: 1.79404
Iter 10/10: ladvise speed: 2.6249
Average uncached read: 2.28
Average speedup with OSS cached read:  2.13 = +-6%
Average speedup with ladvise willread:  2.24 = +-1%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0