== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:30:29 (1733643029)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.28877 s, 45.8 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-ffff8800b602d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.46163
Iter 1/10: OSS cache speed: 2.46902
Iter 1/10: ladvise speed: 2.40652
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.98568
Iter 2/10: OSS cache speed: 2.32158
Iter 2/10: ladvise speed: 1.8463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.84162
Iter 3/10: OSS cache speed: 2.31176
Iter 3/10: ladvise speed: 1.62787
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.94432
Iter 4/10: OSS cache speed: 2.5401
Iter 4/10: ladvise speed: 2.57275
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.50955
Iter 5/10: OSS cache speed: 2.42827
Iter 5/10: ladvise speed: 2.52655
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.67356
Iter 6/10: OSS cache speed: 2.7665
Iter 6/10: ladvise speed: 2.75233
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.49888
Iter 7/10: OSS cache speed: 2.51258
Iter 7/10: ladvise speed: 2.43343
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.62204
Iter 8/10: OSS cache speed: 2.64784
Iter 8/10: ladvise speed: 2.7497
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.70302
Iter 9/10: OSS cache speed: 2.9153
Iter 9/10: ladvise speed: 2.80149
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.74576
Iter 10/10: OSS cache speed: 2.07818
Iter 10/10: ladvise speed: 2.60767
Average uncached read: 2.39
Average speedup with OSS cached read:  2.49 = +4%
Average speedup with ladvise willread:  2.43 = +1%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0