== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:23:02 (1746112982)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.43047 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-ffff8800b631e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.89198
Iter 1/10: OSS cache speed: 2.57721
Iter 1/10: ladvise speed: 2.55108
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.9499
Iter 2/10: OSS cache speed: 2.19661
Iter 2/10: ladvise speed: 2.70288
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.00456
Iter 3/10: OSS cache speed: 2.48171
Iter 3/10: ladvise speed: 2.68626
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.90049
Iter 4/10: OSS cache speed: 2.24438
Iter 4/10: ladvise speed: 2.29656
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.64503
Iter 5/10: OSS cache speed: 1.87591
Iter 5/10: ladvise speed: 1.7847
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.58673
Iter 6/10: OSS cache speed: 1.59392
Iter 6/10: ladvise speed: 1.67519
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.40818
Iter 7/10: OSS cache speed: 1.61687
Iter 7/10: ladvise speed: 1.76705
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.46201
Iter 8/10: OSS cache speed: 1.71472
Iter 8/10: ladvise speed: 1.70512
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.52617
Iter 9/10: OSS cache speed: 1.75111
Iter 9/10: ladvise speed: 1.78005
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.64297
Iter 10/10: OSS cache speed: 1.89303
Iter 10/10: ladvise speed: 1.70813
Average uncached read: 1.80
Average speedup with OSS cached read:  1.99 = +10%
Average speedup with ladvise willread:  2.06 = +14%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0