== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:27:05 (1749122825)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.52548 s, 41.5 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-ffff8800b624b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.8336
Iter 1/10: OSS cache speed: 3.1053
Iter 1/10: ladvise speed: 2.86075
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.86942
Iter 2/10: OSS cache speed: 3.05936
Iter 2/10: ladvise speed: 3.14497
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.67094
Iter 3/10: OSS cache speed: 3.11071
Iter 3/10: ladvise speed: 3.19765
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.65968
Iter 4/10: OSS cache speed: 3.07122
Iter 4/10: ladvise speed: 2.97753
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.72056
Iter 5/10: OSS cache speed: 3.05488
Iter 5/10: ladvise speed: 2.9764
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.65776
Iter 6/10: OSS cache speed: 2.80433
Iter 6/10: ladvise speed: 2.62075
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.29537
Iter 7/10: OSS cache speed: 2.51797
Iter 7/10: ladvise speed: 2.59661
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.75098
Iter 8/10: OSS cache speed: 2.89112
Iter 8/10: ladvise speed: 2.67894
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.74545
Iter 9/10: OSS cache speed: 2.81232
Iter 9/10: ladvise speed: 2.7872
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.4706
Iter 10/10: OSS cache speed: 2.50907
Iter 10/10: ladvise speed: 2.88675
Average uncached read: 2.66
Average speedup with OSS cached read:  2.89 = +8%
Average speedup with ladvise willread:  2.87 = +7%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0