== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:32:20 (1747211540)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.48706 s, 30.1 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-ffff8800b63eb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.14294
Iter 1/10: OSS cache speed: 1.41527
Iter 1/10: ladvise speed: 1.78783
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.37247
Iter 2/10: OSS cache speed: 1.76112
Iter 2/10: ladvise speed: 2.22165
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.44571
Iter 3/10: OSS cache speed: 1.23203
Iter 3/10: ladvise speed: 0.669587
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.743782
Iter 4/10: OSS cache speed: 0.674693
Iter 4/10: ladvise speed: 0.610485
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.595591
Iter 5/10: OSS cache speed: 0.646718
Iter 5/10: ladvise speed: 0.690607
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.682018
Iter 6/10: OSS cache speed: 0.694544
Iter 6/10: ladvise speed: 0.745273
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.725199
Iter 7/10: OSS cache speed: 0.700942
Iter 7/10: ladvise speed: 0.747885
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.916752
Iter 8/10: OSS cache speed: 1.03661
Iter 8/10: ladvise speed: 1.0326
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.13986
Iter 9/10: OSS cache speed: 1.34324
Iter 9/10: ladvise speed: 1.22649
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.355
Iter 10/10: OSS cache speed: 1.31174
Iter 10/10: ladvise speed: 1.75478
Average uncached read: 1.11
Average speedup with OSS cached read:  1.08 = +-2%
Average speedup with ladvise willread:  1.14 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0