== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:31:41 (1781274701)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.653 s, 9.0 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-ffff993ae039e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.428205
Iter 1/10: OSS cache speed: 0.453847
Iter 1/10: ladvise speed: 0.444105
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.478316
Iter 2/10: OSS cache speed: 0.42313
Iter 2/10: ladvise speed: 0.411429
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.390166
Iter 3/10: OSS cache speed: 0.391536
Iter 3/10: ladvise speed: 0.393583
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410352
Iter 4/10: OSS cache speed: 0.409896
Iter 4/10: ladvise speed: 0.409574
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.418245
Iter 5/10: OSS cache speed: 0.476235
Iter 5/10: ladvise speed: 0.427952
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.454183
Iter 6/10: OSS cache speed: 0.407361
Iter 6/10: ladvise speed: 0.434148
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.416041
Iter 7/10: OSS cache speed: 0.423354
Iter 7/10: ladvise speed: 0.337858
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.386955
Iter 8/10: OSS cache speed: 0.438696
Iter 8/10: ladvise speed: 0.402838
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357194
Iter 9/10: OSS cache speed: 0.368164
Iter 9/10: ladvise speed: 0.385392
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.34183
Iter 10/10: OSS cache speed: 0.370037
Iter 10/10: ladvise speed: 0.439707
Average uncached read: .40
Average speedup with OSS cached read:  .41 = +2%
Average speedup with ladvise willread:  .40 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0