== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:38:41 (1767317921)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2829 s, 7.3 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-ffff899d8cbae000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.35023
Iter 1/10: OSS cache speed: 0.365783
Iter 1/10: ladvise speed: 0.352608
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319428
Iter 2/10: OSS cache speed: 0.364425
Iter 2/10: ladvise speed: 0.344217
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.336689
Iter 3/10: OSS cache speed: 0.360338
Iter 3/10: ladvise speed: 0.327943
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.33314
Iter 4/10: OSS cache speed: 0.335718
Iter 4/10: ladvise speed: 0.338112
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.329894
Iter 5/10: OSS cache speed: 0.338615
Iter 5/10: ladvise speed: 0.360209
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.319949
Iter 6/10: OSS cache speed: 0.360792
Iter 6/10: ladvise speed: 0.349488
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.367106
Iter 7/10: OSS cache speed: 0.351737
Iter 7/10: ladvise speed: 0.324662
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.316208
Iter 8/10: OSS cache speed: 0.326434
Iter 8/10: ladvise speed: 0.354593
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.34341
Iter 9/10: OSS cache speed: 0.323196
Iter 9/10: ladvise speed: 0.357638
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337294
Iter 10/10: OSS cache speed: 0.326781
Iter 10/10: ladvise speed: 0.337512
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0