== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:07:32 (1782482852)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.59419 s, 13.8 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-ffff9b83cc9de800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.640822
Iter 1/10: OSS cache speed: 0.795998
Iter 1/10: ladvise speed: 0.91289
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.813696
Iter 2/10: OSS cache speed: 0.91704
Iter 2/10: ladvise speed: 0.811159
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.671153
Iter 3/10: OSS cache speed: 0.833639
Iter 3/10: ladvise speed: 0.942411
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.829086
Iter 4/10: OSS cache speed: 0.864358
Iter 4/10: ladvise speed: 0.928546
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.763496
Iter 5/10: OSS cache speed: 0.977811
Iter 5/10: ladvise speed: 1.31974
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.12889
Iter 6/10: OSS cache speed: 1.51431
Iter 6/10: ladvise speed: 1.62347
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.950799
Iter 7/10: OSS cache speed: 0.619456
Iter 7/10: ladvise speed: 0.684762
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.388023
Iter 8/10: OSS cache speed: 0.367345
Iter 8/10: ladvise speed: 0.480416
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.448653
Iter 9/10: OSS cache speed: 0.462191
Iter 9/10: ladvise speed: 0.522111
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.726825
Iter 10/10: OSS cache speed: 0.870305
Iter 10/10: ladvise speed: 0.382098
Average uncached read: .73
Average speedup with OSS cached read:  .82 = +12%
Average speedup with ladvise willread:  .86 = +17%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0