== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:51:19 (1780451479)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5748 s, 9.1 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-ffff938c8dce4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379245
Iter 1/10: OSS cache speed: 0.378942
Iter 1/10: ladvise speed: 0.326552
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.309179
Iter 2/10: OSS cache speed: 0.449613
Iter 2/10: ladvise speed: 0.397406
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.343921
Iter 3/10: OSS cache speed: 0.382505
Iter 3/10: ladvise speed: 0.32753
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.370541
Iter 4/10: OSS cache speed: 0.439871
Iter 4/10: ladvise speed: 0.469851
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.36045
Iter 5/10: OSS cache speed: 0.414044
Iter 5/10: ladvise speed: 0.372522
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.353284
Iter 6/10: OSS cache speed: 0.421406
Iter 6/10: ladvise speed: 0.406986
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.386305
Iter 7/10: OSS cache speed: 0.473331
Iter 7/10: ladvise speed: 0.459334
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.441989
Iter 8/10: OSS cache speed: 0.436872
Iter 8/10: ladvise speed: 0.351069
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.390659
Iter 9/10: OSS cache speed: 0.481797
Iter 9/10: ladvise speed: 0.468578
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.461327
Iter 10/10: OSS cache speed: 0.470242
Iter 10/10: ladvise speed: 0.515715
Average uncached read: .37
Average speedup with OSS cached read:  .43 = +16%
Average speedup with ladvise willread:  .40 = +8%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0