== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:09:39 (1787832579)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2155 s, 7.9 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-ffff921358480800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.395323
Iter 1/10: OSS cache speed: 0.317846
Iter 1/10: ladvise speed: 0.437422
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.382433
Iter 2/10: OSS cache speed: 0.485944
Iter 2/10: ladvise speed: 0.307288
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.341766
Iter 3/10: OSS cache speed: 0.316197
Iter 3/10: ladvise speed: 0.41842
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.43638
Iter 4/10: OSS cache speed: 0.393498
Iter 4/10: ladvise speed: 0.449824
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.420664
Iter 5/10: OSS cache speed: 0.433175
Iter 5/10: ladvise speed: 0.503402
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355011
Iter 6/10: OSS cache speed: 0.424955
Iter 6/10: ladvise speed: 0.51456
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.440885
Iter 7/10: OSS cache speed: 0.456288
Iter 7/10: ladvise speed: 0.502807
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.469724
Iter 8/10: OSS cache speed: 0.480179
Iter 8/10: ladvise speed: 0.450865
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.403817
Iter 9/10: OSS cache speed: 0.454996
Iter 9/10: ladvise speed: 0.501363
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.440834
Iter 10/10: OSS cache speed: 0.463715
Iter 10/10: ladvise speed: 0.423553
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .45 = +12%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0