== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:32:53 (1789133573)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7392 s, 7.1 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-ffff8f72d88d0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.332774
Iter 1/10: OSS cache speed: 0.412152
Iter 1/10: ladvise speed: 0.367503
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.286572
Iter 2/10: OSS cache speed: 0.393349
Iter 2/10: ladvise speed: 0.439381
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.385509
Iter 3/10: OSS cache speed: 0.433282
Iter 3/10: ladvise speed: 0.384712
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356738
Iter 4/10: OSS cache speed: 0.378654
Iter 4/10: ladvise speed: 0.459661
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.358955
Iter 5/10: OSS cache speed: 0.346641
Iter 5/10: ladvise speed: 0.410934
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.313211
Iter 6/10: OSS cache speed: 0.361085
Iter 6/10: ladvise speed: 0.374717
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.304838
Iter 7/10: OSS cache speed: 0.337734
Iter 7/10: ladvise speed: 0.408329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.368465
Iter 8/10: OSS cache speed: 0.377503
Iter 8/10: ladvise speed: 0.321527
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.332922
Iter 9/10: OSS cache speed: 0.308743
Iter 9/10: ladvise speed: 0.32102
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.328359
Iter 10/10: OSS cache speed: 0.316834
Iter 10/10: ladvise speed: 0.330187
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .38 = +15%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0