== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:56:51 (1789268211)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8691 s, 7.6 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-ffff9daac4c3a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.360595
Iter 1/10: OSS cache speed: 0.380485
Iter 1/10: ladvise speed: 0.376628
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.331094
Iter 2/10: OSS cache speed: 0.438451
Iter 2/10: ladvise speed: 0.32113
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.370201
Iter 3/10: OSS cache speed: 0.433825
Iter 3/10: ladvise speed: 0.383637
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.388887
Iter 4/10: OSS cache speed: 0.449001
Iter 4/10: ladvise speed: 0.359329
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432228
Iter 5/10: OSS cache speed: 0.416023
Iter 5/10: ladvise speed: 0.370811
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356321
Iter 6/10: OSS cache speed: 0.377799
Iter 6/10: ladvise speed: 0.345036
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.340148
Iter 7/10: OSS cache speed: 0.409721
Iter 7/10: ladvise speed: 0.355767
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.329377
Iter 8/10: OSS cache speed: 0.342242
Iter 8/10: ladvise speed: 0.352936
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310207
Iter 9/10: OSS cache speed: 0.393098
Iter 9/10: ladvise speed: 0.381684
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367527
Iter 10/10: OSS cache speed: 0.373687
Iter 10/10: ladvise speed: 0.388489
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0