== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:14:42 (1786832082)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2409 s, 8.6 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-ffff8fee601ad800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.492445
Iter 1/10: OSS cache speed: 0.389238
Iter 1/10: ladvise speed: 0.470253
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.441277
Iter 2/10: OSS cache speed: 0.417805
Iter 2/10: ladvise speed: 0.454875
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.416461
Iter 3/10: OSS cache speed: 0.386421
Iter 3/10: ladvise speed: 0.461891
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.340673
Iter 4/10: OSS cache speed: 0.400818
Iter 4/10: ladvise speed: 0.403228
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.435396
Iter 5/10: OSS cache speed: 0.393681
Iter 5/10: ladvise speed: 0.462269
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.376724
Iter 6/10: OSS cache speed: 0.430376
Iter 6/10: ladvise speed: 0.530709
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.458686
Iter 7/10: OSS cache speed: 0.465288
Iter 7/10: ladvise speed: 0.429887
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.373373
Iter 8/10: OSS cache speed: 0.447019
Iter 8/10: ladvise speed: 0.438203
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.464092
Iter 9/10: OSS cache speed: 0.48526
Iter 9/10: ladvise speed: 0.41867
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.461508
Iter 10/10: OSS cache speed: 0.462587
Iter 10/10: ladvise speed: 0.54223
Average uncached read: .42
Average speedup with OSS cached read:  .42 = +0%
Average speedup with ladvise willread:  .46 = +9%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0