== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:10:47 (1787793047)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.2685 s, 6.1 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-ffff9833d0cdd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34621
Iter 1/10: OSS cache speed: 0.40459
Iter 1/10: ladvise speed: 0.392559
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.378762
Iter 2/10: OSS cache speed: 0.379362
Iter 2/10: ladvise speed: 0.327148
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301487
Iter 3/10: OSS cache speed: 0.327499
Iter 3/10: ladvise speed: 0.386854
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.294775
Iter 4/10: OSS cache speed: 0.364212
Iter 4/10: ladvise speed: 0.386882
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.313422
Iter 5/10: OSS cache speed: 0.360387
Iter 5/10: ladvise speed: 0.388594
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.318362
Iter 6/10: OSS cache speed: 0.36252
Iter 6/10: ladvise speed: 0.416279
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.342465
Iter 7/10: OSS cache speed: 0.344178
Iter 7/10: ladvise speed: 0.387401
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.353996
Iter 8/10: OSS cache speed: 0.356281
Iter 8/10: ladvise speed: 0.408655
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.339011
Iter 9/10: OSS cache speed: 0.415226
Iter 9/10: ladvise speed: 0.368228
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349847
Iter 10/10: OSS cache speed: 0.391207
Iter 10/10: ladvise speed: 0.384827
Average uncached read: .33
Average speedup with OSS cached read:  .37 = +12%
Average speedup with ladvise willread:  .38 = +15%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0