== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:44:42 (1790099082)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.52578 s, 16.1 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-ffff8a2208461800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.714232
Iter 1/10: OSS cache speed: 0.479588
Iter 1/10: ladvise speed: 0.313562
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.425894
Iter 2/10: OSS cache speed: 0.486137
Iter 2/10: ladvise speed: 0.438943
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.486861
Iter 3/10: OSS cache speed: 0.467243
Iter 3/10: ladvise speed: 0.495678
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.595289
Iter 4/10: OSS cache speed: 0.595088
Iter 4/10: ladvise speed: 0.589202
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.642828
Iter 5/10: OSS cache speed: 0.709119
Iter 5/10: ladvise speed: 0.296762
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.533006
Iter 6/10: OSS cache speed: 0.513667
Iter 6/10: ladvise speed: 0.526217
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.47246
Iter 7/10: OSS cache speed: 0.28279
Iter 7/10: ladvise speed: 0.390842
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.377948
Iter 8/10: OSS cache speed: 0.341632
Iter 8/10: ladvise speed: 0.340948
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.336922
Iter 9/10: OSS cache speed: 0.359257
Iter 9/10: ladvise speed: 0.365486
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317111
Iter 10/10: OSS cache speed: 0.42032
Iter 10/10: ladvise speed: 0.410111
Average uncached read: .49
Average speedup with OSS cached read:  .46 = +-6%
Average speedup with ladvise willread:  .41 = +-16%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0