== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:23:14 (1786692194)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.9657 s, 9.6 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-ffff9384871af800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.343957
Iter 1/10: OSS cache speed: 0.438566
Iter 1/10: ladvise speed: 0.459139
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.370853
Iter 2/10: OSS cache speed: 0.474611
Iter 2/10: ladvise speed: 0.423262
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352085
Iter 3/10: OSS cache speed: 0.420054
Iter 3/10: ladvise speed: 0.416936
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368994
Iter 4/10: OSS cache speed: 0.372355
Iter 4/10: ladvise speed: 0.40409
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.333996
Iter 5/10: OSS cache speed: 0.387883
Iter 5/10: ladvise speed: 0.316089
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.322972
Iter 6/10: OSS cache speed: 0.388258
Iter 6/10: ladvise speed: 0.395915
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.302218
Iter 7/10: OSS cache speed: 0.377444
Iter 7/10: ladvise speed: 0.445858
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.39068
Iter 8/10: OSS cache speed: 0.436055
Iter 8/10: ladvise speed: 0.430094
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.355007
Iter 9/10: OSS cache speed: 0.36761
Iter 9/10: ladvise speed: 0.452308
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.343689
Iter 10/10: OSS cache speed: 0.39437
Iter 10/10: ladvise speed: 0.450846
Average uncached read: .34
Average speedup with OSS cached read:  .40 = +17%
Average speedup with ladvise willread:  .41 = +20%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0