== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:39:37 (1786649977)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7012 s, 7.1 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-ffff990b4a83f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374051
Iter 1/10: OSS cache speed: 0.392615
Iter 1/10: ladvise speed: 0.427872
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352735
Iter 2/10: OSS cache speed: 0.422826
Iter 2/10: ladvise speed: 0.445731
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397142
Iter 3/10: OSS cache speed: 0.377712
Iter 3/10: ladvise speed: 0.353674
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.38807
Iter 4/10: OSS cache speed: 0.373595
Iter 4/10: ladvise speed: 0.400132
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.363459
Iter 5/10: OSS cache speed: 0.412943
Iter 5/10: ladvise speed: 0.347231
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.34843
Iter 6/10: OSS cache speed: 0.351962
Iter 6/10: ladvise speed: 0.383986
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337636
Iter 7/10: OSS cache speed: 0.382761
Iter 7/10: ladvise speed: 0.355357
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.37762
Iter 8/10: OSS cache speed: 0.437534
Iter 8/10: ladvise speed: 0.385777
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.329223
Iter 9/10: OSS cache speed: 0.373845
Iter 9/10: ladvise speed: 0.421093
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.331843
Iter 10/10: OSS cache speed: 0.427996
Iter 10/10: ladvise speed: 0.341533
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0