== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:38:02 (1782225482)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.9573 s, 8.8 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-ffff899e09373000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.404978
Iter 1/10: OSS cache speed: 0.488012
Iter 1/10: ladvise speed: 0.429651
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427058
Iter 2/10: OSS cache speed: 0.467209
Iter 2/10: ladvise speed: 0.460084
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.446264
Iter 3/10: OSS cache speed: 0.472855
Iter 3/10: ladvise speed: 0.412109
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.422315
Iter 4/10: OSS cache speed: 0.473459
Iter 4/10: ladvise speed: 0.454725
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.418081
Iter 5/10: OSS cache speed: 0.441181
Iter 5/10: ladvise speed: 0.421814
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.404274
Iter 6/10: OSS cache speed: 0.402176
Iter 6/10: ladvise speed: 0.422119
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.411875
Iter 7/10: OSS cache speed: 0.427816
Iter 7/10: ladvise speed: 0.467712
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.422161
Iter 8/10: OSS cache speed: 0.482524
Iter 8/10: ladvise speed: 0.406866
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.361198
Iter 9/10: OSS cache speed: 0.431491
Iter 9/10: ladvise speed: 0.426441
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.430914
Iter 10/10: OSS cache speed: 0.434417
Iter 10/10: ladvise speed: 0.488138
Average uncached read: .41
Average speedup with OSS cached read:  .45 = +9%
Average speedup with ladvise willread:  .43 = +4%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0