== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:40:01 (1787384401)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3887 s, 8.5 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-ffff8d11051b3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37533
Iter 1/10: OSS cache speed: 0.442141
Iter 1/10: ladvise speed: 0.411331
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366146
Iter 2/10: OSS cache speed: 0.396544
Iter 2/10: ladvise speed: 0.439587
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.383091
Iter 3/10: OSS cache speed: 0.415207
Iter 3/10: ladvise speed: 0.390233
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338563
Iter 4/10: OSS cache speed: 0.393547
Iter 4/10: ladvise speed: 0.460236
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357576
Iter 5/10: OSS cache speed: 0.424237
Iter 5/10: ladvise speed: 0.445609
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.343078
Iter 6/10: OSS cache speed: 0.403394
Iter 6/10: ladvise speed: 0.392903
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376953
Iter 7/10: OSS cache speed: 0.390109
Iter 7/10: ladvise speed: 0.398313
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.334809
Iter 8/10: OSS cache speed: 0.358635
Iter 8/10: ladvise speed: 0.396083
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365839
Iter 9/10: OSS cache speed: 0.388865
Iter 9/10: ladvise speed: 0.369909
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.344
Iter 10/10: OSS cache speed: 0.387757
Iter 10/10: ladvise speed: 0.474958
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .41 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0