== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:12:46 (1746144766)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.38271 s, 23.9 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-ffff8800b5ccf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.903325
Iter 1/10: OSS cache speed: 1.13232
Iter 1/10: ladvise speed: 1.34287
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.02018
Iter 2/10: OSS cache speed: 1.22526
Iter 2/10: ladvise speed: 1.64298
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.14561
Iter 3/10: OSS cache speed: 1.28646
Iter 3/10: ladvise speed: 1.3907
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.31701
Iter 4/10: OSS cache speed: 1.35709
Iter 4/10: ladvise speed: 0.903697
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.859275
Iter 5/10: OSS cache speed: 1.04425
Iter 5/10: ladvise speed: 1.18118
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.12783
Iter 6/10: OSS cache speed: 1.06529
Iter 6/10: ladvise speed: 0.951966
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.880737
Iter 7/10: OSS cache speed: 0.953858
Iter 7/10: ladvise speed: 1.12278
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.901842
Iter 8/10: OSS cache speed: 0.968077
Iter 8/10: ladvise speed: 0.995849
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.872278
Iter 9/10: OSS cache speed: 0.939381
Iter 9/10: ladvise speed: 1.06809
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.884034
Iter 10/10: OSS cache speed: 1.07544
Iter 10/10: ladvise speed: 0.91304
Average uncached read: .99
Average speedup with OSS cached read:  1.10 = +11%
Average speedup with ladvise willread:  1.15 = +16%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0