== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:27:04 (1732429624)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.35362 s, 31.3 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-ffff8800b6f4a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.42344
Iter 1/10: OSS cache speed: 2.83858
Iter 1/10: ladvise speed: 1.2575
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.493926
Iter 2/10: OSS cache speed: 0.542637
Iter 2/10: ladvise speed: 0.75941
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.75586
Iter 3/10: OSS cache speed: 0.874591
Iter 3/10: ladvise speed: 0.978429
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.75914
Iter 4/10: OSS cache speed: 0.80231
Iter 4/10: ladvise speed: 0.572996
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.410483
Iter 5/10: OSS cache speed: 0.426606
Iter 5/10: ladvise speed: 0.443497
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.407147
Iter 6/10: OSS cache speed: 0.382665
Iter 6/10: ladvise speed: 0.350652
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.340537
Iter 7/10: OSS cache speed: 0.381258
Iter 7/10: ladvise speed: 0.411836
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350287
Iter 8/10: OSS cache speed: 0.375605
Iter 8/10: ladvise speed: 0.481952
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405935
Iter 9/10: OSS cache speed: 0.415836
Iter 9/10: ladvise speed: 0.425446
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.427353
Iter 10/10: OSS cache speed: 0.397836
Iter 10/10: ladvise speed: 0.430848
Average uncached read: .67
Average speedup with OSS cached read:  .74 = +10%
Average speedup with ladvise willread:  .61 = +-8%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0