== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:04:08 (1746792248)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.33296 s, 44.9 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-ffff8800b36fd800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.17726
Iter 1/10: OSS cache speed: 2.48937
Iter 1/10: ladvise speed: 1.95689
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.93702
Iter 2/10: OSS cache speed: 2.43405
Iter 2/10: ladvise speed: 2.07073
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.75223
Iter 3/10: OSS cache speed: 2.80604
Iter 3/10: ladvise speed: 2.24181
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.20995
Iter 4/10: OSS cache speed: 2.62948
Iter 4/10: ladvise speed: 2.316
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.69756
Iter 5/10: OSS cache speed: 1.99619
Iter 5/10: ladvise speed: 1.48646
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.85733
Iter 6/10: OSS cache speed: 1.79
Iter 6/10: ladvise speed: 2.18829
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.09171
Iter 7/10: OSS cache speed: 2.04063
Iter 7/10: ladvise speed: 2.37817
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.79483
Iter 8/10: OSS cache speed: 2.34349
Iter 8/10: ladvise speed: 2.12485
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.37393
Iter 9/10: OSS cache speed: 2.31562
Iter 9/10: ladvise speed: 2.08111
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.82149
Iter 10/10: OSS cache speed: 2.0146
Iter 10/10: ladvise speed: 2.05572
Average uncached read: 2.27
Average speedup with OSS cached read:  2.28 = +0%
Average speedup with ladvise willread:  2.09 = +-7%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0