== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:12:43 (1746072763)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 7.6655 s, 13.7 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-ffff8800b60df000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.478561
Iter 1/10: OSS cache speed: 0.467394
Iter 1/10: ladvise speed: 0.465489
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.476316
Iter 2/10: OSS cache speed: 0.499083
Iter 2/10: ladvise speed: 0.561932
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.565176
Iter 3/10: OSS cache speed: 0.566134
Iter 3/10: ladvise speed: 0.5467
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.516917
Iter 4/10: OSS cache speed: 0.54579
Iter 4/10: ladvise speed: 0.551173
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.517937
Iter 5/10: OSS cache speed: 0.535956
Iter 5/10: ladvise speed: 0.500681
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.537029
Iter 6/10: OSS cache speed: 0.565802
Iter 6/10: ladvise speed: 0.532598
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.530486
Iter 7/10: OSS cache speed: 0.539122
Iter 7/10: ladvise speed: 0.554189
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.529345
Iter 8/10: OSS cache speed: 0.532989
Iter 8/10: ladvise speed: 0.535766
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.514979
Iter 9/10: OSS cache speed: 0.558626
Iter 9/10: ladvise speed: 0.574641
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.57856
Iter 10/10: OSS cache speed: 0.568655
Iter 10/10: ladvise speed: 0.601519
Average uncached read: .52
Average speedup with OSS cached read:  .53 = +1%
Average speedup with ladvise willread:  .54 = +3%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0