== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:02:29 (1789675349)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.633 s, 8.3 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-ffff8e4d42bb7800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364081
Iter 1/10: OSS cache speed: 0.425844
Iter 1/10: ladvise speed: 0.339971
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.3517
Iter 2/10: OSS cache speed: 0.358655
Iter 2/10: ladvise speed: 0.382322
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.380932
Iter 3/10: OSS cache speed: 0.390727
Iter 3/10: ladvise speed: 0.419883
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.425676
Iter 4/10: OSS cache speed: 0.445394
Iter 4/10: ladvise speed: 0.435829
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.415058
Iter 5/10: OSS cache speed: 0.424856
Iter 5/10: ladvise speed: 0.409766
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.384071
Iter 6/10: OSS cache speed: 0.39369
Iter 6/10: ladvise speed: 0.334545
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.367618
Iter 7/10: OSS cache speed: 0.385798
Iter 7/10: ladvise speed: 0.33443
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359701
Iter 8/10: OSS cache speed: 0.365677
Iter 8/10: ladvise speed: 0.351059
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.372429
Iter 9/10: OSS cache speed: 0.362174
Iter 9/10: ladvise speed: 0.34146
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.357854
Iter 10/10: OSS cache speed: 0.333064
Iter 10/10: ladvise speed: 0.408987
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .37 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0