== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:43:00 (1787740980)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.6595 s, 5.3 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-ffff9727c4db9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.324187
Iter 1/10: OSS cache speed: 0.319695
Iter 1/10: ladvise speed: 0.369615
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310869
Iter 2/10: OSS cache speed: 0.343679
Iter 2/10: ladvise speed: 0.265991
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.24609
Iter 3/10: OSS cache speed: 0.329733
Iter 3/10: ladvise speed: 0.359625
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.290105
Iter 4/10: OSS cache speed: 0.359457
Iter 4/10: ladvise speed: 0.251683
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.254317
Iter 5/10: OSS cache speed: 0.308987
Iter 5/10: ladvise speed: 0.305536
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.341928
Iter 6/10: OSS cache speed: 0.339986
Iter 6/10: ladvise speed: 0.318028
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.259578
Iter 7/10: OSS cache speed: 0.308729
Iter 7/10: ladvise speed: 0.316904
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.299506
Iter 8/10: OSS cache speed: 0.369581
Iter 8/10: ladvise speed: 0.395003
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.352748
Iter 9/10: OSS cache speed: 0.324851
Iter 9/10: ladvise speed: 0.349817
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.309557
Iter 10/10: OSS cache speed: 0.332558
Iter 10/10: ladvise speed: 0.384638
Average uncached read: .29
Average speedup with OSS cached read:  .33 = +13%
Average speedup with ladvise willread:  .33 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0