== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:23:38 (1779989018)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2695 s, 8.5 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-ffff8cf38a269000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.459957
Iter 1/10: OSS cache speed: 0.440418
Iter 1/10: ladvise speed: 0.43847
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.441767
Iter 2/10: OSS cache speed: 0.503326
Iter 2/10: ladvise speed: 0.456395
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.446879
Iter 3/10: OSS cache speed: 0.384435
Iter 3/10: ladvise speed: 0.44936
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.359427
Iter 4/10: OSS cache speed: 0.466813
Iter 4/10: ladvise speed: 0.375719
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387824
Iter 5/10: OSS cache speed: 0.3691
Iter 5/10: ladvise speed: 0.409452
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.368766
Iter 6/10: OSS cache speed: 0.342844
Iter 6/10: ladvise speed: 0.359583
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.447605
Iter 7/10: OSS cache speed: 0.332443
Iter 7/10: ladvise speed: 0.395446
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.365156
Iter 8/10: OSS cache speed: 0.333794
Iter 8/10: ladvise speed: 0.401459
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.41066
Iter 9/10: OSS cache speed: 0.382878
Iter 9/10: ladvise speed: 0.423693
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.43554
Iter 10/10: OSS cache speed: 0.456966
Iter 10/10: ladvise speed: 0.456323
Average uncached read: .41
Average speedup with OSS cached read:  .40 = +-2%
Average speedup with ladvise willread:  .41 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0