== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:01:25 (1787796085)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6381 s, 9.9 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-ffff9bd1c9944000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.386256
Iter 1/10: OSS cache speed: 0.39
Iter 1/10: ladvise speed: 0.385693
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.378381
Iter 2/10: OSS cache speed: 0.360762
Iter 2/10: ladvise speed: 0.34308
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.333074
Iter 3/10: OSS cache speed: 0.331916
Iter 3/10: ladvise speed: 0.34014
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.331744
Iter 4/10: OSS cache speed: 0.334725
Iter 4/10: ladvise speed: 0.300841
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359875
Iter 5/10: OSS cache speed: 0.332814
Iter 5/10: ladvise speed: 0.331567
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370753
Iter 6/10: OSS cache speed: 0.348302
Iter 6/10: ladvise speed: 0.353331
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.33568
Iter 7/10: OSS cache speed: 0.36271
Iter 7/10: ladvise speed: 0.363206
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382879
Iter 8/10: OSS cache speed: 0.362243
Iter 8/10: ladvise speed: 0.370332
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.37226
Iter 9/10: OSS cache speed: 0.390649
Iter 9/10: ladvise speed: 0.370775
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.362369
Iter 10/10: OSS cache speed: 0.382193
Iter 10/10: ladvise speed: 0.35106
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .35 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0