== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:14:43 (1788462883)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8642 s, 7.6 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-ffff8a32865d9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.273811
Iter 1/10: OSS cache speed: 0.365651
Iter 1/10: ladvise speed: 0.366716
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.368533
Iter 2/10: OSS cache speed: 0.412777
Iter 2/10: ladvise speed: 0.389907
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387968
Iter 3/10: OSS cache speed: 0.46957
Iter 3/10: ladvise speed: 0.429093
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.378205
Iter 4/10: OSS cache speed: 0.383647
Iter 4/10: ladvise speed: 0.368179
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.372389
Iter 5/10: OSS cache speed: 0.390976
Iter 5/10: ladvise speed: 0.43754
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.362945
Iter 6/10: OSS cache speed: 0.387528
Iter 6/10: ladvise speed: 0.404759
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.309058
Iter 7/10: OSS cache speed: 0.423911
Iter 7/10: ladvise speed: 0.392168
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.41818
Iter 8/10: OSS cache speed: 0.474175
Iter 8/10: ladvise speed: 0.393218
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310965
Iter 9/10: OSS cache speed: 0.297137
Iter 9/10: ladvise speed: 0.457185
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367268
Iter 10/10: OSS cache speed: 0.416765
Iter 10/10: ladvise speed: 0.429562
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .40 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0