== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:33:56 (1788654836)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1362 s, 8.0 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-ffff9431866e5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368767
Iter 1/10: OSS cache speed: 0.412058
Iter 1/10: ladvise speed: 0.380738
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.391215
Iter 2/10: OSS cache speed: 0.361431
Iter 2/10: ladvise speed: 0.359613
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.334995
Iter 3/10: OSS cache speed: 0.357308
Iter 3/10: ladvise speed: 0.362686
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.369208
Iter 4/10: OSS cache speed: 0.363618
Iter 4/10: ladvise speed: 0.367555
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.402659
Iter 5/10: OSS cache speed: 0.358831
Iter 5/10: ladvise speed: 0.261074
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356345
Iter 6/10: OSS cache speed: 0.368305
Iter 6/10: ladvise speed: 0.347196
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380227
Iter 7/10: OSS cache speed: 0.340676
Iter 7/10: ladvise speed: 0.337607
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.336256
Iter 8/10: OSS cache speed: 0.312891
Iter 8/10: ladvise speed: 0.350229
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.327686
Iter 9/10: OSS cache speed: 0.365532
Iter 9/10: ladvise speed: 0.271217
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.350205
Iter 10/10: OSS cache speed: 0.329042
Iter 10/10: ladvise speed: 0.320924
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .33 = +-8%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0