== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:03:20 (1787745800)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.6737 s, 6.7 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-ffff934383ee1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.309205
Iter 1/10: OSS cache speed: 0.291441
Iter 1/10: ladvise speed: 0.315016
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.248686
Iter 2/10: OSS cache speed: 0.32033
Iter 2/10: ladvise speed: 0.299477
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.291221
Iter 3/10: OSS cache speed: 0.309823
Iter 3/10: ladvise speed: 0.25074
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.295385
Iter 4/10: OSS cache speed: 0.315985
Iter 4/10: ladvise speed: 0.317161
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.231174
Iter 5/10: OSS cache speed: 0.31726
Iter 5/10: ladvise speed: 0.331402
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.25803
Iter 6/10: OSS cache speed: 0.311787
Iter 6/10: ladvise speed: 0.361776
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.311405
Iter 7/10: OSS cache speed: 0.303315
Iter 7/10: ladvise speed: 0.310018
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.31178
Iter 8/10: OSS cache speed: 0.302321
Iter 8/10: ladvise speed: 0.365527
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.278293
Iter 9/10: OSS cache speed: 0.314387
Iter 9/10: ladvise speed: 0.327819
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.336989
Iter 10/10: OSS cache speed: 0.402499
Iter 10/10: ladvise speed: 0.359204
Average uncached read: .28
Average speedup with OSS cached read:  .31 = +10%
Average speedup with ladvise willread:  .32 = +14%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0