== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:43:54 (1768301034)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3221 s, 7.9 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-ffff9da0c7c3b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.352479
Iter 1/10: OSS cache speed: 0.457145
Iter 1/10: ladvise speed: 0.384942
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.401285
Iter 2/10: OSS cache speed: 0.389201
Iter 2/10: ladvise speed: 0.411136
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.39057
Iter 3/10: OSS cache speed: 0.406536
Iter 3/10: ladvise speed: 0.394003
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.376926
Iter 4/10: OSS cache speed: 0.370046
Iter 4/10: ladvise speed: 0.461953
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.457062
Iter 5/10: OSS cache speed: 0.476107
Iter 5/10: ladvise speed: 0.393887
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.457693
Iter 6/10: OSS cache speed: 0.399594
Iter 6/10: ladvise speed: 0.397042
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.356853
Iter 7/10: OSS cache speed: 0.325316
Iter 7/10: ladvise speed: 0.3688
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342273
Iter 8/10: OSS cache speed: 0.424249
Iter 8/10: ladvise speed: 0.412486
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.342027
Iter 9/10: OSS cache speed: 0.378328
Iter 9/10: ladvise speed: 0.35145
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.374029
Iter 10/10: OSS cache speed: 0.452917
Iter 10/10: ladvise speed: 0.427512
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .40 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0