== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:18:12 (1789118292)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7167 s, 8.9 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-ffff9f5844df9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.406794
Iter 1/10: OSS cache speed: 0.427864
Iter 1/10: ladvise speed: 0.391631
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.363428
Iter 2/10: OSS cache speed: 0.441682
Iter 2/10: ladvise speed: 0.385209
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.437455
Iter 3/10: OSS cache speed: 0.450791
Iter 3/10: ladvise speed: 0.451723
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.427078
Iter 4/10: OSS cache speed: 0.431083
Iter 4/10: ladvise speed: 0.427269
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.375214
Iter 5/10: OSS cache speed: 0.417396
Iter 5/10: ladvise speed: 0.426206
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403215
Iter 6/10: OSS cache speed: 0.375998
Iter 6/10: ladvise speed: 0.396581
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.403583
Iter 7/10: OSS cache speed: 0.405352
Iter 7/10: ladvise speed: 0.407267
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.397337
Iter 8/10: OSS cache speed: 0.410323
Iter 8/10: ladvise speed: 0.379248
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.41931
Iter 9/10: OSS cache speed: 0.424202
Iter 9/10: ladvise speed: 0.423158
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.413316
Iter 10/10: OSS cache speed: 0.451771
Iter 10/10: ladvise speed: 0.430772
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .41 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0