== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:12:40 (1780333960)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2049 s, 8.6 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-ffff95b3c797d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.36498
Iter 1/10: OSS cache speed: 0.326547
Iter 1/10: ladvise speed: 0.385201
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.34578
Iter 2/10: OSS cache speed: 0.359147
Iter 2/10: ladvise speed: 0.399355
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.369938
Iter 3/10: OSS cache speed: 0.318723
Iter 3/10: ladvise speed: 0.312359
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.336292
Iter 4/10: OSS cache speed: 0.33672
Iter 4/10: ladvise speed: 0.343335
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.351159
Iter 5/10: OSS cache speed: 0.298049
Iter 5/10: ladvise speed: 0.299669
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.324477
Iter 6/10: OSS cache speed: 0.328705
Iter 6/10: ladvise speed: 0.311061
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.338232
Iter 7/10: OSS cache speed: 0.369383
Iter 7/10: ladvise speed: 0.391431
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.407398
Iter 8/10: OSS cache speed: 0.420373
Iter 8/10: ladvise speed: 0.414804
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.388279
Iter 9/10: OSS cache speed: 0.380856
Iter 9/10: ladvise speed: 0.407526
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.41599
Iter 10/10: OSS cache speed: 0.391127
Iter 10/10: ladvise speed: 0.38015
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0