== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:33:23 (1787391203)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2431 s, 10.2 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-ffff9c5cd39f8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361196
Iter 1/10: OSS cache speed: 0.35367
Iter 1/10: ladvise speed: 0.304898
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.260504
Iter 2/10: OSS cache speed: 0.282905
Iter 2/10: ladvise speed: 0.316509
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.312284
Iter 3/10: OSS cache speed: 0.307626
Iter 3/10: ladvise speed: 0.310549
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.294879
Iter 4/10: OSS cache speed: 0.312733
Iter 4/10: ladvise speed: 0.319085
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334329
Iter 5/10: OSS cache speed: 0.333045
Iter 5/10: ladvise speed: 0.339262
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367898
Iter 6/10: OSS cache speed: 0.346225
Iter 6/10: ladvise speed: 0.295779
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.335737
Iter 7/10: OSS cache speed: 0.347052
Iter 7/10: ladvise speed: 0.312062
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382844
Iter 8/10: OSS cache speed: 0.308771
Iter 8/10: ladvise speed: 0.362949
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.325384
Iter 9/10: OSS cache speed: 0.326541
Iter 9/10: ladvise speed: 0.321432
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.359155
Iter 10/10: OSS cache speed: 0.316071
Iter 10/10: ladvise speed: 0.33747
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0