== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:49:29 (1790102969)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3515 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-ffff9136516b9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.299651
Iter 1/10: OSS cache speed: 0.362312
Iter 1/10: ladvise speed: 0.37129
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371516
Iter 2/10: OSS cache speed: 0.423217
Iter 2/10: ladvise speed: 0.373999
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.27679
Iter 3/10: OSS cache speed: 0.349002
Iter 3/10: ladvise speed: 0.429512
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.400973
Iter 4/10: OSS cache speed: 0.488027
Iter 4/10: ladvise speed: 0.496899
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.447474
Iter 5/10: OSS cache speed: 0.528545
Iter 5/10: ladvise speed: 0.312375
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332069
Iter 6/10: OSS cache speed: 0.475697
Iter 6/10: ladvise speed: 0.478774
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.436553
Iter 7/10: OSS cache speed: 0.436528
Iter 7/10: ladvise speed: 0.419779
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359482
Iter 8/10: OSS cache speed: 0.392004
Iter 8/10: ladvise speed: 0.455038
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.384852
Iter 9/10: OSS cache speed: 0.349571
Iter 9/10: ladvise speed: 0.466289
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.341293
Iter 10/10: OSS cache speed: 0.371176
Iter 10/10: ladvise speed: 0.45536
Average uncached read: .36
Average speedup with OSS cached read:  .41 = +13%
Average speedup with ladvise willread:  .42 = +16%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0