== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:21:28 (1746156088)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.43628 s, 23.6 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-ffff88012a546800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.711688
Iter 1/10: OSS cache speed: 0.691503
Iter 1/10: ladvise speed: 0.692231
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.721556
Iter 2/10: OSS cache speed: 0.691477
Iter 2/10: ladvise speed: 0.718029
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.789815
Iter 3/10: OSS cache speed: 0.744144
Iter 3/10: ladvise speed: 0.691957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.682469
Iter 4/10: OSS cache speed: 0.810983
Iter 4/10: ladvise speed: 0.894568
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.85632
Iter 5/10: OSS cache speed: 0.810272
Iter 5/10: ladvise speed: 0.952585
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.930644
Iter 6/10: OSS cache speed: 0.893822
Iter 6/10: ladvise speed: 0.698554
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.886674
Iter 7/10: OSS cache speed: 0.832009
Iter 7/10: ladvise speed: 0.835417
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.787682
Iter 8/10: OSS cache speed: 0.790756
Iter 8/10: ladvise speed: 0.77256
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.894802
Iter 9/10: OSS cache speed: 0.919972
Iter 9/10: ladvise speed: 0.843433
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.969483
Iter 10/10: OSS cache speed: 0.836721
Iter 10/10: ladvise speed: 0.898194
Average uncached read: .82
Average speedup with OSS cached read:  .80 = +-2%
Average speedup with ladvise willread:  .79 = +-3%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0