== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:24:19 (1780334659)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5252 s, 7.8 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-ffff984184ca6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.325886
Iter 1/10: OSS cache speed: 0.284072
Iter 1/10: ladvise speed: 0.351055
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.340903
Iter 2/10: OSS cache speed: 0.275347
Iter 2/10: ladvise speed: 0.267182
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.34946
Iter 3/10: OSS cache speed: 0.346194
Iter 3/10: ladvise speed: 0.316092
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.367161
Iter 4/10: OSS cache speed: 0.372936
Iter 4/10: ladvise speed: 0.409866
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359984
Iter 5/10: OSS cache speed: 0.322552
Iter 5/10: ladvise speed: 0.293427
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388099
Iter 6/10: OSS cache speed: 0.346066
Iter 6/10: ladvise speed: 0.35961
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380264
Iter 7/10: OSS cache speed: 0.343621
Iter 7/10: ladvise speed: 0.343459
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.367907
Iter 8/10: OSS cache speed: 0.375578
Iter 8/10: ladvise speed: 0.345916
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.387639
Iter 9/10: OSS cache speed: 0.38949
Iter 9/10: ladvise speed: 0.315713
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.408875
Iter 10/10: OSS cache speed: 0.372464
Iter 10/10: ladvise speed: 0.358255
Average uncached read: .36
Average speedup with OSS cached read:  .34 = +-5%
Average speedup with ladvise willread:  .33 = +-8%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0