== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:05:14 (1779977114)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1584 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-ffff8d2a82b84000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368045
Iter 1/10: OSS cache speed: 0.372153
Iter 1/10: ladvise speed: 0.41401
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.432509
Iter 2/10: OSS cache speed: 0.357517
Iter 2/10: ladvise speed: 0.390841
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.34706
Iter 3/10: OSS cache speed: 0.452976
Iter 3/10: ladvise speed: 0.450124
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.387082
Iter 4/10: OSS cache speed: 0.44957
Iter 4/10: ladvise speed: 0.405074
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.365413
Iter 5/10: OSS cache speed: 0.418462
Iter 5/10: ladvise speed: 0.427015
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372699
Iter 6/10: OSS cache speed: 0.426107
Iter 6/10: ladvise speed: 0.369883
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.309725
Iter 7/10: OSS cache speed: 0.393838
Iter 7/10: ladvise speed: 0.385773
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.330567
Iter 8/10: OSS cache speed: 0.457812
Iter 8/10: ladvise speed: 0.344238
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.475981
Iter 9/10: OSS cache speed: 0.387449
Iter 9/10: ladvise speed: 0.423427
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.431879
Iter 10/10: OSS cache speed: 0.456333
Iter 10/10: ladvise speed: 0.353943
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .39 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0