== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:20:42 (1787908842)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8162 s, 8.9 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-ffff92e7d11f3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358101
Iter 1/10: OSS cache speed: 0.375728
Iter 1/10: ladvise speed: 0.354455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.398281
Iter 2/10: OSS cache speed: 0.410752
Iter 2/10: ladvise speed: 0.327558
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.347173
Iter 3/10: OSS cache speed: 0.408607
Iter 3/10: ladvise speed: 0.401917
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.326616
Iter 4/10: OSS cache speed: 0.373124
Iter 4/10: ladvise speed: 0.403961
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.325169
Iter 5/10: OSS cache speed: 0.39767
Iter 5/10: ladvise speed: 0.413545
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.398988
Iter 6/10: OSS cache speed: 0.448194
Iter 6/10: ladvise speed: 0.374399
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.326692
Iter 7/10: OSS cache speed: 0.37847
Iter 7/10: ladvise speed: 0.379584
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.448985
Iter 8/10: OSS cache speed: 0.424125
Iter 8/10: ladvise speed: 0.413006
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.348703
Iter 9/10: OSS cache speed: 0.331238
Iter 9/10: ladvise speed: 0.398776
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.324124
Iter 10/10: OSS cache speed: 0.388874
Iter 10/10: ladvise speed: 0.277386
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0