== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:33:08 (1787603588)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4538 s, 8.4 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-ffff8f9102cb9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.442908
Iter 1/10: OSS cache speed: 0.472884
Iter 1/10: ladvise speed: 0.541245
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.505034
Iter 2/10: OSS cache speed: 0.503509
Iter 2/10: ladvise speed: 0.49197
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.46059
Iter 3/10: OSS cache speed: 0.468859
Iter 3/10: ladvise speed: 0.438989
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.41735
Iter 4/10: OSS cache speed: 0.43474
Iter 4/10: ladvise speed: 0.461142
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.443946
Iter 5/10: OSS cache speed: 0.401971
Iter 5/10: ladvise speed: 0.481314
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.364036
Iter 6/10: OSS cache speed: 0.388966
Iter 6/10: ladvise speed: 0.414797
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.48627
Iter 7/10: OSS cache speed: 0.417792
Iter 7/10: ladvise speed: 0.406626
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.467349
Iter 8/10: OSS cache speed: 0.339568
Iter 8/10: ladvise speed: 0.344069
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.42169
Iter 9/10: OSS cache speed: 0.415507
Iter 9/10: ladvise speed: 0.363814
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.325871
Iter 10/10: OSS cache speed: 0.33533
Iter 10/10: ladvise speed: 0.411016
Average uncached read: .43
Average speedup with OSS cached read:  .41 = +-4%
Average speedup with ladvise willread:  .43 = +0%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0