[DeviceSanitizer] Memory overhead statistics

[AllanZyne]

LLVM: intel/llvm#14592

Statistic memory overhead (usm redzone + shadow memory) on each context, enabled by exporting asan flag UR_LAYER_ASAN_OPTIONS=print_stats:1.

Addtionally, move "AsanOptions" under "SanitizerInterceptor".

[yingcong-wu]

It occurs to me that this only measures the redzone overhead, I think we should also mean the total overhead including shadow memory and other usages. Maybe we can implement a thin layer that keeps track of all memory allocation and compares the data with and without the sanitizer layer. That way we can have the overall memory overhead data instead of only the redzone overhead.

[AllanZyne]

It occurs to me that this only measures the redzone overhead, I think we should also mean the total overhead including shadow memory and other usages.

No, actually it includes shadow memory.

[AllanZyne]

Hi @pbalcer @kswiecicki, please review. Thanks!

[AllanZyne]

Hi @pbalcer, I think the failed CIs are unrelated, could you please double check this? Thanks!

[pbalcer]

@AllanZyne they are indeed. I'll mark it ready to merge after you get approval from @yingcong-wu.

[yingcong-wu]

Just a idea and a nit, can we create a warpper to check PrintStats, and avoid (as much as we can) the overhead of this statistics when we not enable the tracking?

[AllanZyne]

Good idea. Done.

[pbalcer]

I resolved a conflict and rebased the PR.

... but it didn't work :-) please rebase and update the PR. Thanks.

[AllanZyne]

I resolved a conflict and rebased the PR.

... but it didn't work :-) please rebase and update the PR. Thanks.

No problem. Done.

[aarongreig]

looking to merge this soon, are @zhaomaosu and @kswiecicki still required reviewers?