Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?

Hi!

On 2/14/23 12:11, David Geier wrote:
> Hi,
>
> I think I fixed the compilation errors. It was due to a few variables 
> being declared under
>
> #if defined(__x86_64__) && defined(__linux__)
>
> while being used also under non x86 Linux.
>
> I also removed again the code to obtain the TSC frequency under 
> hypervisors because the TSC is usually emulated and therefore no 
> faster than clock_gettime() anyways. So we now simply fallback to 
> clock_gettime() on hypervisors when we cannot obtain the frequency via 
> leaf 0x16.
>
> Beyond that I reviewed the first two patches a while ago in [1]. I 
> hope we can progress with them to further reduce the size of this 
> patch set.
>
> [1] 
> https://www.postgresql.org/message-id/3ac157f7-085d-e071-45fc-b87cd306360c%40gmail.com 
>
>
It still fails.

I'll get Cirrus-CI working on my own Github fork so I can make sure it 
really compiles on all platforms before I submit a new version.

-- 
David Geier
(ServiceNow)