Re: [boost] cache size runtime detection

Subject: Re: [boost] cache size runtime detection
From: Paul A. Bristow (pbristow_at_[hidden])
Date: 2015-08-17 12:02:09

> -----Original Message-----
> From: Boost [mailto:boost-bounces_at_[hidden]] On Behalf Of Andrey Semashev
> Sent: 17 August 2015 15:42
> To: boost_at_[hidden]
> Subject: Re: [boost] cache size runtime detection
> 
> On 17.08.2015 17:28, Joel FALCOU wrote:
> > We have a bunch of cross-platform CPU cache size and cache line size
> > detection that we want to offload into boost in preparation for the
> > first reviewable version of Boost.SIMD.
> >
> > It's rather smallish in term of API but the code is non-trivial. I
> > think it's a bit broad to be in utility/core, doesn't really fit in
> > align and IIRC there is no "general memory related" library in Boost.
> >
> > Questions:
> >
> > 1/ would there be interest to have such utility in Boost ?
> 
> Yes. At least, that would be interesting for me.
> 
> > 2/ here should we put it ? Is Boost.Memory a viable solution or could
> > it be hosted somewhere non-trivial ?
> 
> It should definitely be a dedicated library. What I was thinking of for quite some time is a bit
broader.
> My idea is a system capabilities library (Boost.SystemCaps) which would offer a generic interface
for
> querying the current system properties such as:
> 
> - Number of CPU cores/threads.
> - Current CPU core capabilities (vendor string, instruction set extensions, cache properties,
etc.).
> Probably, this would need to support heterogenous systems as well.
> - System RAM size.
> - OS version string.
> 
> There may be many more properties to query for in the future, but at least those would be a good
> start, IMHO.

Sounds very sensible to me too.

Paul

---
Paul A. Bristow
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