Re: Sudden slowdown of ARM emulation in master

[Igor Mammedov]

On Wed, 26 Feb 2020 09:45:48 +0100
Howard Spoelstra <address@hidden> wrote:

> On Wed, Feb 26, 2020 at 9:42 AM Peter Maydell <address@hidden>
> wrote:
> 
> > On Tue, 25 Feb 2020 at 23:08, Niek Linnenbank <address@hidden>
> > wrote:
> >  
> > > Just now I was working on some small fixes for the cubieboard machine  
> > and rebasing my Allwinner H3 branches.  
> > > While doing some testing, I noticed that suddenly the machines were much  
> > slower than before.  
> > > I only see this happening when I rebase to this commit:
> > >    ca6155c0f2bd39b4b4162533be401c98bd960820 ("Merge tag 'patchew/  
> > address@hidden' of
> > https://github.com/patchew-project/qemu into HEAD")
> >
> > Yeah, I noticed a slowdown yesterday as well, but haven't tracked it down
> > as yet. The first thing would be to do a git bisect to try to narrow
> > down what commit caused it.
> >
> > thanks
> > -- PMM
> >  
> 
> 
> Perhaps related? I noticed a slow down on qemu-system-ppc and tracked it
> down here:
> https://lists.nongnu.org/archive/html/qemu-devel/2020-02/msg07262.html

There might be some implicit dependency in TCG that depends on ram_size.
I'm looking for what it could be

> Best,
> Howard