On Sun, Mar 13, 2022 at 04:18:40PM +0100, Paolo Bonzini wrote:
> On 3/11/22 13:17, Daniel P. Berrangé wrote:
> The question is what is easier to maintain, stack switching code that is
> becoming less and less portable (status quo with SafeStack, CET and the TLS
> issues that Stefan has worked on),
On 3/11/22 13:17, Daniel P. Berrangé wrote:
Only files that define or use a coroutine_fn (which includes callers of
qemu_coroutine_create) would have to be compiled as C++.
Unless I'm misunderstanding what you mean, "define a coroutine_fn"
is a very large number of functions/files
$ git
On Fri, Mar 11, 2022 at 01:04:33PM +0100, Paolo Bonzini wrote:
> On 3/11/22 10:27, Stefan Hajnoczi wrote:
> > > Not quite voluntarily, but I noticed I had to add one 0 to make them run
> > > for
> > > a decent amount of time. So yeah, it's much faster than siglongjmp.
> > That's a nice first
On 3/11/22 10:27, Stefan Hajnoczi wrote:
Not quite voluntarily, but I noticed I had to add one 0 to make them run for
a decent amount of time. So yeah, it's much faster than siglongjmp.
That's a nice first indication that performance will be good. I guess
that deep coroutine_fn stacks could be
On Thu, Mar 10, 2022 at 09:14:07PM +0100, Paolo Bonzini wrote:
> On 3/10/22 18:42, Stefan Hajnoczi wrote:
> > There are a lot of details to decide on in the translator tool and
> > runtime to optimize the code. I think the way the stack frames are
> > organized in this patch series is probably for
On 3/10/22 18:42, Stefan Hajnoczi wrote:
There are a lot of details to decide on in the translator tool and
runtime to optimize the code. I think the way the stack frames are
organized in this patch series is probably for convenience rather than
performance.
Yes, sometimes the optimizations
On Thu, Mar 10, 2022 at 01:43:38PM +0100, Paolo Bonzini wrote:
> Here is an experiment with using stackless coroutines in QEMU. It
> only compiles enough code to run tests/unit/test-coroutine, but at
> least it proves that it's possible to quickly test ideas in the
> area of coroutine runtimes.
Here is an experiment with using stackless coroutines in QEMU. It
only compiles enough code to run tests/unit/test-coroutine, but at
least it proves that it's possible to quickly test ideas in the
area of coroutine runtimes. Another idea that could be toyed with
in a similar manner could be
