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 grep
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 indi
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 are
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. A
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 (whoa
