[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] Help on TLB Flush

From: Peter Maydell
Subject: Re: [Qemu-devel] Help on TLB Flush
Date: Thu, 12 Feb 2015 15:01:02 +0000

On 12 February 2015 at 14:45, Alexander Graf <address@hidden> wrote:
>> On 12.02.2015, at 15:35, Mark Burton <address@hidden> wrote:
>> We are proposing to implement this by signalling all other CPU’s
>> to exit (and requesting they flush before re-starting). In other
>> words, this would happen asynchronously.
> For global flushes, give them a pointer payload along with the flush
> request and tell all cpus to increment it atomically. In your main
> thread, wait until *ptr == nKickedCpus.

I bet this will not be the only situation where you want to
do an "get all other CPUs to do $something and wait til they
have done so" kind of operation, so some lightweight but generic
infrastructure for doing that would not be a bad plan. (Similarly
"get all other CPUs to stop, then I can do $something and let
the others continue".)

-- PMM

reply via email to

[Prev in Thread] Current Thread [Next in Thread]