From: "Alex Bennée" <alex.bennee@linaro.org>
To: Richard Henderson <rth@twiddle.net>
Cc: qemu-devel <qemu-devel@nongnu.org>,
Pranith Kumar <bobby.prani@gmail.com>
Subject: Re: [Qemu-devel] target-alpha mttcg success
Date: Sun, 13 Nov 2016 09:39:20 +0000 [thread overview]
Message-ID: <878tsnafcn.fsf@linaro.org> (raw)
In-Reply-To: <54f6f6ed-9d1e-1bce-d665-a282863c2028@twiddle.net>
Richard Henderson <rth@twiddle.net> writes:
>> PID USER PR NI VIRT RES S P %CPU %MEM TIME+ COMMAND
>> 7817 rth 20 0 5304360 712404 R 3 94.4 9.1 2:45.21 qemu-system-alp
>> 7819 rth 20 0 5304360 712404 R 1 90.7 9.1 2:01.84 qemu-system-alp
>> 7818 rth 20 0 5304360 712404 R 2 90.1 9.1 2:04.52 qemu-system-alp
>> 7820 rth 20 0 5304360 712404 R 0 89.4 9.1 1:49.37 qemu-system-alp
>> 7811 rth 20 0 5304360 712404 S 1 9.6 9.1 0:10.76 qemu-system-alp
>
> Whee! During a guest make -j4 build of glibc.
\o/
>
> On top of Alex's latest patch set all that is required for basic success is an
> update to the alpha bios. Which until today didn't support smp at all.
>
> There does appear to be a problem with delivery of ISA interrupts for smp,
> regardless whether mttcg is enabled or not, though PCI interrupts are working
> fine. This appears in that both serial console and ps2 keyboard are
> non-responsive, but one can ssh into the guest. Which doesn't make a whole lot
> of sense. More debugging required, I suppose.
Hmm weird. I was helping Pranith with debugging one of his aarch64 guest
setups under TCG and it seemed to be loosing IRQs, I could see level=1
breakpoints being hit in qemu_set_irq but no delivery of the IRQ to the
CPU. Unfortunately I had to head home before we got to the bottom of it
but I wonder if it is related.
As far as the core code is concerned IRQ updates should be protected by
the BQL.
>
> I'll post the palcode update once the mttcg patch set is merged.
>
>
> r~
Good stuff ;-)
--
Alex Bennée
next prev parent reply other threads:[~2016-11-13 9:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-12 16:57 [Qemu-devel] target-alpha mttcg success Richard Henderson
2016-11-13 9:39 ` Alex Bennée [this message]
2016-11-13 11:03 ` Richard Henderson
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