Hi -
On Tue, Nov 08, 2011 at 11:22:35AM +0100, Ingo Molnar wrote:
[...] These examples show *PICTURE PERFECT* forwards ABI
compatibility, using the ancient perf tool on a bleeding edge
kernel. [...]
Almost: they demonstrate that those parts of the ABI that these
particular perf commands
Ingo Molnar mi...@elte.hu writes:
[...]
It's problem enough that there's no way to know what version of the
perf_event abi you are running against and we have to guess based
on kernel version. This gets fun because all of the vendors have
backported seemingly random chunks of perf_event
$ caojsxlfcjkak7lw4m15g44k11zrcf7tnu9ymbiqydbnzr+8...@mail.gmail.com
From: f...@redhat.com (Frank Ch. Eigler)
Date: Sun, 06 Nov 2011 17:08:48 -0500
In-Reply-To:
caojsxlfcjkak7lw4m15g44k11zrcf7tnu9ymbiqydbnzr+8...@mail.gmail.com (Pekka
Enberg's message of Sun, 6 Nov 2011 20:05:45 +0200
Soeren Sandmann sandm...@daimi.au.dk writes:
[...]
- What is going on inside QEMU?
- Which client is the X server servicing?
- What parts of a python/shell/scheme/javascript program is
taking the most CPU time?
[...]
These kinds of questions usually
mingo wrote:
[...]
No, the split-repository situation was the smallest problem after all. Its
was a community thing. If the community doesn't work a single-repo project
will also fail. [...]
So, what do you think creates code communities and keeps them alive?
Developers and code. And
Ingo Molnar mi...@elte.hu writes:
[...]
Distributions are very eager to update kernels even in stable periods of the
distro lifetime - they are much less willing to update user-space packages.
[...]
Sorry, er, what? What distributions eagerly upgrade kernels in stable
periods, were it not
Hi -
[...]
Distributions are very eager to update kernels even in stable periods of
the
distro lifetime - they are much less willing to update user-space
packages.
[...]
Sorry, er, what? What distributions eagerly upgrade kernels in stable
periods, were it not
Hi -
On Thu, Mar 18, 2010 at 03:25:04PM +0100, Ingo Molnar wrote:
[...]
Us guys reading and participating on the list. ;)
I'd like to second that - i'm actually quite happy to update the distro
kernel. Also, i have rarely any problems even with bleeding edge kernels in
rawhide - they
Frederic Weisbecker fweis...@gmail.com writes:
[...] It is actually because both kernel and user side are sync in
this scheme. [...]
This argues that co-evolution of an interface is easiest on the
developers if they own both sides of that interface. No quarrel.
This does not argue that
Ingo Molnar mi...@elte.hu writes:
[...]
I.e. we really want to be able users to:
1) have it all working with a single guest, without having to specify
'which'
guest (qemu PID) to work with. That is the dominant usecase both for
developers and for a fair portion of testers.
Hi -
On Tue, Mar 16, 2010 at 04:52:21PM +0100, Ingo Molnar wrote:
[...]
Perhaps the fact that kvm happens to deal with an interesting application
area (virtualization) is misleading here. As far as the host kernel or
other host userspace is concerned, qemu is just some random
Hi -
On Tue, Mar 16, 2010 at 06:04:10PM -0500, Anthony Liguori wrote:
[...]
The only way to really address this is to change the interaction.
Instead of running perf externally to qemu, we should support a perf
command in the qemu monitor that can then tie directly to the perf
tooling.
Christoph Hellwig h...@infradead.org writes:
[...] But as with so many tracing bits in the kernel it's just
lowlevel bits without a good user interface. We'd really need some
high-level way for sysadmins/developers to use it. E.g. a version
of the systemtap compiler that doesn't build a
Peter Teoh htmldevelo...@gmail.com writes:
I got a mid-way hang while installing OpenSolaris on KVM guest yesterday.
[...]
How can i debug via kvmtrace (or systemtap) to find out at which point it
hanged? [...]
In recent kernels, kvm tracing is done by markers, which systemtap can
attach
Hi, Mathieu -
[...]
Currently, [my merge plan] looks like :
In Ingo's trees :
- Tracepoints, scheduler tracepoints instrumentation, ftrace port to
tracepoints
- Should make it into 2.6.27 since ftrace needs those.
[...]
This is the tracepoints infrastructure, and ...
Short-term
Avi Kivity [EMAIL PROTECTED] writes:
[...]
kvm tracepoints are heavily tied into the implementation; and making
them harder to write means we will have less information. In fact, I
am contemplating moving in another direction (when looking at the
pgprintk()s scattered around
Avi Kivity [EMAIL PROTECTED] writes:
[...]
Have you considered using trace_mark() directly - eliminating the
KVM_TRACEN() middlemen?
[...]
Using trace_mark() directly -- looking at it, seems to fit the
requirements exactly. Should have looked at it earlier. Is there a
way to get a list
17 matches
Mail list logo
