From: Steven Rostedt <rostedt@goodmis.org>
To: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
Cc: linux-trace-devel@vger.kernel.org, Yordan Karadzhov <y.karadz@gmail.com>
Subject: Re: [PATCH 0/2] KernelShark2.0: Use libtracefs APIs to access tracefs
Date: Fri, 6 Mar 2020 15:13:56 -0500 [thread overview]
Message-ID: <20200306151356.4bbeef14@gandalf.local.home> (raw)
In-Reply-To: <20200306092902.48786-1-tz.stoyanov@gmail.com>
On Fri, 6 Mar 2020 11:29:00 +0200
"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com> wrote:
> From: "Tzvetomir (VMware) Stoyanov" <tz.stoyanov@gmail.com>
>
> The tracefs library provides APIs for accessing files from tracefs.
> The library is part of trace-cmd, it is installed as part of trace-cmd
> installation. KernelShark uses some of those APIs and must be linked with
> the library
>
> Tzvetomir (VMware) Stoyanov (2):
> KernelShark2.0: Link KernelShark to libtracefs
> KernelShark2.0: Use libtracefs APIs to access tracefs
>
I added these patches to the latest kernelshark-2.0 and it still doesn't
work for me. I did a little debugging, and noticed that it fails while
reading the guest trace.dat file with:
plugin "kvm_combo" failed to initialize on stream /tmp/trace-host-Fedora21.
It seems to require that the guest trace.dat file has kvm events?
Note, as I build my guest kernel with a make localmodconfig, which disables
all modules that are not necessary to boot the box, there is no kvm events
there. I can see why the host may need them, but not the guest. I'll
rebuild my guest kernel with kvm events and see if that solves this (but
that shouldn't be the case).
-- Steve
next prev parent reply other threads:[~2020-03-06 20:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-06 9:29 [PATCH 0/2] KernelShark2.0: Use libtracefs APIs to access tracefs Tzvetomir Stoyanov (VMware)
2020-03-06 9:29 ` [PATCH 1/2] KernelShark2.0: Link KernelShark to libtracefs Tzvetomir Stoyanov (VMware)
2020-03-06 9:29 ` [PATCH 2/2] KernelShark2.0: Use libtracefs APIs to access tracefs Tzvetomir Stoyanov (VMware)
2020-03-06 20:13 ` Steven Rostedt [this message]
2020-03-06 22:34 ` [PATCH 0/2] " Steven Rostedt
2020-03-09 9:17 ` Yordan Karadzhov (VMware)
2020-03-09 15:44 ` Steven Rostedt
2020-03-09 16:30 ` Steven Rostedt
2020-03-09 9:10 ` Yordan Karadzhov (VMware)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200306151356.4bbeef14@gandalf.local.home \
--to=rostedt@goodmis.org \
--cc=linux-trace-devel@vger.kernel.org \
--cc=tz.stoyanov@gmail.com \
--cc=y.karadz@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).