From: stefanha@gmail.com (Stefan Hajnoczi)
Subject: [lttng-dev] [Qemu-devel] [PATCH 0/6] hypertrace: Lightweight guest-to-QEMU trace channel
Date: Thu, 18 Aug 2016 10:47:20 +0100 [thread overview]
Message-ID: <20160818094720.GA4850@stefanha-x1.localdomain> (raw)
In-Reply-To: <147041636348.2523.2954972609232949598.stgit@fimbulvetr.bsc.es>
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 4270 bytes --]
On Fri, Aug 05, 2016 at 06:59:23PM +0200, Lluís Vilanova wrote:
> The hypertrace channel allows guest code to emit events in QEMU (the host) using
> its tracing infrastructure (see "docs/trace.txt"). This works in both 'system'
> and 'user' modes. That is, hypertrace is to tracing, what hypercalls are to
> system calls.
>
> You can use this to emit an event on both guest and QEMU (host) traces to easily
> synchronize or correlate them. You could also modify you guest's tracing system
> to emit all events through the hypertrace channel, providing a unified and fully
> synchronized trace log. Another use case is timing the performance of guest code
> when optimizing TCG (QEMU traces have a timestamp).
>
> See first commit for a full description.
>
> Signed-off-by: Lluís Vilanova <vilanova at ac.upc.edu>
> ---
CCing Steven Rostedt, Masami Hiramatsu, Luiz Capitulino, and LTTng folks
who have all looked into host/guest tracing solutions.
Here is a mailing list archive link to this email thread:
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01081.html
>
> Lluís Vilanova (6):
> hypertrace: Add documentation
> hypertrace: Add tracing event "guest_hypertrace"
> hypertrace: [*-user] Add QEMU-side proxy to "guest_hypertrace" event
> hypertrace: [softmmu] Add QEMU-side proxy to "guest_hypertrace" event
> hypertrace: Add guest-side user-level library
> hypertrace: Add guest-side Linux module
>
>
> Makefile | 8 -
> Makefile.objs | 6
> bsd-user/main.c | 16 +
> bsd-user/mmap.c | 2
> bsd-user/syscall.c | 4
> configure | 42 +++
> docs/hypertrace.txt | 141 ++++++++++
> docs/tracing.txt | 3
> hypertrace/Makefile.objs | 20 +
> hypertrace/guest/linux-module/Kbuild.in | 5
> hypertrace/guest/linux-module/Makefile | 24 ++
> .../include/linux/qemu-hypertrace-internal.h | 46 +++
> .../linux-module/include/linux/qemu-hypertrace.h | 71 +++++
> hypertrace/guest/linux-module/qemu-hypertrace.c | 133 +++++++++
> hypertrace/guest/user/Makefile | 28 ++
> hypertrace/guest/user/common.c | 221 +++++++++++++++
> hypertrace/guest/user/qemu-hypertrace.h | 77 +++++
> hypertrace/softmmu.c | 243 +++++++++++++++++
> hypertrace/user.c | 292 ++++++++++++++++++++
> hypertrace/user.h | 52 ++++
> include/hw/pci/pci.h | 2
> linux-user/main.c | 19 +
> linux-user/mmap.c | 2
> linux-user/syscall.c | 3
> trace/Makefile.objs | 2
> 25 files changed, 1460 insertions(+), 2 deletions(-)
> create mode 100644 docs/hypertrace.txt
> create mode 100644 hypertrace/Makefile.objs
> create mode 100644 hypertrace/guest/linux-module/Kbuild.in
> create mode 100644 hypertrace/guest/linux-module/Makefile
> create mode 100644 hypertrace/guest/linux-module/include/linux/qemu-hypertrace-internal.h
> create mode 100644 hypertrace/guest/linux-module/include/linux/qemu-hypertrace.h
> create mode 100644 hypertrace/guest/linux-module/qemu-hypertrace.c
> create mode 100644 hypertrace/guest/user/Makefile
> create mode 100644 hypertrace/guest/user/common.c
> create mode 100644 hypertrace/guest/user/qemu-hypertrace.h
> create mode 100644 hypertrace/softmmu.c
> create mode 100644 hypertrace/user.c
> create mode 100644 hypertrace/user.h
>
>
> To: qemu-devel at nongnu.org
> Cc: Stefan Hajnoczi <stefanha at redhat.com>
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: not available
URL: <https://lists.lttng.org/pipermail/lttng-dev/attachments/20160818/ae62286f/attachment.sig>
next parent reply other threads:[~2016-08-18 9:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <147041636348.2523.2954972609232949598.stgit@fimbulvetr.bsc.es>
2016-08-18 9:47 ` Stefan Hajnoczi [this message]
2016-08-18 10:22 ` Lluís Vilanova
2016-08-18 13:53 ` Stefan Hajnoczi
2016-08-18 14:21 ` Luiz Capitulino
2016-08-21 12:17 ` Lluís Vilanova
2016-08-18 10:54 ` Stefan Hajnoczi
2016-08-18 13:37 ` Luiz Capitulino
2016-08-19 4:45 ` Masami Hiramatsu
2016-08-18 16:19 ` Steven Rostedt
2016-08-19 10:02 ` Stefan Hajnoczi
2016-08-19 13:30 ` Steven Rostedt
2016-08-21 12:32 ` Lluís Vilanova
2016-08-23 15:54 ` Stefan Hajnoczi
2016-08-24 10:25 ` Lluís Vilanova
2016-08-29 13:45 ` Stefan Hajnoczi
2016-08-29 18:46 ` Lluís Vilanova
2016-08-31 16:35 ` Stefan Hajnoczi
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=20160818094720.GA4850@stefanha-x1.localdomain \
--to=stefanha@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