From: Stefan Hajnoczi <stefanha@gmail.com>
To: "Lluís Vilanova" <vilanova@ac.upc.edu>
Cc: qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
lttng-dev@lists.lttng.org
Subject: Re: [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>
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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@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@nongnu.org
> Cc: Stefan Hajnoczi <stefanha@redhat.com>
>
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next prev parent reply other threads:[~2016-08-18 9:47 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-05 16:59 [Qemu-devel] [PATCH 0/6] hypertrace: Lightweight guest-to-QEMU trace channel Lluís Vilanova
2016-08-05 16:59 ` [Qemu-devel] [PATCH 1/6] hypertrace: Add documentation Lluís Vilanova
2016-08-05 17:17 ` Eric Blake
2016-08-08 13:02 ` Lluís Vilanova
2016-08-05 16:59 ` [Qemu-devel] [PATCH 2/6] hypertrace: Add tracing event "guest_hypertrace" Lluís Vilanova
2016-08-18 9:59 ` Stefan Hajnoczi
2016-08-18 10:32 ` Lluís Vilanova
2016-08-05 16:59 ` [Qemu-devel] [PATCH 3/6] hypertrace: [*-user] Add QEMU-side proxy to "guest_hypertrace" event Lluís Vilanova
2016-08-05 17:23 ` Eric Blake
2016-08-08 13:08 ` Lluís Vilanova
2016-08-18 10:17 ` Stefan Hajnoczi
2016-08-21 12:15 ` Lluís Vilanova
2016-08-23 15:52 ` Stefan Hajnoczi
2016-08-05 16:59 ` [Qemu-devel] [PATCH 4/6] hypertrace: [softmmu] " Lluís Vilanova
2016-08-05 16:59 ` [Qemu-devel] [PATCH 5/6] hypertrace: Add guest-side user-level library Lluís Vilanova
2016-08-05 16:59 ` [Qemu-devel] [PATCH 6/6] hypertrace: Add guest-side Linux module Lluís Vilanova
2016-08-18 9:47 ` Stefan Hajnoczi [this message]
2016-08-18 10:22 ` [Qemu-devel] [PATCH 0/6] hypertrace: Lightweight guest-to-QEMU trace channel 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
2016-09-05 14:37 ` Lluís Vilanova
2016-09-05 19:20 ` Masami Hiramatsu
2016-09-06 12:59 ` Lluís Vilanova
2016-09-13 13:52 ` Stefan Hajnoczi
2016-09-13 16:50 ` Lluís Vilanova
2016-09-05 14:59 ` Daniel P. Berrange
2016-09-05 18:29 ` Lluís Vilanova
2016-09-05 18:59 ` Daniel P. Berrange
2016-09-06 8:54 ` Lluís Vilanova
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