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> [-- Attachment #1: Type: text/plain, Size: 4072 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@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> > [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 473 bytes --]
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From: Stefan Hajnoczi <stefanha@gmail.com> To: "Lluís Vilanova" <vilanova@ac.upc.edu> Cc: qemu-devel@nongnu.org, Steven Rostedt <rostedt@goodmis.org>, Luiz Capitulino <lcapitulino@redhat.com>, lttng-dev@lists.lttng.org, Masami Hiramatsu <mhiramat@kernel.org>, Stefan Hajnoczi <stefanha@redhat.com> Subject: Re: [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> [-- Attachment #1: Type: text/plain, Size: 4072 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@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> > [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 473 bytes --]
next prev parent reply other threads:[~2016-08-18 9:47 UTC|newest] Thread overview: 68+ 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 9:47 ` [PATCH 0/6] hypertrace: Lightweight guest-to-QEMU trace channel Stefan Hajnoczi 2016-08-18 10:22 ` [Qemu-devel] " Lluís Vilanova 2016-08-18 13:53 ` Stefan Hajnoczi 2016-08-18 14:21 ` Luiz Capitulino 2016-08-21 12:17 ` Lluís Vilanova 2016-08-21 12:17 ` Lluís Vilanova 2016-08-18 14:21 ` Luiz Capitulino 2016-08-18 13:53 ` Stefan Hajnoczi 2016-08-18 10:22 ` Lluís Vilanova 2016-08-18 10:54 ` Stefan Hajnoczi 2016-08-18 10:54 ` Stefan Hajnoczi 2016-08-18 13:37 ` [Qemu-devel] " Luiz Capitulino 2016-08-19 4:45 ` Masami Hiramatsu 2016-08-19 4:45 ` Masami Hiramatsu 2016-08-18 13:37 ` [Qemu-devel] " Luiz Capitulino 2016-08-18 16:19 ` Steven Rostedt 2016-08-19 10:02 ` Stefan Hajnoczi 2016-08-19 13:30 ` Steven Rostedt 2016-08-19 13:30 ` Steven Rostedt 2016-08-19 10:02 ` Stefan Hajnoczi 2016-08-18 16:19 ` Steven Rostedt 2016-08-21 12:32 ` Lluís Vilanova 2016-08-23 15:54 ` Stefan Hajnoczi 2016-08-23 15:54 ` Stefan Hajnoczi 2016-08-24 10:25 ` Lluís Vilanova 2016-08-29 13:45 ` Stefan Hajnoczi 2016-08-29 13:45 ` Stefan Hajnoczi 2016-08-29 18:46 ` [Qemu-devel] " Lluís Vilanova 2016-08-29 18:46 ` Lluís Vilanova 2016-08-31 16:35 ` Stefan Hajnoczi 2016-08-31 16:35 ` Stefan Hajnoczi 2016-09-05 14:37 ` Lluís Vilanova 2016-09-05 14:37 ` Lluís Vilanova 2016-09-05 19:20 ` Masami Hiramatsu 2016-09-05 19:20 ` Masami Hiramatsu 2016-09-06 12:59 ` [Qemu-devel] " Lluís Vilanova 2016-09-06 12:59 ` Lluís Vilanova 2016-09-13 13:52 ` Stefan Hajnoczi 2016-09-13 13:52 ` Stefan Hajnoczi 2016-09-13 16:50 ` [Qemu-devel] " Lluís Vilanova 2016-09-13 16:50 ` Lluís Vilanova 2016-09-05 14:59 ` Daniel P. Berrange 2016-09-05 14:59 ` Daniel P. Berrange 2016-09-05 18:29 ` [Qemu-devel] " Lluís Vilanova 2016-09-05 18:59 ` Daniel P. Berrange 2016-09-06 8:54 ` Lluís Vilanova 2016-09-06 8:54 ` Lluís Vilanova 2016-09-05 18:59 ` Daniel P. Berrange 2016-09-05 18:29 ` Lluís Vilanova 2016-08-24 10:25 ` Lluís Vilanova 2016-08-21 12:32 ` Lluís Vilanova
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