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Re: [Qemu-devel] [PATCH v7 0/4] trace: Show vCPU info in guest code even
From: |
Alex Bennée |
Subject: |
Re: [Qemu-devel] [PATCH v7 0/4] trace: Show vCPU info in guest code events |
Date: |
Mon, 22 Feb 2016 20:15:52 +0000 |
User-agent: |
mu4e 0.9.17; emacs 25.0.91.9 |
Lluís Vilanova <address@hidden> writes:
> Lluís Vilanova writes:
>
>> NOTE: This series should complete the framework for guest code tracing. From
>> here on, other series can concurrently add actual events and improve
>> the
>> guest code tracing features and performance (e.g., control tracing
>> independently on each vCPU).
>
>> This series introduces the "vcpu" property for tracing events. This property
>> identifies events that are tied to a particular virtual CPU (e.g., executing
>> an
>> instruction).
>
>> Events with this property have an implicit vcpu argument, which is shown in
>> the
>> trace. In the case of events executed at TCG translation time, two implicit
>> arguments are added:
>
>> * The vCPU performing the code translation (shown in the translation-time
>> trace)
>> * The vCPU executing the translated code (shown in the execution-time trace)
>
>> Note that the "vcpu" and "tcg" properties are not merged into a single one,
>> since events can be defined that relate to a vCPU but are never raised from
>> TCG
>> code (e.g., interrupts).
>
> Hi,
>
> I guess it's been a hectic time to integrate patches, but I haven't received a
> comment on the tracing part since v4. If possible, I'd like to send an actual
> guest code event (vmem accesses) before the soft-freeze (once this series is
> accepted).
I don't see a reason you couldn't post a v8 of this series including the
actual use. It would help to see it being used in the wild and the
maintainer doesn't have to accept the whole series straight away.
>
>
> Cheers,
> Lluis
>
>
>> Changes in v7
>> =============
>
>> * Fix the modified event copying code.
>> * Minor fix in commit message for patch 3.
>
>
>> Changes in v6
>> =============
>
>> * Rebase on 84c0781.
>> * Replace the added 'TCGv_cpu' type for 'TCGv_env', since the users are
>> really
>> pointing to 'CPUArchState'.
>> * Add functions to simplify event argument management.
>> * Add minor event copy cleanup (remove long "event.original.original"
>> chains).
>> * Make it easier to change arguments injected by the 'vcpu' property.
>
>
>> Changes in v5
>> =============
>
>> * Rebase on 357e81c.
>> * Split from the previous (larger and more complex) v4 series.
Ahh I see it used to be. Perhaps maybe point to a public tree with the
example use?
>
>
>> Changes in v4
>> =============
>
>> * Fix typo in commit message (Stefan Hajnoczi).
>> * Simplify per-vCPU tracing state initialization (Stefan Hajnoczi).
>> * Update copyright years.
>
>
>> Changes in v3
>> =============
>
>> * Update QAPI version (Eric Blake).
>> * Fix '#optional' annotation in QAPI (Eric Blake).
>
>
>> Changes in v2
>> =============
>
>> * Rebase on 5522a84.
>> * Improve patch descriptions.
>> * Refactor code generation into a separate patch.
>> * Fix forward declarations (Stefan Hajnoczi & Eduardo Habkost).
>> * Fix "since" tags in QAPI interface (Eric Blake).
>> * Unify QAPI/QMP interface with an optional 'vcpu' argument (Eric Blake).
>> * Fix QMP+GTK header workaround (Stefan Hajnoczi).
>
>
>> Signed-off-by: Lluís Vilanova <address@hidden>
>> Acked-by: Stefan Hajnoczi <address@hidden>
>> ---
>
>> Lluís Vilanova (4):
>> trace: Extend API to manage event arguments
>> trace: Remove unnecessary intermediate event copies
>> tcg: Add type for vCPU pointers
>> trace: Add 'vcpu' event property to trace guest vCPU
>
>
>> docs/tracing.txt | 41 +++++++++++++
>> include/qemu/typedefs.h | 1
>> scripts/tracetool/__init__.py | 31 ++++++++--
>> scripts/tracetool/format/events_h.py | 4 +
>> scripts/tracetool/format/h.py | 3 +
>> scripts/tracetool/format/tcg_h.py | 33 +++++++----
>> scripts/tracetool/format/tcg_helper_c.py | 35 +++++++++--
>> scripts/tracetool/format/tcg_helper_h.py | 7 +-
>> scripts/tracetool/format/tcg_helper_wrapper_h.py | 5 +-
>> scripts/tracetool/format/ust_events_c.py | 1
>> scripts/tracetool/transform.py | 4 +
>> scripts/tracetool/vcpu.py | 69
>> ++++++++++++++++++++++
>> target-alpha/translate.c | 2 -
>> target-arm/translate.c | 2 -
>> target-arm/translate.h | 2 -
>> target-cris/translate.c | 2 -
>> target-i386/translate.c | 2 -
>> target-lm32/translate.c | 2 -
>> target-m68k/translate.c | 2 -
>> target-microblaze/translate.c | 2 -
>> target-mips/translate.c | 2 -
>> target-moxie/translate.c | 2 -
>> target-openrisc/translate.c | 2 -
>> target-ppc/translate.c | 2 -
>> target-s390x/translate.c | 2 -
>> target-sh4/translate.c | 2 -
>> target-sparc/translate.c | 5 +-
>> target-tilegx/translate.c | 2 -
>> target-tricore/translate.c | 2 -
>> target-unicore32/translate.c | 2 -
>> target-xtensa/translate.c | 2 -
>> tcg/tcg.h | 1
>> trace/control.h | 3 +
>> 33 files changed, 224 insertions(+), 55 deletions(-)
>> create mode 100644 scripts/tracetool/vcpu.py
>
>
>> To: address@hidden
>> Cc: Stefan Hajnoczi <address@hidden>
>> Cc: Eduardo Habkost <address@hidden>
>> Cc: Eric Blake <address@hidden>
>> Cc: Alex Bennée <address@hidden>
--
Alex Bennée
- [Qemu-devel] [PATCH v7 0/4] trace: Show vCPU info in guest code events, Lluís Vilanova, 2016/02/17
- [Qemu-devel] [PATCH v7 1/4] trace: Extend API to manage event arguments, Lluís Vilanova, 2016/02/17
- [Qemu-devel] [PATCH v7 2/4] trace: Remove unnecessary intermediate event copies, Lluís Vilanova, 2016/02/17
- [Qemu-devel] [PATCH v7 4/4] trace: Add 'vcpu' event property to trace guest vCPU, Lluís Vilanova, 2016/02/17
- [Qemu-devel] [PATCH v7 3/4] tcg: Add type for vCPU pointers, Lluís Vilanova, 2016/02/17
- Re: [Qemu-devel] [PATCH v7 0/4] trace: Show vCPU info in guest code events, Lluís Vilanova, 2016/02/22
- Re: [Qemu-devel] [PATCH v7 0/4] trace: Show vCPU info in guest code events,
Alex Bennée <=