From: Nicolas Pitre <nicolas.pitre@linaro.org>
To: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linaro-kernel@lists.linaro.org
Subject: [PATCH 0/4] basic IPI tracing
Date: Fri, 18 Jul 2014 01:18:51 -0400 [thread overview]
Message-ID: <1405660735-13408-1-git-send-email-nicolas.pitre@linaro.org> (raw)
Part of the energy aware scheduler work is concerned by test and
measurement tools such as idlestat[1]. This relies on the ability to
trace wake-up events, mainly IRQs and IPIs.
While IRQs are already well instrumented with tracepoints, IPIs are rather
lacking on that front, and completely invisible on ARM.
This series defines generic IPI tracepoints and adds them to ARM and
ARM64. An attempt at adding them to X86 is also included for comments.
[1] https://wiki.linaro.org/WorkingGroups/PowerManagement/Resources/Tools/Idlestat
diffstat:
arch/arm/kernel/smp.c | 72 ++++++++++++++++++++------------
arch/arm64/kernel/smp.c | 67 +++++++++++++++++++-----------
arch/x86/kernel/smp.c | 16 ++++++++
include/trace/events/ipi.h | 89 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 192 insertions(+), 52 deletions(-)
next reply other threads:[~2014-07-18 5:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-18 5:18 Nicolas Pitre [this message]
2014-07-18 5:18 ` [PATCH 1/4] tracepoint: add generic tracepoint definitions for IPI tracing Nicolas Pitre
2014-07-23 13:24 ` Daniel Lezcano
2014-07-18 5:18 ` [PATCH 2/4] ARM: add IPI tracepoints Nicolas Pitre
2014-07-18 20:04 ` Steven Rostedt
2014-07-18 20:55 ` Nicolas Pitre
2014-07-18 21:22 ` Steven Rostedt
2014-07-19 2:55 ` Nicolas Pitre
2014-07-19 3:30 ` Steven Rostedt
2014-07-19 19:10 ` Ard Biesheuvel
2014-07-19 20:28 ` Steven Rostedt
2014-07-19 20:50 ` Ard Biesheuvel
2014-07-19 21:56 ` Steven Rostedt
2014-07-19 21:59 ` Nicolas Pitre
2014-07-23 22:18 ` Nicolas Pitre
2014-07-18 5:18 ` [PATCH 3/4] ARM64: " Nicolas Pitre
2014-07-21 10:36 ` Catalin Marinas
2014-07-18 5:18 ` [PATCH 4/4] (RFC) X86: " Nicolas Pitre
2014-07-18 20:27 ` Steven Rostedt
2014-07-18 20:59 ` Nicolas Pitre
2014-07-21 22:54 ` Steven Rostedt
2014-07-23 22:00 ` Nicolas Pitre
2014-07-20 20:25 ` Davidlohr Bueso
2014-07-21 22:35 ` Nicolas Pitre
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