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From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: linux-kernel@vger.kernel.org, paulus@samba.org,
	Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@redhat.com>,
	Greg Kroah-Hartman <gregkh@suse.de>,
	Christoph Hellwig <hch@infradead.org>
Cc: ltt-dev@shafik.org, systemtap@sources.redhat.com,
	linuxppc-dev@ozlabs.org, Douglas Niehaus <niehaus@eecs.ku.edu>,
	"Martin J. Bligh" <mbligh@mbligh.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 4/4] Linux Kernel Markers : powerpc optimisation
Date: Wed, 20 Dec 2006 19:01:40 -0500	[thread overview]
Message-ID: <20061221000140.GE28643@Krystal> (raw)
In-Reply-To: <20061220235216.GA28643@Krystal>

This is the powerpc Linux Kernel Markers optimised version.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

--- /dev/null
+++ b/include/asm-powerpc/marker.h
@@ -0,0 +1,58 @@
+/*
+ * marker.h
+ *
+ * Code markup for dynamic and static tracing. PowerPC architecture
+ * optimisations.
+ *
+ * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * This file is released under the GPLv2.
+ * See the file COPYING for more details.
+ */
+
+#include <asm/asm-compat.h>
+
+struct __mark_marker_c {
+	const char *name;
+	marker_probe_func **call;
+	const char *format;
+} __attribute__((packed));
+
+struct __mark_marker {
+	struct __mark_marker_c *cmark;
+	volatile short *enable;
+} __attribute__((packed));
+
+#ifdef CONFIG_MARKERS
+
+#define MARK(name, format, args...) \
+	do { \
+		static marker_probe_func *__mark_call_##name = \
+					__mark_empty_function; \
+		static const struct __mark_marker_c __mark_c_##name \
+			__attribute__((section(".markers.c"))) = \
+			{ #name, &__mark_call_##name, format } ; \
+		char condition; \
+		asm volatile(	".section .markers, \"a\";\n\t" \
+					PPC_LONG "%1, 0f;\n\t" \
+					".previous;\n\t" \
+					".align 4\n\t" \
+					"0:\n\t" \
+					"li %0,0;\n\t" \
+				: "=r" (condition) \
+				: "i" (&__mark_c_##name)); \
+		__mark_check_format(format, ## args); \
+		if (unlikely(condition)) { \
+			preempt_disable(); \
+			(*__mark_call_##name)(format, ## args); \
+			preempt_enable_no_resched(); \
+		} \
+	} while (0)
+
+
+/* Offset of the immediate value from the start of the addi instruction (result
+ * of the li mnemonic), in bytes. */
+#define MARK_ENABLE_IMMEDIATE_OFFSET 2
+#define MARK_POLYMORPHIC
+
+#endif

OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 

  parent reply	other threads:[~2006-12-21  0:01 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-20 23:52 [PATCH 0/4] Linux Kernel Markers Mathieu Desnoyers
2006-12-20 23:57 ` [PATCH 1/4] Linux Kernel Markers : Architecture agnostic code Mathieu Desnoyers
2006-12-20 23:59 ` [PATCH 2/4] Linux Kernel Markers : kconfig menus Mathieu Desnoyers
2006-12-21  0:00 ` [PATCH 3/4] Linux Kernel Markers : i386 optimisation Mathieu Desnoyers
2006-12-21  0:01 ` Mathieu Desnoyers [this message]
2007-01-13  1:33 ` [PATCH 0/4] Linux Kernel Markers Richard J Moore
2007-01-13  5:45   ` Mathieu Desnoyers
2007-01-16 17:41     ` [PATCH 0/4 update] Linux Kernel Markers - i386 : pIII erratum 49 : XMC Mathieu Desnoyers
2007-01-16 18:35       ` Frank Ch. Eigler
2007-01-16 21:27       ` [PATCH 0/4 update] kprobes and traps Mathieu Desnoyers
2007-01-17 12:25         ` S. P. Prasanna
2007-01-16 17:56   ` [PATCH 1/2] lockdep missing barrier() Mathieu Desnoyers
2007-01-24  4:26     ` Andrew Morton
2007-01-24 16:51       ` Mathieu Desnoyers
2007-01-24 17:24         ` [PATCH] order of lockdep off/on in vprintk() should be changed Mathieu Desnoyers
2007-01-24 17:55           ` [PATCH] minimize lockdep_on/off side-effect Mathieu Desnoyers
2007-01-16 17:56   ` [PATCH 2/2] lockdep reentrancy Mathieu Desnoyers
2007-01-24  4:29     ` Andrew Morton
2007-01-24 16:55       ` Mathieu Desnoyers

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