Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752826AbZKNGan (ORCPT ); Sat, 14 Nov 2009 01:30:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752328AbZKNGan (ORCPT ); Sat, 14 Nov 2009 01:30:43 -0500 Received: from mail-pz0-f171.google.com ([209.85.222.171]:63188 "EHLO mail-pz0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752165AbZKNGam (ORCPT ); Sat, 14 Nov 2009 01:30:42 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=fd5P7hNpDnZkeoH0yfJvQtFN+kRiSrr0+79E8aAGetBlh+uwaPkW6XYJubOQpADJ/Z si5XcvGoEc3/ZiWrnORz4kIxxfDfANKQzPrCR4WUDg59aSd0TAL6N0PeKoV7xnHLgQgf LQSSnFdcdojaI154WKa3K522wUHHHxeAI7JmE= From: Wu Zhangjin To: rostedt@goodmis.org, Ralf Baechle Cc: Wu Zhangjin , Frederic Weisbecker , Ingo Molnar , Nicholas Mc Guire , David Daney , Richard Sandiford , Patrik Kluba , Thomas Gleixner , Michal Simek , "Maciej W . Rozycki" , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, zhangfx@lemote.com, zhouqg@gmail.com Subject: [PATCH v8 00/16] ftrace for MIPS Date: Sat, 14 Nov 2009 14:30:31 +0800 Message-Id: X-Mailer: git-send-email 1.6.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4652 Lines: 105 From: Wu Zhangjin This patchset adds ftrace support for MIPS, including static ftracer, dynamic ftracer and function graph tracer, and also, a MIPS specific trace_clock_local() function is added to get high precision timestamp. Differ from the v7, This v8 revision incoporates the feedbacks from David, Ralf and Maciej. thanks goes to them. o Remove the needless -mlong-calls introduced in the old "tracing: add static function tracer support for MIPS" static ftracer already support module tracing for there is an existing -mlong-calls for modules in arch/mips/Makefile: MODFLAGS += -mlong-calls o Make dynamic ftracer work without -mlong-calls. Now, we need to consider the kernel and module respectively, the kernel part is without -mlong-calls, the module part is with -mlong-calls. In scripts/recordmcount.pl, we need to get the right offset, and in arch/mips/kernel/ftrace.c, we need to replace the right instruction in ftrace_make_nop() & ftrace_make_call(). And what I must mention here: I. we will not really get the offset of calling to _mcount in scripts/recordmcount.pl for the modules with -mlong-calls, we get the offset of "lui,v1,hi16_mcount". II. and in the ftrace_make_nop(), we not really replace the instruction by a nop, but by a "b 1f" instead. so, ftrace_make_nop not mean its original meaning. o Make function graph tracer work without -mlong-calls 'Cause -pg with and without -mlong-calls generate different number of instructions, we need to consider this and move the searching pointer to the right position in ftrace_get_parent_addr(). All of the updates have been tested with gcc-4.4/binutils-2.19.1 and gcc-4.5(including David's mcount-ra-address)/binutils-2.20 on a YeeLoong netbook. and the source code have been pushed into: git://dev.lemote.com/rt4ls.git linux-mips/dev/ftrace-upstream BTW: What about this revision? Hope it is the last revision from me, but I can not promise for the kernel developers are always "rigorous": they need the best solution ;) So, more feedbacks are welcome! Thanks & Regards, Wu Zhangjin Wu Zhangjin (16): tracing: convert trace_clock_local() as weak function tracing: add mips_timecounter_read() for MIPS tracing: add MIPS specific trace_clock_local() tracing: add static function tracer support for MIPS tracing: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST for MIPS tracing: add an endian argument to scripts/recordmcount.pl tracing: add dynamic function tracer support for MIPS tracing: add IRQENTRY_EXIT section for MIPS tracing: define a new __time_notrace annotation flag tracing: not trace the timecounter_read* in kernel/time/clocksource.c tracing: not trace mips_timecounter_read() for MIPS tracing: add function graph tracer support for MIPS tracing: add dynamic function graph tracer for MIPS tracing: make ftrace for MIPS work without -fno-omit-frame-pointer tracing: reserve $12(t0) for mcount-ra-address of gcc 4.5 tracing: make function graph tracer work with -mmcount-ra-address arch/mips/Kconfig | 5 + arch/mips/Makefile | 9 ++ arch/mips/include/asm/ftrace.h | 97 ++++++++++++++- arch/mips/include/asm/irq.h | 29 +---- arch/mips/include/asm/time.h | 20 +++ arch/mips/kernel/Makefile | 9 ++ arch/mips/kernel/csrc-r4k.c | 42 ++++++ arch/mips/kernel/ftrace.c | 275 ++++++++++++++++++++++++++++++++++++++++ arch/mips/kernel/irq.c | 30 +++++ arch/mips/kernel/mcount.S | 189 +++++++++++++++++++++++++++ arch/mips/kernel/mips_ksyms.c | 5 + arch/mips/kernel/smp.c | 3 +- arch/mips/kernel/smtc.c | 21 ++- arch/mips/kernel/time.c | 2 + arch/mips/kernel/trace_clock.c | 33 +++++ arch/mips/kernel/vmlinux.lds.S | 1 + arch/mips/sgi-ip22/ip22-int.c | 3 +- arch/mips/sgi-ip22/ip22-time.c | 3 +- include/linux/ftrace.h | 12 ++ kernel/time/clocksource.c | 5 +- kernel/trace/trace_clock.c | 2 +- scripts/Makefile.build | 1 + scripts/recordmcount.pl | 60 ++++++++- 23 files changed, 812 insertions(+), 44 deletions(-) create mode 100644 arch/mips/kernel/ftrace.c create mode 100644 arch/mips/kernel/mcount.S create mode 100644 arch/mips/kernel/trace_clock.c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/