diff mbox series

[V3,06/19] rtla: Real-Time Linux Analysis tool

Message ID 65fbb9b508a2c1803bacfe255c1d568eb8f4ba4f.1634574261.git.bristot@kernel.org (mailing list archive)
State Superseded
Headers show
Series RTLA: An interface for osnoise/timerlat tracers | expand

Commit Message

Daniel Bristot de Oliveira Oct. 18, 2021, 4:48 p.m. UTC
The rtla is a meta-tool that includes a set of commands that aims
to analyze the real-time properties of Linux. But instead of testing
Linux as a black box, rtla leverages kernel tracing capabilities to
provide precise information about the properties and root causes of
unexpected results.

rtla --help works and provide information about the available options.

This is just the "main" and the Makefile, no function yet.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: linux-rt-users@vger.kernel.org
Cc: linux-trace-devel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
---
 tools/tracing/rtla/Makefile   | 59 ++++++++++++++++++++++++++++
 tools/tracing/rtla/src/rtla.c | 72 +++++++++++++++++++++++++++++++++++
 2 files changed, 131 insertions(+)
 create mode 100644 tools/tracing/rtla/Makefile
 create mode 100644 tools/tracing/rtla/src/rtla.c

Comments

Ahmed S. Darwish Oct. 18, 2021, 7:30 p.m. UTC | #1
On Mon, Oct 18, 2021, Daniel Bristot de Oliveira wrote:
> --- /dev/null
> +++ b/tools/tracing/rtla/Makefile
> @@ -0,0 +1,59 @@
> +CC	:=	gcc

Some $(CROSS_COMPILE) for the poor souls who will integrate this into
embedded distributions?

> +
> +TRACEFS_HEADERS		:= $$(pkg-config --cflags libtracefs)
> +

ditto. This uses the host's pkg-config unconditionally.

Thanks,

--
Ahmed S. Darwish
Linutronix GmbH
Daniel Bristot de Oliveira Oct. 19, 2021, 8:06 a.m. UTC | #2
On 10/18/21 21:30, Ahmed S. Darwish wrote:
> On Mon, Oct 18, 2021, Daniel Bristot de Oliveira wrote:
>> --- /dev/null
>> +++ b/tools/tracing/rtla/Makefile
>> @@ -0,0 +1,59 @@
>> +CC	:=	gcc
> 
> Some $(CROSS_COMPILE) for the poor souls who will integrate this into
> embedded distributions?
> 
>> +
>> +TRACEFS_HEADERS		:= $$(pkg-config --cflags libtracefs)
>> +
> 
> ditto. This uses the host's pkg-config unconditionally.

mind trying this (on top of the current one)?

Thanks!

diff --git a/tools/tracing/rtla/Makefile b/tools/tracing/rtla/Makefile
index 9a914391e507..8c2b7f8c7f20 100644
--- a/tools/tracing/rtla/Makefile
+++ b/tools/tracing/rtla/Makefile
@@ -1,14 +1,30 @@
 NAME	:=	rtla
 VERSION	:=	0.1
 
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+  $(if $(or $(findstring environment,$(origin $(1))),\
+            $(findstring command line,$(origin $(1)))),,\
+    $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,PKG_CONFIG,pkg-config)
+$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
+$(call allow-override,LDCONFIG,ldconfig)
+
 INSTALL	=	install
-CC	:=	gcc
 FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
-		-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection
-MOPTS	:=	-m64 -mtune=generic
+		-fasynchronous-unwind-tables -fstack-clash-protection
 WOPTS	:= 	-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
 
-TRACEFS_HEADERS		:= $$(pkg-config --cflags libtracefs)
+TRACEFS_HEADERS	:= $$($(PKG_CONFIG) --cflags libtracefs)
 
 CFLAGS	:=	-O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(TRACEFS_HEADERS)
 LDFLAGS	:=	-ggdb
diff mbox series

Patch

diff --git a/tools/tracing/rtla/Makefile b/tools/tracing/rtla/Makefile
new file mode 100644
index 000000000000..b3ddd5138829
--- /dev/null
+++ b/tools/tracing/rtla/Makefile
@@ -0,0 +1,59 @@ 
+NAME	:=	rtla
+VERSION	:=	0.1
+
+INSTALL	=	install
+CC	:=	gcc
+FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
+		-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection
+MOPTS	:=	-m64 -mtune=generic
+WOPTS	:= 	-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
+
+TRACEFS_HEADERS		:= $$(pkg-config --cflags libtracefs)
+
+CFLAGS	:=	-O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(TRACEFS_HEADERS)
+LDFLAGS	:=	-ggdb
+LIBS	:=	-ltracefs -ltraceevent -lpthread -lprocps
+
+SRC	:=	$(wildcard src/*.c)
+HDR	:=	$(wildcard src/*.h)
+OBJ	:=	$(SRC:.c=.o)
+DIRS	:=	src
+FILES	:=	Makefile
+CEXT	:=	bz2
+TARBALL	:=	$(NAME)-$(VERSION).tar.$(CEXT)
+TAROPTS	:=	-cvjf $(TARBALL)
+BINDIR	:=	/usr/bin
+DATADIR	:=	/usr/share
+DOCDIR	:=	$(DATADIR)/doc
+MANDIR	:=	$(DATADIR)/man
+LICDIR	:=	$(DATADIR)/licenses
+
+.PHONY:	all tests
+
+all:	rtla
+
+rtla: $(OBJ)
+	$(CC) -o rtla $(LDFLAGS) $(OBJ) $(LIBS)
+
+static: $(OBJ)
+	$(CC) -o rtla-static $(LDFLAGS) --static $(OBJ) $(LIBS) -lpthread -ldl
+
+.PHONY: install
+install:
+	$(INSTALL) rtla -m 755 $(DESTDIR)$(BINDIR)
+	@test ! -f $(DESTDIR)$(BINDIR)/osnoise || rm $(DESTDIR)$(BINDIR)/osnoise
+	ln -s $(DESTDIR)$(BINDIR)/rtla $(DESTDIR)$(BINDIR)/osnoise
+
+.PHONY: clean tarball push
+clean:
+	@test ! -f rtla || rm rtla
+	@test ! -f rtla-static || rm rtla-static
+	@test ! -f src/rtla.o || rm src/rtla.o
+	@test ! -f $(TARBALL) || rm -f $(TARBALL)
+	@rm -rf *~ $(OBJ) *.tar.$(CEXT)
+
+tarball:  clean
+	rm -rf $(NAME)-$(VERSION) && mkdir $(NAME)-$(VERSION)
+	cp -r $(DIRS) $(FILES) $(NAME)-$(VERSION)
+	tar $(TAROPTS) --exclude='*~' $(NAME)-$(VERSION)
+	rm -rf $(NAME)-$(VERSION)
diff --git a/tools/tracing/rtla/src/rtla.c b/tools/tracing/rtla/src/rtla.c
new file mode 100644
index 000000000000..5ae2664ed47d
--- /dev/null
+++ b/tools/tracing/rtla/src/rtla.c
@@ -0,0 +1,72 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
+ */
+
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * rtla_usage - print rtla usage
+ */
+static void rtla_usage(void)
+{
+	int i;
+
+	static const char *msg[] = {
+		"",
+		"rtla version " VERSION,
+		"",
+		"  usage: rtla COMMAND ...",
+		"",
+		"  commands:",
+		"",
+		NULL,
+	};
+
+	for (i = 0; msg[i]; i++)
+		fprintf(stderr, "%s\n", msg[i]);
+	exit(1);
+}
+
+/*
+ * run_command - try to run a rtla tool command
+ *
+ * It returns 0 if it fails. The tool's main will generally not
+ * return as they should call exit().
+ */
+int run_command(int argc, char **argv, int start_position)
+{
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int retval;
+
+	/* is it an alias? */
+	retval = run_command(argc, argv, 0);
+	if (retval)
+		exit(0);
+
+	if (argc < 2)
+		goto usage;
+
+	if (strcmp(argv[1], "-h") == 0) {
+		rtla_usage();
+		exit(0);
+	} else if (strcmp(argv[1], "--help") == 0) {
+		rtla_usage();
+		exit(0);
+	}
+
+	retval = run_command(argc, argv, 1);
+	if (retval)
+		exit(0);
+
+usage:
+	rtla_usage();
+	exit(1);
+}