File latencytop-incremental-output.patch of Package latencytop

From bb054222fc0b5ec11941bff8fd2c7e544bd9ddc8 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 10 Feb 2010 11:48:02 -0500
Subject: [PATCH] Add latencytop -c to dump process information to the console

This adds something similar to vmstat 1 to latencytop, where
it simply does a text dump of all the process latency information
to the console every 10 seconds.  Back traces are included in the
dump.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 src/Makefile     |    2 +-
 src/latencytop.c |   38 +++++++---
 src/latencytop.h |    1 +
 src/text_dump.c  |  199 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 227 insertions(+), 13 deletions(-)
 create mode 100644 src/text_dump.c

diff --git a/src/Makefile b/src/Makefile
index de24551..1ff9740 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -6,7 +6,7 @@ SBINDIR = /usr/sbin
 XCFLAGS = -W  -g `pkg-config --cflags glib-2.0` -D_FORTIFY_SOURCE=2 -Wno-sign-compare
 LDF = -Wl,--as-needed `pkg-config --libs glib-2.0`   -lncursesw 
 
-OBJS= latencytop.o text_display.o translate.o fsync.o
+OBJS= latencytop.o text_display.o text_dump.o translate.o fsync.o
 
 ifdef HAS_GTK_GUI
   XCFLAGS += `pkg-config --cflags gtk+-2.0` -DHAS_GTK_GUI
diff --git a/src/latencytop.c b/src/latencytop.c
index f516f53..fe252d0 100644
--- a/src/latencytop.c
+++ b/src/latencytop.c
@@ -111,6 +111,10 @@ static void fixup_reason(struct latency_line *line, char *c)
 		*(c2++) = 0;
 	} else
 		strncpy(line->reason, c2, 1024);
+
+	c2 = strchr(line->reason, '\n');
+	if (c2)
+		*c2=0;
 }
 
 void parse_global_list(void)
@@ -538,19 +542,13 @@ static void cleanup_sysctl(void)
 int main(int argc, char **argv)
 {
 	int i, use_gtk = 0;
+	int console_dump = 0;
 
 	enable_sysctl();
 	enable_fsync_tracer();
 	atexit(cleanup_sysctl);
 
-#ifdef HAS_GTK_GUI
-	if (preinitialize_gtk_ui(&argc, &argv))
-		use_gtk = 1;
-#endif
-	if (!use_gtk)
-		preinitialize_text_ui(&argc, &argv);
-
-	for (i = 1; i < argc; i++)		
+	for (i = 1; i < argc; i++) {
 		if (strcmp(argv[i],"-d") == 0) {
 			init_translations("latencytop.trans");
 			parse_global_list();
@@ -558,6 +556,17 @@ int main(int argc, char **argv)
 			dump_global_to_console();
 			return EXIT_SUCCESS;
 		}
+		if (strcmp(argv[i],"-c") == 0)
+			console_dump = 1;
+	}
+
+#ifdef HAS_GTK_GUI
+	if (!console_dump && preinitialize_gtk_ui(&argc, &argv))
+		use_gtk = 1;
+#endif
+	if (!console_dump && !use_gtk)
+		preinitialize_text_ui(&argc, &argv);
+
 	for (i = 1; i < argc; i++)
 		if (strcmp(argv[i], "--unknown") == 0) {
 			noui = 1;
@@ -579,12 +588,17 @@ int main(int argc, char **argv)
 		sleep(5);
 		fprintf(stderr, ".");
 	}
+
+	if (console_dump) {
+		start_text_dump();
+	} else {
 #ifdef HAS_GTK_GUI
-	if (use_gtk)
-		start_gtk_ui();
-	else
+		if (use_gtk)
+			start_gtk_ui();
+		else
 #endif
-		start_text_ui();
+			start_text_ui();
+	}
 
 	prune_unused_procs();
 	delete_list();
diff --git a/src/latencytop.h b/src/latencytop.h
index 79775ac..f3e0934 100644
--- a/src/latencytop.h
+++ b/src/latencytop.h
@@ -50,6 +50,7 @@ extern void start_gtk_ui(void);
 
 extern void preinitialize_text_ui(int *argc, char ***argv);
 extern void start_text_ui(void);
+extern void start_text_dump(void);
 
 extern char *translate(char *line);
 extern void init_translations(char *filename);
diff --git a/src/text_dump.c b/src/text_dump.c
new file mode 100644
index 0000000..76fc7b1
--- /dev/null
+++ b/src/text_dump.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2008, Intel Corporation
+ *
+ * This file is part of LatencyTOP
+ *
+ * This program file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program in a file named COPYING; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * 	Arjan van de Ven <arjan@linux.intel.com>
+ *	Chris Mason <chris.mason@oracle.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <dirent.h>
+#include <time.h>
+#include <wchar.h>
+#include <ctype.h>
+
+#include <glib.h>
+
+#include "latencytop.h"
+
+static GList *cursor_e = NULL;
+static int done = 0;
+
+static void print_global_list(void)
+{
+	GList *item;
+	struct latency_line *line;
+	int i = 1;
+
+	printf("Globals: Cause Maximum Percentage\n");
+	item = g_list_first(lines);
+	while (item && i < 10) {
+		line = item->data;
+		item = g_list_next(item);
+
+		if (line->max*0.001 < 0.1)
+			continue;
+		printf("%s", line->reason);
+		printf("\t%5.1f msec        %5.1f %%\n",
+				line->max * 0.001,
+				(line->time * 100 +0.0001) / total_time);
+		i++;
+	}
+}
+
+static void print_one_backtrace(char *trace)
+{
+	char *p;
+	int pos;
+	int after;
+	int tabs = 0;
+
+	if (!trace || !trace[0])
+		return;
+	pos = 16;
+	while(*trace && *trace == ' ')
+		trace++;
+
+	if (!trace[0])
+		return;
+
+	while(*trace) {
+		p = strchr(trace, ' ');
+		if (p) {
+			pos += p - trace + 1;
+			*p = '\0';
+		}
+		if (!tabs) {
+			/* we haven't printed anything yet */
+			printf("\t\t");
+			tabs = 1;
+		} else if (pos > 79) {
+			/*
+			 * we have printed something our line is going to be
+			 * long
+			 */
+			printf("\n\t\t");
+			pos = 16 + p - trace + 1;
+		}
+		printf("%s ", trace);
+		if (!p)
+			break;
+
+		trace = p + 1;
+		if (trace && pos > 70) {
+			printf("\n");
+			tabs = 0;
+			pos = 16;
+		}
+	}
+	printf("\n");
+}
+
+static void print_procs()
+{
+	struct process *proc;
+	GList *item;
+	double total;
+
+	printf("Process details:\n");
+	item = g_list_first(procs);
+	while (item) {
+		int printit = 0;
+		GList *item2;
+		struct latency_line *line;
+		proc = item->data;
+		item = g_list_next(item);
+
+		total = 0.0;
+
+		item2 = g_list_first(proc->latencies);
+		while (item2) {
+			line = item2->data;
+			item2 = g_list_next(item2);
+			total = total + line->time;
+		}
+		item2 = g_list_first(proc->latencies);
+		while (item2) {
+			char *p;
+			char *backtrace;
+			line = item2->data;
+			item2 = g_list_next(item2);
+			if (line->max*0.001 < 0.1)
+				continue;
+			if (!printit) {
+				printf("Process %s (%i) ", proc->name, proc->pid);
+				printf("Total: %5.1f msec\n", total*0.001);
+				printit = 1;
+			}
+			printf("\t%s", line->reason);
+			printf("\t%5.1f msec        %5.1f %%\n",
+				line->max * 0.001,
+				(line->time * 100 +0.0001) / total
+				);
+			print_one_backtrace(line->backtrace);
+		}
+
+	}
+}
+
+static int done_yet(int time, struct timeval *p1)
+{
+	int seconds;
+	int usecs;
+	struct timeval p2;
+	gettimeofday(&p2, NULL);
+	seconds = p2.tv_sec - p1->tv_sec;
+	usecs = p2.tv_usec - p1->tv_usec;
+
+	usecs += seconds * 1000000;
+	if (usecs > time * 1000000)
+		return 1;
+	return 0;
+}
+
+void signal_func(int foobie)
+{
+	done = 1;
+}
+
+void start_text_dump(void)
+{
+	struct timeval now;
+	struct tm *tm;
+	signal(SIGINT, signal_func);
+	signal(SIGTERM, signal_func);
+
+	while (!done) {
+		gettimeofday(&now, NULL);
+		printf("=============== %s", asctime(localtime(&now.tv_sec)));
+		update_list();
+		print_global_list();
+		print_procs();
+		if (done)
+			break;
+		sleep(10);
+	}
+}
+
-- 
1.6.5.2
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