From: Ronnie Sahlberg <sahlberg@ronnie>
Date: Mon, 30 Jul 2007 00:50:35 +0000 (+1000)
Subject: add a small tool to compare rb tree with a timeval_compare()+add an
X-Git-Tag: tevent-0.9.20~348^2~2445^2~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=64f61364a7f8ffd56e9cac043a19e0a2c30e5a0d;p=thirdparty%2Fsamba.git

add a small tool to compare rb tree with a timeval_compare()+add an
entry to the end of the list DLIST (worst case insert)

(This used to be ctdb commit dcdf4a1f1c6675ae11ab26726c867d7782954fc6)
---

diff --git a/ctdb/tests/rb_perftest.c b/ctdb/tests/rb_perftest.c
new file mode 100644
index 00000000000..1760cd1149f
--- /dev/null
+++ b/ctdb/tests/rb_perftest.c
@@ -0,0 +1,123 @@
+/* 
+   simple rb vs dlist benchmark
+
+   Copyright (C) Ronnie Sahlberg 2007
+
+   This program 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; either version 3 of the License, or
+   (at your option) any later version.
+   
+   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; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "lib/events/events.h"
+#include "lib/util/dlinklist.h"
+#include "system/filesys.h"
+#include "popt.h"
+#include "cmdline.h"
+
+#include <sys/time.h>
+#include <time.h>
+#include "common/rb_tree.h"
+
+static struct timeval tp1,tp2;
+
+static void start_timer(void)
+{
+	gettimeofday(&tp1,NULL);
+}
+
+static double end_timer(void)
+{
+	gettimeofday(&tp2,NULL);
+	return (tp2.tv_sec + (tp2.tv_usec*1.0e-6)) - 
+		(tp1.tv_sec + (tp1.tv_usec*1.0e-6));
+}
+
+
+static int num_records = 1000;
+
+
+struct list_node {
+	struct list_node *prev, *next;
+};
+
+/*
+  main program
+*/
+int main(int argc, const char *argv[])
+{
+	struct poptOption popt_options[] = {
+		POPT_AUTOHELP
+		POPT_CTDB_CMDLINE
+		{ "num-records", 'r', POPT_ARG_INT, &num_records, 0, "num_records", "integer" },
+		POPT_TABLEEND
+	};
+	int opt;
+	const char **extra_argv;
+	int extra_argc = 0;
+	int ret;
+	poptContext pc;
+	struct event_context *ev;
+	double elapsed;
+	int i;
+	trbt_tree_t *tree;
+	struct list_node *list, *list_new, *list_head=NULL;
+
+	pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
+
+	while ((opt = poptGetNextOpt(pc)) != -1) {
+		switch (opt) {
+		default:
+			fprintf(stderr, "Invalid option %s: %s\n", 
+				poptBadOption(pc, 0), poptStrerror(opt));
+			exit(1);
+		}
+	}
+
+	/* setup the remaining options for the main program to use */
+	extra_argv = poptGetArgs(pc);
+	if (extra_argv) {
+		extra_argv++;
+		while (extra_argv[extra_argc]) extra_argc++;
+	}
+
+	ev = event_context_init(NULL);
+
+
+	printf("testing tree insert for %d records\n", num_records);
+	tree = trbt_create(NULL);
+	start_timer();
+	for (i=0;i<num_records;i++) {
+		trbt_insert32(tree, i, NULL);
+	}
+	elapsed=end_timer();
+	printf("%f seconds\n",(float)elapsed);
+
+
+	printf("testing dlist (worst case) add to tail for %d records\n", num_records);
+	list_new=talloc(NULL, struct list_node);
+	DLIST_ADD(list_head, list_new);
+	start_timer();
+	for (i=0;i<num_records;i++) {
+		for(list=list_head;list->next;list=list->next) {
+			/* the events code does a timeval_compare */
+			timeval_compare(&tp1, &tp2);
+		}
+
+		list_new=talloc(NULL, struct list_node);
+		DLIST_ADD_AFTER(list_head, list_new, list);
+	}
+	elapsed=end_timer();
+	printf("%f seconds\n",(float)elapsed);
+
+	return 0;
+}