[LTP] [PATCH 1/4] ksm04: KSM for Memory Resource Controller and NUMA

[LTP] [PATCH 1/4] ksm04: KSM for Memory Resource Controller and NUMA

[CAI Qian]

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Signed-off-by: CAI Qian <caiqian@redhat.com>
---
 testcases/kernel/mem/ksm/ksm04.c |  142 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 142 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/mem/ksm/ksm04.c

diff --git a/testcases/kernel/mem/ksm/ksm04.c b/testcases/kernel/mem/ksm/ksm04.c
new file mode 100644
index 0000000..2ff3959
--- /dev/null
+++ b/testcases/kernel/mem/ksm/ksm04.c
@@ -0,0 +1,142 @@
+/*
+ * Kernel Samepage Merging (KSM) for Memory Resource Controller and NUMA
+ *
+ * Basic tests were to start several programs with same and different
+ * memory contents and ensure only to merge the ones with the same
+ * contents. When changed the content of one of merged pages in a
+ * process and to the mode "unmerging", it should discard all merged
+ * pages there. Also tested it is possible to disable KSM. There are
+ * also command-line options to specify the memory allocation size, and
+ * number of processes have same memory contents so it is possible to
+ * test more advanced things like KSM + OOM etc.
+ *
+ * Prerequisites:
+ *
+ * 1) ksm and ksmtuned daemons need to be disabled. Otherwise, it could
+ *    distrub the testing as they also change some ksm tunables depends
+ *    on current workloads.
+ *
+ * The test steps are:
+ * - Check ksm feature and backup current run setting.
+ * - Change run setting to 1 - merging.
+ * - 3 memory allocation programs have the memory contents that 2 of
+ *   them are all 'a' and one is all 'b'.
+ * - Check ksm statistics and verify the content.
+ * - 1 program changes the memory content from all 'a' to all 'b'.
+ * - Check ksm statistics and verify the content.
+ * - All programs change the memory content to all 'd'.
+ * - Check ksm statistics and verify the content.
+ * - Change one page of a process.
+ * - Check ksm statistics and verify the content.
+ * - Change run setting to 2 - unmerging.
+ * - Check ksm statistics and verify the content.
+ * - Change run setting to 0 - stop.
+ *
+ * Copyright (C) 2010  Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like.  Any license provided herein, whether
+ * implied or otherwise, applies only to this software file.  Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include "test.h"
+#include "usctest.h"
+#include "config.h"
+
+char *TCID = "ksm04";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+	&& HAVE_MPOL_CONSTANTS
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <numaif.h>
+#include "../include/mem.h"
+
+option_t ksm_options[] = {
+        { "n:", &opt_num,       &opt_numstr},
+        { "s:", &opt_size,      &opt_sizestr},
+        { "u:", &opt_unit,      &opt_unitstr},
+        { NULL, NULL,           NULL}
+};
+
+int main(int argc, char *argv[])
+{
+	int lc;
+	char *msg;
+	int size = 128, num = 3, unit = 1;
+	unsigned long nnodes = 1;
+	unsigned long nmask = 2;
+
+	msg = parse_opts(argc, argv, ksm_options, ksm_usage);
+	if (msg != NULL)
+		tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+
+	nnodes = count_numa();
+	if (count_numa() == 1)
+		tst_brkm(TCONF, tst_exit, "required a NUMA system.");
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		Tst_count = 0;
+		check_ksm_options(&size, &num, &unit);
+
+		write_memcg();
+
+		if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
+			tst_brkm(TBROK|TERRNO, cleanup, "set_mempolicy");
+		create_same_memory(size, num, unit);
+
+		write_cpusets();
+		create_same_memory(size, num, unit);
+	}
+	cleanup();
+}
+
+void cleanup(void)
+{
+	umount_mem(CPATH, CPATH_NEW);
+	umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
+	TEST_CLEANUP;
+	tst_exit();
+}
+
+void setup(void)
+{
+	tst_require_root(tst_exit);
+
+	tst_sig(FORK, DEF_HANDLER, cleanup);
+	TEST_PAUSE;
+	mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW);
+	mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
+}
+
+#else /* no NUMA */
+int main(void)
+{
+	tst_resm(TCONF, "no NUMA development packages installed.");
+	tst_exit();
+}
+#endif
-- 
1.7.3.2

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From 662bf7e71960138bc876dd58c06a3f3c4ff5941c Mon Sep 17 00:00:00 2001
From: CAI Qian <caiqian@redhat.com>
Date: Tue, 18 Jan 2011 11:10:02 +0800
Subject: [PATCH 1/4] ksm04: KSM for Memory Resource Controller and NUMA


Signed-off-by: CAI Qian <caiqian@redhat.com>
---
 testcases/kernel/mem/ksm/ksm04.c |  142 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 142 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/mem/ksm/ksm04.c

diff --git a/testcases/kernel/mem/ksm/ksm04.c b/testcases/kernel/mem/ksm/ksm04.c
new file mode 100644
index 0000000..2ff3959
--- /dev/null
+++ b/testcases/kernel/mem/ksm/ksm04.c
@@ -0,0 +1,142 @@
+/*
+ * Kernel Samepage Merging (KSM) for Memory Resource Controller and NUMA
+ *
+ * Basic tests were to start several programs with same and different
+ * memory contents and ensure only to merge the ones with the same
+ * contents. When changed the content of one of merged pages in a
+ * process and to the mode "unmerging", it should discard all merged
+ * pages there. Also tested it is possible to disable KSM. There are
+ * also command-line options to specify the memory allocation size, and
+ * number of processes have same memory contents so it is possible to
+ * test more advanced things like KSM + OOM etc.
+ *
+ * Prerequisites:
+ *
+ * 1) ksm and ksmtuned daemons need to be disabled. Otherwise, it could
+ *    distrub the testing as they also change some ksm tunables depends
+ *    on current workloads.
+ *
+ * The test steps are:
+ * - Check ksm feature and backup current run setting.
+ * - Change run setting to 1 - merging.
+ * - 3 memory allocation programs have the memory contents that 2 of
+ *   them are all 'a' and one is all 'b'.
+ * - Check ksm statistics and verify the content.
+ * - 1 program changes the memory content from all 'a' to all 'b'.
+ * - Check ksm statistics and verify the content.
+ * - All programs change the memory content to all 'd'.
+ * - Check ksm statistics and verify the content.
+ * - Change one page of a process.
+ * - Check ksm statistics and verify the content.
+ * - Change run setting to 2 - unmerging.
+ * - Check ksm statistics and verify the content.
+ * - Change run setting to 0 - stop.
+ *
+ * Copyright (C) 2010  Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like.  Any license provided herein, whether
+ * implied or otherwise, applies only to this software file.  Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include "test.h"
+#include "usctest.h"
+#include "config.h"
+
+char *TCID = "ksm04";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+	&& HAVE_MPOL_CONSTANTS
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <numaif.h>
+#include "../include/mem.h"
+
+option_t ksm_options[] = {
+        { "n:", &opt_num,       &opt_numstr},
+        { "s:", &opt_size,      &opt_sizestr},
+        { "u:", &opt_unit,      &opt_unitstr},
+        { NULL, NULL,           NULL}
+};
+
+int main(int argc, char *argv[])
+{
+	int lc;
+	char *msg;
+	int size = 128, num = 3, unit = 1;
+	unsigned long nnodes = 1;
+	unsigned long nmask = 2;
+
+	msg = parse_opts(argc, argv, ksm_options, ksm_usage);
+	if (msg != NULL)
+		tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+
+	nnodes = count_numa();
+	if (count_numa() == 1)
+		tst_brkm(TCONF, tst_exit, "required a NUMA system.");
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		Tst_count = 0;
+		check_ksm_options(&size, &num, &unit);
+
+		write_memcg();
+
+		if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
+			tst_brkm(TBROK|TERRNO, cleanup, "set_mempolicy");
+		create_same_memory(size, num, unit);
+
+		write_cpusets();
+		create_same_memory(size, num, unit);
+	}
+	cleanup();
+}
+
+void cleanup(void)
+{
+	umount_mem(CPATH, CPATH_NEW);
+	umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
+	TEST_CLEANUP;
+	tst_exit();
+}
+
+void setup(void)
+{
+	tst_require_root(tst_exit);
+
+	tst_sig(FORK, DEF_HANDLER, cleanup);
+	TEST_PAUSE;
+	mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW);
+	mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
+}
+
+#else /* no NUMA */
+int main(void)
+{
+	tst_resm(TCONF, "no NUMA development packages installed.");
+	tst_exit();
+}
+#endif
-- 
1.7.3.2


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