cgroups: Cache controller masks and optimize queues.

1 files changed, 83 insertions, 0 deletions

diff --git a/src/test/test-cgroup-mask.c b/src/test/test-cgroup-mask.c
new file mode 100644
index 0000000000..ecf041f864
--- /dev/null
+++ b/src/test/test-cgroup-mask.c
@@ -0,0 +1,83 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 David Strauss
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <pwd.h>
+
+#include "manager.h"
+#include "unit.h"
+#include "util.h"
+#include "macro.h"
+#include "test-helper.h"
+
+static int test_cgroup_mask(void) {
+        Manager *m;
+        Unit *son, *daughter, *parent, *root;
+        FILE *serial = NULL;
+        FDSet *fdset = NULL;
+        int r;
+
+        /* Prepare the manager. */
+        assert_se(set_unit_path(TEST_DIR) >= 0);
+        r = manager_new(SYSTEMD_USER, false, &m);
+        if (r == -EPERM || r == -EACCES) {
+                puts("manager_new: Permission denied. Skipping test.");
+                return EXIT_TEST_SKIP;
+        }
+        assert(r >= 0);
+        assert_se(manager_startup(m, serial, fdset) >= 0);
+
+        /* Load units and verify hierarchy. */
+        assert_se(manager_load_unit(m, "parent.slice", NULL, NULL, &parent) >= 0);
+        assert_se(manager_load_unit(m, "son.service", NULL, NULL, &son) >= 0);
+        assert_se(manager_load_unit(m, "daughter.service", NULL, NULL, &daughter) >= 0);
+        assert(parent->load_state == UNIT_LOADED);
+        assert(son->load_state == UNIT_LOADED);
+        assert(daughter->load_state == UNIT_LOADED);
+        assert(UNIT_DEREF(son->slice) == parent);
+        assert(UNIT_DEREF(daughter->slice) == parent);
+        root = UNIT_DEREF(parent->slice);
+
+        /* Verify per-unit cgroups settings. */
+        assert(cgroup_context_get_mask(unit_get_cgroup_context(son)) == (CGROUP_CPU | CGROUP_CPUACCT));
+        assert(cgroup_context_get_mask(unit_get_cgroup_context(daughter)) == 0);
+        assert(cgroup_context_get_mask(unit_get_cgroup_context(parent)) == CGROUP_BLKIO);
+        assert(cgroup_context_get_mask(unit_get_cgroup_context(root)) == 0);
+
+        /* Verify aggregation of controller masks. */
+        assert(son->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT));
+        assert(daughter->cgroup_members_mask == 0);
+        assert(parent->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
+        assert(root->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
+
+        manager_free(m);
+
+        return 0;
+}
+
+int main(int argc, char* argv[]) {
+        int rc = 0;
+        TEST_REQ_RUNNING_SYSTEMD(rc = test_cgroup_mask());
+        return rc;
+}