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-rw-r--r--.gitignore1
-rw-r--r--Makefile.am25
-rw-r--r--man/systemd.exec.xml14
-rw-r--r--src/core/load-fragment.c18
-rw-r--r--src/test/test-sched-prio.c86
-rw-r--r--test/sched_idle_bad.service6
-rw-r--r--test/sched_idle_ok.service6
-rw-r--r--test/sched_rr_bad.service8
-rw-r--r--test/sched_rr_change.service9
-rw-r--r--test/sched_rr_ok.service6
10 files changed, 168 insertions, 11 deletions
diff --git a/.gitignore b/.gitignore
index 18e4e23c50..3fbd83e0e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,6 +90,7 @@
/systemd
/test-engine
/test-job-type
+/test-sched-prio
/systemctl
/systemadm
.dirstamp
diff --git a/Makefile.am b/Makefile.am
index da3885dbe7..42fed59641 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1185,7 +1185,8 @@ noinst_PROGRAMS += \
test-unit-file \
test-date \
test-sleep \
- test-replace-var
+ test-replace-var \
+ test-sched-prio
TESTS += \
test-job-type \
@@ -1195,7 +1196,15 @@ TESTS += \
test-unit-file \
test-date \
test-sleep \
- test-replace-var
+ test-replace-var \
+ test-sched-prio
+
+EXTRA_DIST += \
+ test/sched_idle_bad.service \
+ test/sched_idle_ok.service \
+ test/sched_rr_bad.service \
+ test/sched_rr_ok.service \
+ test/sched_rr_change.service
test_engine_SOURCES = \
src/test/test-engine.c
@@ -1323,6 +1332,18 @@ test_watchdog_SOURCES = \
test_watchdog_LDADD = \
libsystemd-shared.la
+test_sched_prio_SOURCES = \
+ src/test/test-sched-prio.c
+
+test_sched_prio_CFLAGS = \
+ $(AM_CFLAGS) \
+ $(DBUS_CFLAGS) \
+ -D"STR(s)=\#s" -D"TEST_DIR=STR($(abs_top_srcdir)/test/)"
+
+test_sched_prio_LDADD = \
+ libsystemd-core.la \
+ libsystemd-daemon.la
+
# ------------------------------------------------------------------------------
systemd_initctl_SOURCES = \
src/initctl/initctl.c
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 7b6514375d..b684bfbe5c 100644
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -214,13 +214,15 @@
<listitem><para>Sets the CPU
scheduling priority for executed
- processes. Takes an integer between 1
- (lowest priority) and 99 (highest
- priority). The available priority
+ processes. The available priority
range depends on the selected CPU
- scheduling policy (see above). See
- <citerefentry><refentrytitle>sched_setscheduler</refentrytitle><manvolnum>2</manvolnum></citerefentry>
- for details.</para></listitem>
+ scheduling policy (see above). For
+ real-time scheduling policies an
+ integer between 1 (lowest priority)
+ and 99 (highest priority) can be used.
+ See <citerefentry><refentrytitle>sched_setscheduler</refentrytitle><manvolnum>2</manvolnum></citerefentry>
+ for details.
+ </para></listitem>
</varlistentry>
<varlistentry>
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index b99e70e05a..6759255984 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -4,6 +4,7 @@
This file is part of systemd.
Copyright 2010 Lennart Poettering
+ Copyright 2012 Holger Hans Peter Freyther
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
@@ -689,6 +690,8 @@ int config_parse_exec_cpu_sched_policy(
}
c->cpu_sched_policy = x;
+ /* Moving to or from real-time policy? We need to adjust the priority */
+ c->cpu_sched_priority = CLAMP(c->cpu_sched_priority, sched_get_priority_min(x), sched_get_priority_max(x));
c->cpu_sched_set = true;
return 0;
@@ -705,19 +708,28 @@ int config_parse_exec_cpu_sched_prio(
void *userdata) {
ExecContext *c = data;
- int i;
+ int i, min, max;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
- /* On Linux RR/FIFO have the same range */
- if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
+ if (safe_atoi(rvalue, &i) < 0) {
log_error("[%s:%u] Failed to parse CPU scheduling priority, ignoring: %s", filename, line, rvalue);
return 0;
}
+
+ /* On Linux RR/FIFO range from 1 to 99 and OTHER/BATCH may only be 0 */
+ min = sched_get_priority_min(c->cpu_sched_policy);
+ max = sched_get_priority_max(c->cpu_sched_policy);
+
+ if (i < min || i > max) {
+ log_error("[%s:%u] CPU scheduling priority is out of range, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
c->cpu_sched_priority = i;
c->cpu_sched_set = true;
diff --git a/src/test/test-sched-prio.c b/src/test/test-sched-prio.c
new file mode 100644
index 0000000000..29235e8347
--- /dev/null
+++ b/src/test/test-sched-prio.c
@@ -0,0 +1,86 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Holger Hans Peter Freyther
+
+ 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 <sched.h>
+
+#include "manager.h"
+
+
+int main(int argc, char *argv[]) {
+ Manager *m;
+ Unit *idle_ok, *idle_bad, *rr_ok, *rr_bad, *rr_sched;
+ Service *ser;
+ FILE *serial = NULL;
+ FDSet *fdset = NULL;
+
+ /* prepare the test */
+ assert_se(set_unit_path(TEST_DIR) >= 0);
+ assert_se(manager_new(SYSTEMD_SYSTEM, &m) >= 0);
+ assert_se(manager_startup(m, serial, fdset) >= 0);
+
+ /* load idle ok */
+ assert_se(manager_load_unit(m, "sched_idle_ok.service", NULL, NULL, &idle_ok) >= 0);
+ assert_se(idle_ok->load_state == UNIT_LOADED);
+ ser = SERVICE(idle_ok);
+ assert_se(ser->exec_context.cpu_sched_policy == SCHED_OTHER);
+ assert_se(ser->exec_context.cpu_sched_priority == 0);
+
+ /*
+ * load idle bad. This should print a warning but we have no way to look at it.
+ */
+ assert_se(manager_load_unit(m, "sched_idle_bad.service", NULL, NULL, &idle_bad) >= 0);
+ assert_se(idle_bad->load_state == UNIT_LOADED);
+ ser = SERVICE(idle_ok);
+ assert_se(ser->exec_context.cpu_sched_policy == SCHED_OTHER);
+ assert_se(ser->exec_context.cpu_sched_priority == 0);
+
+ /*
+ * load rr ok.
+ * Test that the default priority is moving from 0 to 1.
+ */
+ assert_se(manager_load_unit(m, "sched_rr_ok.service", NULL, NULL, &rr_ok) >= 0);
+ assert_se(rr_ok->load_state == UNIT_LOADED);
+ ser = SERVICE(rr_ok);
+ assert_se(ser->exec_context.cpu_sched_policy == SCHED_RR);
+ assert_se(ser->exec_context.cpu_sched_priority == 1);
+
+ /*
+ * load rr bad.
+ * Test that the value of 0 and 100 is ignored.
+ */
+ assert_se(manager_load_unit(m, "sched_rr_bad.service", NULL, NULL, &rr_bad) >= 0);
+ assert_se(rr_bad->load_state == UNIT_LOADED);
+ ser = SERVICE(rr_bad);
+ assert_se(ser->exec_context.cpu_sched_policy == SCHED_RR);
+ assert_se(ser->exec_context.cpu_sched_priority == 1);
+
+ /*
+ * load rr change.
+ * Test that anything between 1 and 99 can be set.
+ */
+ assert_se(manager_load_unit(m, "sched_rr_change.service", NULL, NULL, &rr_sched) >= 0);
+ assert_se(rr_sched->load_state == UNIT_LOADED);
+ ser = SERVICE(rr_sched);
+ assert_se(ser->exec_context.cpu_sched_policy == SCHED_RR);
+ assert_se(ser->exec_context.cpu_sched_priority == 99);
+
+ return 0;
+}
diff --git a/test/sched_idle_bad.service b/test/sched_idle_bad.service
new file mode 100644
index 0000000000..589a87ccfd
--- /dev/null
+++ b/test/sched_idle_bad.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Bad sched priority for Idle
+
+[Service]
+ExecStart=/bin/true
+CPUSchedulingPriority=1
diff --git a/test/sched_idle_ok.service b/test/sched_idle_ok.service
new file mode 100644
index 0000000000..262ef3e319
--- /dev/null
+++ b/test/sched_idle_ok.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Sched idle with prio 0
+
+[Service]
+ExecStart=/bin/true
+CPUSchedulingPriority=0
diff --git a/test/sched_rr_bad.service b/test/sched_rr_bad.service
new file mode 100644
index 0000000000..0be534a546
--- /dev/null
+++ b/test/sched_rr_bad.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Bad sched priority for RR
+
+[Service]
+ExecStart=/bin/true
+CPUSchedulingPolicy=rr
+CPUSchedulingPriority=0
+CPUSchedulingPriority=100
diff --git a/test/sched_rr_change.service b/test/sched_rr_change.service
new file mode 100644
index 0000000000..b3e3a000f8
--- /dev/null
+++ b/test/sched_rr_change.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Change prio
+
+[Service]
+ExecStart=/bin/true
+CPUSchedulingPolicy=rr
+CPUSchedulingPriority=1
+CPUSchedulingPriority=2
+CPUSchedulingPriority=99
diff --git a/test/sched_rr_ok.service b/test/sched_rr_ok.service
new file mode 100644
index 0000000000..b88adc5434
--- /dev/null
+++ b/test/sched_rr_ok.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Default prio for RR
+
+[Service]
+ExecStart=/bin/true
+CPUSchedulingPolicy=rr
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-06 19:19:51 +0000