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module-rt: add option to disable rlimits/portal/rtkit

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This commit is contained in:
Wim Taymans 2023-07-04 11:11:48 +02:00
parent a373d7fde4
commit 4137ff656a
1 changed files with 39 additions and 7 deletions
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46
src/modules/module-rt.c
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@ -63,7 +63,8 @@
* This requires `RLIMIT_RTPRIO` to be set to a value that's equal to this
* module's `rt.prio` parameter or higher. Most distros will come with some
* package that configures this for certain groups or users. If this is not set
* up and DBus is available, then this module will fall back to using RTKit.
* up and DBus is available, then this module will fall back to using the Portal
* Realtime DBus API or RTKit.
*
* ## Module Options
*
@ -75,6 +76,9 @@
* consume without doing any blocking calls before the kernel kills
* the thread. This is a safety measure to avoid lockups of the complete
* system when some thread consumes 100%.
* - `rlimits.enabled`: enable the use of rtlimits, default true.
* - `rtportal.enabled`: enable the use of realtime portal, default true
* - `rtkit.enabled`: enable the use of rtkit, default true
* The nice level is by default set to an invalid value so that clients don't
* automatically have the nice level raised.
@ -91,6 +95,9 @@
* #rt.prio = 88
* #rt.time.soft = -1
* #rt.time.hard = -1
* #rlimits.enabled = true
* #rtportal.enabled = true
* #rtkit.enabled = true
* }
* flags = [ ifexists nofail ]
* }
@ -123,8 +130,11 @@ PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define MODULE_USAGE "( nice.level=<priority: default "SPA_STRINGIFY(DEFAULT_NICE_LEVEL)"(don't change)> ) " \
"( rt.prio=<priority: default "SPA_STRINGIFY(DEFAULT_RT_PRIO)"> ) " \
"( rt.time.soft=<in usec: default "SPA_STRINGIFY(DEFAULT_RT_TIME_SOFT)" ) " \
"( rt.time.hard=<in usec: default "SPA_STRINGIFY(DEFAULT_RT_TIME_HARD)" ) "
"( rt.time.soft=<in usec: default "SPA_STRINGIFY(DEFAULT_RT_TIME_SOFT)"> ) " \
"( rt.time.hard=<in usec: default "SPA_STRINGIFY(DEFAULT_RT_TIME_HARD)"> ) " \
"( rlimits.enabled=<default true> ) " \
"( rtportal.enabled=<default true> ) " \
"( rtkit.enabled=<default true> ) "
static const struct spa_dict_item module_props[] = {
{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
@ -170,6 +180,10 @@ struct impl {
struct spa_hook module_listener;
unsigned rlimits_enabled:1;
unsigned rtportal_enabled:1;
unsigned rtkit_enabled:1;
#ifdef HAVE_DBUS
bool use_rtkit;
/* For D-Bus. These are const static. */
@ -568,6 +582,9 @@ static bool check_realtime_privileges(struct impl *impl)
struct sched_param new_sched_params;
int try = 0;
if (!impl->rlimits_enabled)
return false;
while (try++ < 2) {
/* We could check `RLIMIT_RTPRIO`, but the BSDs generally don't have
* that available, and there are also other ways to use realtime
@ -643,10 +660,15 @@ static int set_nice(struct impl *impl, int nice_level, bool warn)
}
res = pw_rtkit_make_high_priority(impl, 0, nice_level);
}
else
else if (impl->rlimits_enabled)
res = sched_set_nice(nice_level);
else
res = -ENOTSUP;
#else
res = sched_set_nice(nice_level);
if (impl->rlimits_enabled)
res = sched_set_nice(nice_level);
else
res = -ENOTSUP;
#endif
if (res < 0) {
@ -993,6 +1015,9 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
impl->rt_prio = pw_properties_get_int32(props, "rt.prio", DEFAULT_RT_PRIO);
impl->rt_time_soft = pw_properties_get_int32(props, "rt.time.soft", DEFAULT_RT_TIME_SOFT);
impl->rt_time_hard = pw_properties_get_int32(props, "rt.time.hard", DEFAULT_RT_TIME_HARD);
impl->rlimits_enabled = pw_properties_get_bool(props, "rlimits.enabled", true);
impl->rtportal_enabled = pw_properties_get_bool(props, "rtportal.enabled", true);
impl->rtkit_enabled = pw_properties_get_bool(props, "rtkit.enabled", true);
bool can_use_rtkit = false, use_rtkit = false;
@ -1031,7 +1056,10 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
impl->use_rtkit = use_rtkit;
if (impl->use_rtkit) {
/* Checking xdg-desktop-portal. It works fine in all situations. */
impl->rtkit_bus = pw_rtkit_bus_get_session();
if (impl->rtportal_enabled)
impl->rtkit_bus = pw_rtkit_bus_get_session();
else
pw_log_info("Portal Realtime disabled");
if (impl->rtkit_bus != NULL) {
if (pw_rtkit_check_xdg_portal(impl->rtkit_bus)) {
impl->service_name = XDG_PORTAL_SERVICE_NAME;
@ -1045,7 +1073,11 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
}
/* Failed to get xdg-desktop-portal, try to use rtkit. */
if (impl->rtkit_bus == NULL) {
impl->rtkit_bus = pw_rtkit_bus_get_system();
if (impl->rtkit_enabled)
impl->rtkit_bus = pw_rtkit_bus_get_system();
else
pw_log_info("RTkit disabled");
if (impl->rtkit_bus != NULL) {
impl->service_name = RTKIT_SERVICE_NAME;
impl->object_path = RTKIT_OBJECT_PATH;