ardour/ardour
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Tweak sched priorities use given and 4 levels below.

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This commit is contained in:
Robin Gareus 2021-06-10 14:37:50 +02:00
parent f37ad624f6
commit 7ce43739e8
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
6 changed files with 17 additions and 4 deletions
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12
libs/ardour/audioengine.cc
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@ -1155,8 +1155,20 @@ int
AudioEngine::client_real_time_priority ()
{
if (!_backend) {
assert (0);
return PBD_RT_PRI_PROC;
}
if (!_backend->is_realtime ()) {
/* this is only an issue with the Dummy backend.
* - with JACK, we require rt permissions.
* - with ALSA/Pulseaudio this can only happen if rt permissions
* are n/a. Other atempts to get rt will fail likewise.
*
* perhaps:
* TODO: use is_realtime () ? PBD_SCHED_FIFO : PBD_SCHED_OTHER
*/
return PBD_RT_PRI_PROC; // XXX
}
return _backend->client_real_time_priority();
}

2
libs/ardour/automation_watch.cc
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@ -189,7 +189,7 @@ AutomationWatch::timer ()
void
AutomationWatch::thread ()
{
pbd_set_thread_priority (pthread_self(), PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority() - 3);
pbd_set_thread_priority (pthread_self(), PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority() - 2);
pthread_set_name ("AutomationWatch");
while (_run_thread) {
Glib::usleep ((gulong) floor (Config->get_automation_interval_msecs() * 1000));

2
libs/ardour/convolver.cc
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@ -158,7 +158,7 @@ Convolution::restart ()
}
if (rv == 0) {
rv = _convproc.start_process (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance ()->client_real_time_priority () - 2), PBD_SCHED_FIFO);
rv = _convproc.start_process (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance ()->client_real_time_priority () - 1), PBD_SCHED_FIFO);
}
assert (rv == 0); // bail out in debug builds

2
libs/ardour/globals.cc
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@ -698,7 +698,7 @@ ARDOUR::init_post_engine (uint32_t start_cnt)
}
}
BaseUI::set_thread_priority (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 3));
BaseUI::set_thread_priority (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 2));
TransportMasterManager::instance ().restart ();
}

2
libs/ardour/lv2_plugin.cc
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@ -545,7 +545,7 @@ LV2Plugin::init(const void* c_plugin, samplecnt_t rate)
static const int32_t _min_block_length = 1; // may happen during split-cycles
static const int32_t _max_block_length = 8192; // max possible (with all engines and during export)
static const int32_t rt_policy = PBD_SCHED_FIFO;
static const int32_t rt_priority = pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 2);
static const int32_t rt_priority = pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority () - 1);
/* Consider updating max-block-size whenever the buffersize changes.
* It requires re-instantiating the plugin (which is a non-realtime operation),
* so it should be done lightly and only for plugins that require it.

1
libs/pbd/pthread_utils.cc
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@ -321,6 +321,7 @@ pbd_absolute_rt_priority (int policy, int priority)
const int p_max = sched_get_priority_max (policy); // Linux: 99
if (priority == 0) {
assert (0);
priority = (p_min + p_max) / 2;
} else if (priority > 0) {
/* value relative to minium */