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governor: disable paranoid setting in governor source

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This could be it's own source, but it's nice to have it in one place
with our performance tooling.
This commit is contained in:
Christian Hergert
2021-02-24 11:56:22 -08:00
parent 0abba0949d
commit 52e04cf346
1 changed files with 59 additions and 3 deletions
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62
src/libsysprof/sysprof-governor-source.c
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@ -29,6 +29,7 @@ struct _SysprofGovernorSource
{
GObject parent_instance;
gchar *old_governor;
int old_paranoid;
guint disable_governor : 1;
};
@ -108,7 +109,7 @@ sysprof_governor_source_class_init (SysprofGovernorSourceClass *klass)
"Disable Governor",
TRUE,
(G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
}
@ -176,6 +177,28 @@ sysprof_governor_source_deserialize (SysprofSource *source,
g_key_file_get_boolean (keyfile, group, "disable-governor", NULL));
}
static void
disable_paranoid_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
SysprofHelpers *helpers = (SysprofHelpers *)object;
g_autoptr(SysprofGovernorSource) self = user_data;
g_autoptr(GError) error = NULL;
int old_paranoid;
g_assert (SYSPROF_IS_HELPERS (helpers));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (!sysprof_helpers_set_paranoid_finish (helpers, result, &old_paranoid, &error))
g_warning ("Failed to change perf_event_paranoid: %s", error->message);
else
self->old_paranoid = old_paranoid;
sysprof_source_emit_ready (SYSPROF_SOURCE (self));
}
static void
disable_governor_cb (GObject *object,
GAsyncResult *result,
@ -195,7 +218,33 @@ disable_governor_cb (GObject *object,
else
self->old_governor = g_steal_pointer (&old_governor);
sysprof_source_emit_ready (SYSPROF_SOURCE (self));
/* Now tweak paranoid setting */
sysprof_helpers_set_paranoid_async (helpers,
-1,
NULL,
disable_paranoid_cb,
g_steal_pointer (&self));
}
static void
enable_paranoid_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
SysprofHelpers *helpers = (SysprofHelpers *)object;
g_autoptr(SysprofGovernorSource) self = user_data;
g_autoptr(GError) error = NULL;
int old_governor;
g_assert (SYSPROF_IS_HELPERS (helpers));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (!sysprof_helpers_set_paranoid_finish (helpers, result, &old_governor, &error))
g_warning ("Failed to change event_perf_paranoid: %s", error->message);
sysprof_source_emit_finished (SYSPROF_SOURCE (self));
}
static void
@ -207,6 +256,7 @@ enable_governor_cb (GObject *object,
g_autoptr(SysprofGovernorSource) self = user_data;
g_autoptr(GError) error = NULL;
g_autofree gchar *old_governor = NULL;
int previous;
g_assert (SYSPROF_IS_HELPERS (helpers));
g_assert (G_IS_ASYNC_RESULT (result));
@ -217,7 +267,13 @@ enable_governor_cb (GObject *object,
g_clear_pointer (&self->old_governor, g_free);
sysprof_source_emit_finished (SYSPROF_SOURCE (self));
/* Restore paranoid setting */
previous = self->old_paranoid;
sysprof_helpers_set_paranoid_async (helpers,
previous,
NULL,
enable_paranoid_cb,
g_steal_pointer (&self));
}
static void