varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2025-12-31 20:36:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

governor: always disable paranoid status

Browse Source 
This allows us to always attempt to disable the perf_event_paranoid
setting to -1 while we profile.
This commit is contained in:
Christian Hergert
2021-02-24 12:19:36 -08:00
parent 6d3398f258
commit 86fb061899
1 changed files with 72 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

148
src/libsysprof/sysprof-governor-source.c
View File

@ -117,6 +117,7 @@ static void
sysprof_governor_source_init (SysprofGovernorSource *self)
{
self->disable_governor = FALSE;
self->old_paranoid = 2;
}
SysprofSource *
@ -177,28 +178,6 @@ 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,
@ -218,14 +197,74 @@ disable_governor_cb (GObject *object,
else
self->old_governor = g_steal_pointer (&old_governor);
/* Now tweak paranoid setting */
sysprof_source_emit_ready (SYSPROF_SOURCE (self));
}
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;
if (!self->disable_governor)
sysprof_source_emit_ready (SYSPROF_SOURCE (self));
else
sysprof_helpers_set_governor_async (helpers,
"performance",
NULL,
disable_governor_cb,
g_steal_pointer (&self));
}
static void
sysprof_governor_source_prepare (SysprofSource *source)
{
SysprofGovernorSource *self = (SysprofGovernorSource *)source;
SysprofHelpers *helpers = sysprof_helpers_get_default ();
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
sysprof_helpers_set_paranoid_async (helpers,
-1,
NULL,
disable_paranoid_cb,
g_steal_pointer (&self));
g_object_ref (self));
}
static void
enable_governor_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
SysprofHelpers *helpers = (SysprofHelpers *)object;
g_autoptr(SysprofGovernorSource) self = user_data;
g_autoptr(GError) error = NULL;
g_autofree gchar *old_governor = NULL;
g_assert (SYSPROF_IS_HELPERS (helpers));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (!sysprof_helpers_set_governor_finish (helpers, result, &old_governor, &error))
g_warning ("Failed to change governor: %s", error->message);
g_clear_pointer (&self->old_governor, g_free);
sysprof_source_emit_finished (SYSPROF_SOURCE (self));
}
static void
enable_paranoid_cb (GObject *object,
@ -244,54 +283,14 @@ enable_paranoid_cb (GObject *object,
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
enable_governor_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
SysprofHelpers *helpers = (SysprofHelpers *)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));
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (!sysprof_helpers_set_governor_finish (helpers, result, &old_governor, &error))
g_warning ("Failed to change governor: %s", error->message);
g_clear_pointer (&self->old_governor, g_free);
/* Restore paranoid setting */
previous = self->old_paranoid;
sysprof_helpers_set_paranoid_async (helpers,
previous,
NULL,
enable_paranoid_cb,
g_steal_pointer (&self));
}
static void
sysprof_governor_source_prepare (SysprofSource *source)
{
SysprofGovernorSource *self = (SysprofGovernorSource *)source;
SysprofHelpers *helpers = sysprof_helpers_get_default ();
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (!self->disable_governor)
sysprof_source_emit_ready (source);
sysprof_source_emit_finished (SYSPROF_SOURCE (self));
else
sysprof_helpers_set_governor_async (helpers,
"performance",
self->old_governor,
NULL,
disable_governor_cb,
g_object_ref (self));
enable_governor_cb,
g_steal_pointer (&self));
}
static void
@ -302,14 +301,11 @@ sysprof_governor_source_stop (SysprofSource *source)
g_assert (SYSPROF_IS_GOVERNOR_SOURCE (self));
if (self->old_governor == NULL)
sysprof_source_emit_finished (source);
else
sysprof_helpers_set_governor_async (helpers,
self->old_governor,
NULL,
enable_governor_cb,
g_object_ref (self));
sysprof_helpers_set_paranoid_async (helpers,
self->old_paranoid,
NULL,
enable_paranoid_cb,
g_object_ref (self));
}
static void