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Update gamemode-context.c

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added support for disabling the kernel split lock mitigation when entering game mode
This commit is contained in:
Henrik Holst 2023-12-04 19:50:57 +01:00 committed by afayaz-feral
parent b2bd7e5919
commit 9a7ee00bbf
1 changed files with 60 additions and 0 deletions
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60
daemon/gamemode-context.c
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@ -91,6 +91,8 @@ struct GameModeContext {
uint32_t last_cpu_energy_uj;
uint32_t last_igpu_energy_uj;
long initial_split_lock_mitigate;
/* Reaper control */
struct {
pthread_t thread;
@ -114,6 +116,7 @@ static void game_mode_context_enter(GameModeContext *self);
static void game_mode_context_leave(GameModeContext *self);
static char *game_mode_context_find_exe(pid_t pid);
static void game_mode_execute_scripts(char scripts[CONFIG_LIST_MAX][CONFIG_VALUE_MAX], int timeout);
static int game_mode_disable_splitlock(GameModeContext *self, bool disable);
static void start_reaper_thread(GameModeContext *self)
{
@ -151,6 +154,8 @@ void game_mode_context_init(GameModeContext *self)
/* Initialise the current CPU info */
game_mode_initialise_cpu(self->config, &self->cpu);
self->initial_split_lock_mitigate = -1;
pthread_rwlock_init(&self->rwlock, NULL);
/* Get the reaper thread going */
@ -202,6 +207,57 @@ void game_mode_context_destroy(GameModeContext *self)
pthread_rwlock_destroy(&self->rwlock);
}
static int game_mode_disable_splitlock(GameModeContext *self, bool disable)
{
if (!config_get_disable_splitlock(self->config))
return 0;
long value_num = self->initial_split_lock_mitigate;
char value_str[40];
if (disable) {
FILE *f = fopen("/proc/sys/kernel/split_lock_mitigate", "r");
if (f == NULL) {
if (errno == ENOENT)
return 0;
LOG_ERROR("Couldn't open /proc/sys/kernel/split_lock_mitigate : %s\n", strerror(errno));
return 1;
}
if (fgets(value_str, sizeof value_str, f) == NULL) {
LOG_ERROR("Couldn't read from /proc/sys/kernel/split_lock_mitigate : %s\n", strerror(errno));
fclose(f);
return 1;
}
self->initial_split_lock_mitigate = strtol (value_str, NULL, 10);
fclose(f);
value_num = 0;
if (self->initial_split_lock_mitigate == value_num)
return 0;
}
if (value_num == -1)
return 0;
sprintf(value_str, "%ld", value_num);
const char *const exec_args[] = {
"pkexec", LIBEXECDIR "/procsysctl", "split_lock_mitigate", value_str, NULL,
};
LOG_MSG("Requesting update of split_lock_mitigate to %s\n", value_str);
int ret = run_external_process(exec_args, NULL, -1);
if (ret != 0) {
LOG_ERROR("Failed to update split_lock_mitigate\n");
return ret;
}
return 0;
}
static int game_mode_set_governor(GameModeContext *self, enum GameModeGovernor gov)
{
if (self->current_govenor == gov) {
@ -369,6 +425,8 @@ static void game_mode_context_enter(GameModeContext *self)
if (config_get_inhibit_screensaver(self->config))
game_mode_inhibit_screensaver(true);
game_mode_disable_splitlock(self, true);
/* Apply GPU optimisations by first getting the current values, and then setting the target */
game_mode_get_gpu(self->stored_gpu);
game_mode_apply_gpu(self->target_gpu);
@ -404,6 +462,8 @@ static void game_mode_context_leave(GameModeContext *self)
if (config_get_inhibit_screensaver(self->config))
game_mode_inhibit_screensaver(false);
game_mode_disable_splitlock(self, false);
game_mode_set_governor(self, GAME_MODE_GOVERNOR_DEFAULT);
game_mode_disable_igpu_optimization(self);