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Merge pull request #84 from kakra/improve-scheduler-logging

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gamemode-scheduler: Improve logging
This commit is contained in:
Alex Smith
2018-10-08 17:30:06 +01:00
committed by GitHub
parent 3c0bc9ef5c 8a618a29fa
commit 9bbcc03c50
1 changed files with 43 additions and 11 deletions
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54
daemon/gamemode.c
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@ -210,15 +210,15 @@ void game_mode_context_destroy(GameModeContext *self)
*/
static void game_mode_apply_scheduler(GameModeContext *self, pid_t client)
{
LOG_MSG("Setting scheduling policies...\n");
/*
* read configuration "renice" (1..20)
*/
long int renice = 0;
config_get_renice_value(self->config, &renice);
if ((renice < 1) || (renice > 20)) {
LOG_ERROR("Renice value [%ld] defaulted to [%d].\n", renice, -NICE_DEFAULT_PRIORITY);
LOG_ERROR("Invalid renice value '%ld' reset to default: %d.\n",
renice,
-NICE_DEFAULT_PRIORITY);
renice = NICE_DEFAULT_PRIORITY;
} else {
renice = -renice;
@ -228,13 +228,14 @@ static void game_mode_apply_scheduler(GameModeContext *self, pid_t client)
* don't adjust priority if it was already adjusted
*/
if (getpriority(PRIO_PROCESS, (id_t)client) != 0) {
LOG_ERROR("Client [%d] already reniced, ignoring.\n", client);
LOG_ERROR("Refused to renice client [%d]: already reniced\n", client);
} else if (setpriority(PRIO_PROCESS, (id_t)client, (int)renice)) {
LOG_ERROR(
"Renicing client [%d] failed with error %d, ignoring (your user may not have "
"permission to do this).\n",
"Failed to renice client [%d], ignoring error condition: %s\n"
" -- Your user may not have permission to do this. Please read the docs\n"
" -- to learn how to adjust the pam limits.\n",
client,
errno);
strerror(errno));
}
/*
@ -257,14 +258,45 @@ static void game_mode_apply_scheduler(GameModeContext *self, pid_t client)
if (!(strcmp(softrealtime, "off") == 0) && (enable_softrealtime)) {
const struct sched_param p = { .sched_priority = 0 };
if (sched_setscheduler(client, SCHED_ISO | SCHED_RESET_ON_FORK, &p)) {
const char *additional_message = "";
switch (errno) {
case EPERM: {
static int once = 0;
if (once++)
break;
additional_message =
" -- The error indicates that you may be running a resource management\n"
" -- daemon managing your game launcher and it leaks lower scheduling\n"
" -- classes into the games. This is likely a bug in the management daemon\n"
" -- and not a bug in GameMode, it should be reported upstream.\n"
" -- If unsure, please also look here:\n"
" -- https://github.com/FeralInteractive/gamemode/issues/68\n";
break;
}
case EINVAL: {
static int once = 0;
if (once++)
break;
additional_message =
" -- The error indicates that your kernel may not support this. If you\n"
" -- don't know what SCHED_ISO means, you can safely ignore this. If you\n"
" -- expected it to work, ensure you're running a kernel with MuQSS or\n"
" -- PDS scheduler.\n"
" -- For further technical reading on the topic start here:\n"
" -- https://lwn.net/Articles/720227/\n";
break;
}
}
LOG_ERROR(
"Setting client [%d] to SCHED_ISO failed with error %d, ignoring (your "
"kernel may not support this).\n",
"Failed setting client [%d] into SCHED_ISO mode, ignoring error condition: %s\n%s",
client,
errno);
strerror(errno),
additional_message);
}
} else {
LOG_ERROR("Not using softrealtime, setting is '%s'.\n", softrealtime);
LOG_ERROR("Skipped setting client [%d] into SCHED_ISO mode: softrealtime setting is '%s'\n",
client,
softrealtime);
}
}