Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
gamemode: Apply io priority to clients
This commit allows changing the io priority of the client to a value specified in the configuration file. That can possibly reduce lags or latency when a game has to load assets on demand and you have background IO activity running (or other concurrent IO). Signed-off-by: Kai Krakow <kai@kaishome.de>
- Loading branch information
Showing
3 changed files
with
138 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,82 @@ | ||
/* | ||
Copyright (c) 2017-2018, Feral Interactive | ||
All rights reserved. | ||
Redistribution and use in source and binary forms, with or without | ||
modification, are permitted provided that the following conditions are met: | ||
* Redistributions of source code must retain the above copyright notice, | ||
this list of conditions and the following disclaimer. | ||
* Redistributions in binary form must reproduce the above copyright | ||
notice, this list of conditions and the following disclaimer in the | ||
documentation and/or other materials provided with the distribution. | ||
* Neither the name of Feral Interactive nor the names of its contributors | ||
may be used to endorse or promote products derived from this software | ||
without specific prior written permission. | ||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
POSSIBILITY OF SUCH DAMAGE. | ||
*/ | ||
|
||
#pragma once | ||
|
||
#define _GNU_SOURCE | ||
#include <sys/syscall.h> | ||
#include <unistd.h> | ||
|
||
/** | ||
* Define the syscall interface in Linux because it is missing from glibc | ||
*/ | ||
|
||
#ifndef IOPRIO_BITS | ||
#define IOPRIO_BITS (16) | ||
#endif | ||
|
||
#ifndef IOPRIO_CLASS_SHIFT | ||
#define IOPRIO_CLASS_SHIFT (13) | ||
#endif | ||
|
||
#ifndef IOPRIO_PRIO_MASK | ||
#define IOPRIO_PRIO_MASK ((1UL << IOPRIO_CLASS_SHIFT) - 1) | ||
#endif | ||
|
||
#ifndef IOPRIO_PRIO_CLASS | ||
#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT) | ||
#endif | ||
|
||
#ifndef IOPRIO_PRIO_DATA | ||
#define IOPRIO_PRIO_DATA(mask) ((mask)&IOPRIO_PRIO_MASK) | ||
#endif | ||
|
||
#ifndef IOPRIO_PRIO_VALUE | ||
#define IOPRIO_PRIO_VALUE(class, data) (((class) << IOPRIO_CLASS_SHIFT) | data) | ||
#endif | ||
|
||
enum { | ||
IOPRIO_CLASS_NONE, | ||
IOPRIO_CLASS_RT, | ||
IOPRIO_CLASS_BE, | ||
IOPRIO_CLASS_IDLE, | ||
}; | ||
|
||
enum { | ||
IOPRIO_WHO_PROCESS = 1, | ||
IOPRIO_WHO_PGRP, | ||
IOPRIO_WHO_USER, | ||
}; | ||
|
||
static inline int ioprio_set(int which, int who, int ioprio) | ||
{ | ||
return (int)syscall(SYS_ioprio_set, which, who, ioprio); | ||
} |