lineage: Add support for BFQIO cgroups
* Introduce a standalone libbfqio to be picked by inputflinger,
surfaceflinger and display HAL, without extending the VNDK.
* This commit is based on the following patches:
From: Steve Kondik <steve@cyngn.com>
Date: Tue, 08 Sep 2015 02:23:41 -0700
cutils: Add support for BFQIO cgroups
* Add support for a custom hierarchy of cgroups on top of the BFQ
IO scheduler. This allows us to place every thread into the
right class (realtime/best-effort/idle) with a set up priority
buckets depending on use case.
* The benefit of doing this is pretty incredible from an
interactivity standpoint. Realtime users (display/audio) benefit
the most, resulting in glitch-free audio and jank-free video.
Dexopting in the background no longer causes active harm to
foreground tasks. Other tasks such as account syncing become
invisible from the user's perspective.
* Magic bullet? Perhaps.
Change-Id: I4eb911395364ce46d6dcbff43e94286ded03a97d
From: Steve Kondik <steve@cyngn.com>
Date: Sat, 19 Sep 2015 12:43:40 -0700
cutils: Fix copypasta in ioprio code
Change-Id: I976693be4a6913ed2090fa32d0f8e4c93657e7e7
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 01:08:07 -0700
cutils: Fix display ioprio
* A few unwanted items are sneaking into this class resulting in
system slowdowns. Fixit.
Change-Id: I29033a38adf2c65535f916135d395d5147afe323
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 03:00:54 -0700
cutils: Clean up ioprio grouping
* It's now better understood what's happening system-wide due to these
changes, so clean up the stuff which is not necessary and/or
potentially harmful.
Change-Id: I72178770844c1ac388a0b424b12cdc49042aec87
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 17:36:54 -0700
cutils: Remove ioprio magic
* ..and replace it with something we can call explictly where it is
required in order to achieve the same goodness without the badness.
Change-Id: I605b3acbc56ce82663dd6f1c9f3320d0ab75e178
From: Zhao Wei Liew <zhaoweiliew@gmail.com>
Date: Thu, 08 Sep 2016 20:01:29 +0800
cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio
AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/.
Follow what AOSP does.
Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
Change-Id: I7d42bd6bb9176724c1e5687de14946923150ae89
7 years ago
|
|
|
/*
|
|
|
|
* Copyright (C) 2017 The LineageOS Project
|
|
|
|
*
|
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
* you may not use this file except in compliance with the License.
|
|
|
|
* You may obtain a copy of the License at
|
|
|
|
*
|
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
*
|
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
* See the License for the specific language governing permissions and
|
|
|
|
* limitations under the License.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define LOG_TAG "bfqio"
|
|
|
|
|
|
|
|
#include <errno.h>
|
lineage: Add support for BFQIO cgroups
* Introduce a standalone libbfqio to be picked by inputflinger,
surfaceflinger and display HAL, without extending the VNDK.
* This commit is based on the following patches:
From: Steve Kondik <steve@cyngn.com>
Date: Tue, 08 Sep 2015 02:23:41 -0700
cutils: Add support for BFQIO cgroups
* Add support for a custom hierarchy of cgroups on top of the BFQ
IO scheduler. This allows us to place every thread into the
right class (realtime/best-effort/idle) with a set up priority
buckets depending on use case.
* The benefit of doing this is pretty incredible from an
interactivity standpoint. Realtime users (display/audio) benefit
the most, resulting in glitch-free audio and jank-free video.
Dexopting in the background no longer causes active harm to
foreground tasks. Other tasks such as account syncing become
invisible from the user's perspective.
* Magic bullet? Perhaps.
Change-Id: I4eb911395364ce46d6dcbff43e94286ded03a97d
From: Steve Kondik <steve@cyngn.com>
Date: Sat, 19 Sep 2015 12:43:40 -0700
cutils: Fix copypasta in ioprio code
Change-Id: I976693be4a6913ed2090fa32d0f8e4c93657e7e7
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 01:08:07 -0700
cutils: Fix display ioprio
* A few unwanted items are sneaking into this class resulting in
system slowdowns. Fixit.
Change-Id: I29033a38adf2c65535f916135d395d5147afe323
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 03:00:54 -0700
cutils: Clean up ioprio grouping
* It's now better understood what's happening system-wide due to these
changes, so clean up the stuff which is not necessary and/or
potentially harmful.
Change-Id: I72178770844c1ac388a0b424b12cdc49042aec87
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 17:36:54 -0700
cutils: Remove ioprio magic
* ..and replace it with something we can call explictly where it is
required in order to achieve the same goodness without the badness.
Change-Id: I605b3acbc56ce82663dd6f1c9f3320d0ab75e178
From: Zhao Wei Liew <zhaoweiliew@gmail.com>
Date: Thu, 08 Sep 2016 20:01:29 +0800
cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio
AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/.
Follow what AOSP does.
Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
Change-Id: I7d42bd6bb9176724c1e5687de14946923150ae89
7 years ago
|
|
|
#include <fcntl.h>
|
|
|
|
#include <cutils/iosched_policy.h>
|
|
|
|
#include <log/log.h>
|
lineage: Add support for BFQIO cgroups
* Introduce a standalone libbfqio to be picked by inputflinger,
surfaceflinger and display HAL, without extending the VNDK.
* This commit is based on the following patches:
From: Steve Kondik <steve@cyngn.com>
Date: Tue, 08 Sep 2015 02:23:41 -0700
cutils: Add support for BFQIO cgroups
* Add support for a custom hierarchy of cgroups on top of the BFQ
IO scheduler. This allows us to place every thread into the
right class (realtime/best-effort/idle) with a set up priority
buckets depending on use case.
* The benefit of doing this is pretty incredible from an
interactivity standpoint. Realtime users (display/audio) benefit
the most, resulting in glitch-free audio and jank-free video.
Dexopting in the background no longer causes active harm to
foreground tasks. Other tasks such as account syncing become
invisible from the user's perspective.
* Magic bullet? Perhaps.
Change-Id: I4eb911395364ce46d6dcbff43e94286ded03a97d
From: Steve Kondik <steve@cyngn.com>
Date: Sat, 19 Sep 2015 12:43:40 -0700
cutils: Fix copypasta in ioprio code
Change-Id: I976693be4a6913ed2090fa32d0f8e4c93657e7e7
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 01:08:07 -0700
cutils: Fix display ioprio
* A few unwanted items are sneaking into this class resulting in
system slowdowns. Fixit.
Change-Id: I29033a38adf2c65535f916135d395d5147afe323
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 03:00:54 -0700
cutils: Clean up ioprio grouping
* It's now better understood what's happening system-wide due to these
changes, so clean up the stuff which is not necessary and/or
potentially harmful.
Change-Id: I72178770844c1ac388a0b424b12cdc49042aec87
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 17:36:54 -0700
cutils: Remove ioprio magic
* ..and replace it with something we can call explictly where it is
required in order to achieve the same goodness without the badness.
Change-Id: I605b3acbc56ce82663dd6f1c9f3320d0ab75e178
From: Zhao Wei Liew <zhaoweiliew@gmail.com>
Date: Thu, 08 Sep 2016 20:01:29 +0800
cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio
AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/.
Follow what AOSP does.
Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
Change-Id: I7d42bd6bb9176724c1e5687de14946923150ae89
7 years ago
|
|
|
#include <pthread.h>
|
|
|
|
#include <string.h>
|
lineage: Add support for BFQIO cgroups
* Introduce a standalone libbfqio to be picked by inputflinger,
surfaceflinger and display HAL, without extending the VNDK.
* This commit is based on the following patches:
From: Steve Kondik <steve@cyngn.com>
Date: Tue, 08 Sep 2015 02:23:41 -0700
cutils: Add support for BFQIO cgroups
* Add support for a custom hierarchy of cgroups on top of the BFQ
IO scheduler. This allows us to place every thread into the
right class (realtime/best-effort/idle) with a set up priority
buckets depending on use case.
* The benefit of doing this is pretty incredible from an
interactivity standpoint. Realtime users (display/audio) benefit
the most, resulting in glitch-free audio and jank-free video.
Dexopting in the background no longer causes active harm to
foreground tasks. Other tasks such as account syncing become
invisible from the user's perspective.
* Magic bullet? Perhaps.
Change-Id: I4eb911395364ce46d6dcbff43e94286ded03a97d
From: Steve Kondik <steve@cyngn.com>
Date: Sat, 19 Sep 2015 12:43:40 -0700
cutils: Fix copypasta in ioprio code
Change-Id: I976693be4a6913ed2090fa32d0f8e4c93657e7e7
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 01:08:07 -0700
cutils: Fix display ioprio
* A few unwanted items are sneaking into this class resulting in
system slowdowns. Fixit.
Change-Id: I29033a38adf2c65535f916135d395d5147afe323
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 03:00:54 -0700
cutils: Clean up ioprio grouping
* It's now better understood what's happening system-wide due to these
changes, so clean up the stuff which is not necessary and/or
potentially harmful.
Change-Id: I72178770844c1ac388a0b424b12cdc49042aec87
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 17:36:54 -0700
cutils: Remove ioprio magic
* ..and replace it with something we can call explictly where it is
required in order to achieve the same goodness without the badness.
Change-Id: I605b3acbc56ce82663dd6f1c9f3320d0ab75e178
From: Zhao Wei Liew <zhaoweiliew@gmail.com>
Date: Thu, 08 Sep 2016 20:01:29 +0800
cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio
AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/.
Follow what AOSP does.
Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
Change-Id: I7d42bd6bb9176724c1e5687de14946923150ae89
7 years ago
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <unistd.h>
|
lineage: Add support for BFQIO cgroups
* Introduce a standalone libbfqio to be picked by inputflinger,
surfaceflinger and display HAL, without extending the VNDK.
* This commit is based on the following patches:
From: Steve Kondik <steve@cyngn.com>
Date: Tue, 08 Sep 2015 02:23:41 -0700
cutils: Add support for BFQIO cgroups
* Add support for a custom hierarchy of cgroups on top of the BFQ
IO scheduler. This allows us to place every thread into the
right class (realtime/best-effort/idle) with a set up priority
buckets depending on use case.
* The benefit of doing this is pretty incredible from an
interactivity standpoint. Realtime users (display/audio) benefit
the most, resulting in glitch-free audio and jank-free video.
Dexopting in the background no longer causes active harm to
foreground tasks. Other tasks such as account syncing become
invisible from the user's perspective.
* Magic bullet? Perhaps.
Change-Id: I4eb911395364ce46d6dcbff43e94286ded03a97d
From: Steve Kondik <steve@cyngn.com>
Date: Sat, 19 Sep 2015 12:43:40 -0700
cutils: Fix copypasta in ioprio code
Change-Id: I976693be4a6913ed2090fa32d0f8e4c93657e7e7
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 01:08:07 -0700
cutils: Fix display ioprio
* A few unwanted items are sneaking into this class resulting in
system slowdowns. Fixit.
Change-Id: I29033a38adf2c65535f916135d395d5147afe323
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 03:00:54 -0700
cutils: Clean up ioprio grouping
* It's now better understood what's happening system-wide due to these
changes, so clean up the stuff which is not necessary and/or
potentially harmful.
Change-Id: I72178770844c1ac388a0b424b12cdc49042aec87
From: Steve Kondik <steve@cyngn.com>
Date: Sun, 20 Sep 2015 17:36:54 -0700
cutils: Remove ioprio magic
* ..and replace it with something we can call explictly where it is
required in order to achieve the same goodness without the badness.
Change-Id: I605b3acbc56ce82663dd6f1c9f3320d0ab75e178
From: Zhao Wei Liew <zhaoweiliew@gmail.com>
Date: Thu, 08 Sep 2016 20:01:29 +0800
cutils: iosched_policy: Access BFQIO cgroup in /dev/bfqio
AOSP doesn't mount cgroups in /sys/fs/cgroup, but in /dev/.
Follow what AOSP does.
Change-Id: I40d2241e3e5c41612d3a54d22981d3250f8b1ed6
Change-Id: I7d42bd6bb9176724c1e5687de14946923150ae89
7 years ago
|
|
|
|
|
|
|
static int __rtio_cgroup_supported = -1;
|
|
|
|
static pthread_once_t __rtio_init_once = PTHREAD_ONCE_INIT;
|
|
|
|
|
|
|
|
static void __initialize_rtio(void) {
|
|
|
|
if (!access("/dev/bfqio/tasks", W_OK) || !access("/dev/bfqio/rt-display/tasks", W_OK)) {
|
|
|
|
__rtio_cgroup_supported = 1;
|
|
|
|
} else {
|
|
|
|
__rtio_cgroup_supported = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int android_set_rt_ioprio(int tid, int rt) {
|
|
|
|
int fd = -1, rc = -1;
|
|
|
|
|
|
|
|
pthread_once(&__rtio_init_once, __initialize_rtio);
|
|
|
|
if (__rtio_cgroup_supported != 1) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rt) {
|
|
|
|
fd = open("/dev/bfqio/rt-display/tasks", O_WRONLY | O_CLOEXEC);
|
|
|
|
} else {
|
|
|
|
fd = open("/dev/bfqio/tasks", O_WRONLY | O_CLOEXEC);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fd < 0) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef HAVE_GETTID
|
|
|
|
if (tid == 0) {
|
|
|
|
tid = gettid();
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// specialized itoa -- works for tid > 0
|
|
|
|
char text[22];
|
|
|
|
char *end = text + sizeof(text) - 1;
|
|
|
|
char *ptr = end;
|
|
|
|
*ptr = '\0';
|
|
|
|
while (tid > 0) {
|
|
|
|
*--ptr = '0' + (tid % 10);
|
|
|
|
tid = tid / 10;
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = write(fd, ptr, end - ptr);
|
|
|
|
if (rc < 0) {
|
|
|
|
/*
|
|
|
|
* If the thread is in the process of exiting,
|
|
|
|
* don't flag an error
|
|
|
|
*/
|
|
|
|
if (errno == ESRCH) {
|
|
|
|
rc = 0;
|
|
|
|
} else {
|
|
|
|
SLOGV("android_set_rt_ioprio failed to write '%s' (%s); fd=%d\n",
|
|
|
|
ptr, strerror(errno), fd);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
close(fd);
|
|
|
|
return rc;
|
|
|
|
}
|