Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add property to skip idle state for zram writeback

Browse Source 
Go devices benefit from a early writeback cycle of zram contents to
disk. Waiting for idle will delay the first writeback by a few hours.
Setting zram.force_writeback will allow kicking off writeback
when the device is not idle. The writeback takes a few seconds and did
not show noticible difference in user experience.

Bug: 141756630
Test: Device boots up and writeback works as expected
Change-Id: I4dd9a2d44f5ebd30f14ecbc6401dd05390c08bf6
This commit is contained in:
Srinivas Paladugu
2019-10-22 10:47:05 -07:00
parent ad3e08aa69
commit 23d6f0aba6
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
services/core/java/com/android/server/ZramWriteback.java
View File

@@ -60,6 +60,7 @@ public final class ZramWriteback extends JobService {
private static final String MARK_IDLE_DELAY_PROP = "ro.zram.mark_idle_delay_mins";
private static final String FIRST_WB_DELAY_PROP = "ro.zram.first_wb_delay_mins";
private static final String PERIODIC_WB_DELAY_PROP = "ro.zram.periodic_wb_delay_hours";
private static final String FORCE_WRITEBACK_PROP = "zram.force_writeback";
private void markPagesAsIdle() {
String idlePath = String.format(IDLE_SYS, sZramDeviceId);
@@ -122,11 +123,12 @@ public final class ZramWriteback extends JobService {
private static void schedNextWriteback(Context context) {
int nextWbDelay = SystemProperties.getInt(PERIODIC_WB_DELAY_PROP, 24);
boolean forceWb = SystemProperties.getBoolean(FORCE_WRITEBACK_PROP, false);
JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
js.schedule(new JobInfo.Builder(WRITEBACK_IDLE_JOB_ID, sZramWriteback)
.setMinimumLatency(TimeUnit.HOURS.toMillis(nextWbDelay))
.setRequiresDeviceIdle(true)
.setRequiresDeviceIdle(!forceWb)
.build());
}
@@ -167,6 +169,7 @@ public final class ZramWriteback extends JobService {
public static void scheduleZramWriteback(Context context) {
int markIdleDelay = SystemProperties.getInt(MARK_IDLE_DELAY_PROP, 20);
int firstWbDelay = SystemProperties.getInt(FIRST_WB_DELAY_PROP, 180);
boolean forceWb = SystemProperties.getBoolean(FORCE_WRITEBACK_PROP, false);
JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
@@ -182,7 +185,7 @@ public final class ZramWriteback extends JobService {
// by ro.zram.periodic_wb_delay_hours.
js.schedule(new JobInfo.Builder(WRITEBACK_IDLE_JOB_ID, sZramWriteback)
.setMinimumLatency(TimeUnit.MINUTES.toMillis(firstWbDelay))
.setRequiresDeviceIdle(true)
.setRequiresDeviceIdle(!forceWb)
.build());
}
}