** Changed in: linux-2.6 (Debian)
Status: Incomplete = Fix Released
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of wakes per second in [kernel scheduler] Load
** Changed in: linux (Ubuntu)
Assignee: Matúš Behun (matus-behun) = (unassigned)
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of wakes per second in [kernel scheduler]
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Matúš Behun (matus-behun)
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of wakes per second in [kernel scheduler]
The desired commit has been applied an released in Lucid (and all other
stable kernels). Please update with the latest SRU kernel.
** Changed in: linux (Ubuntu)
Status: Confirmed = Fix Released
--
You received this bug notification because you are a member of Ubuntu-X,
which is
Yuppie, now it seems again that I have found the good combination:
- Nothing fixes the cpu frequency flickering. The laptop just shits on the
cpufreq settings and decides on its own, what is the best frequency for me.
Come on... Sucks.
- This Load balancing tick bullshit stopped when I
I think I had the same problem on a Dell Latitude E4300 (Core 2/P9300)
and the interesting thing was that the overload happened mostly when the
laptop was being charged and when I removed the AC adapter to run on
battery, after some minutes, the laptop was responsible again. In my
case, when this
A bit off-topic to my previous comment: The PPA version of the intel
driver did not make any difference, however, the bluetooth causes the
system hang before or after suspend if it is enabled. I did not mind too
much just disabled the bluetooth in the Bios.
Now, the system seems to be stable.
--
I have updated my tests for both the latest 2.6.38 kernel of natty and the
latest 2.6.34 kernel from mainline as suggested, on my Thinkpad T61 laptop.
After login I have sudoed previously, then run:
sudo powertop -d -t 60 ~/Desktop/powertop_dump-`uname -r`.log
Running on battery, not having
Yes I have also seen a similar degradation between the two kernels. What
is notable in your case and mine is that the kernel interrupts are
labelled differently between the two cases. There are actually fewer
load balancing ticks in the later kernel but other categories eg [extra
timer interrupt]
On 5/17/2011 10:59 PM, skhawam wrote:
-Compiz generates a lot of wakeups on the GPU, so I removed all the features
that I dont use and kept only the ones I use
I once found a DRI configuration utility that could disable vsync and
found that got rid of a lot of wakeups from the GPU.
--
You
That script looks useful, thanks for posting it.
I've all turned round on the subject. I ran Ubuntu Classic (no effects)
and ran powertop with no apps running. It was significantly better than
in Ubuntu 10.10. It was actually really good. The red bar in powertop
that shows wakeups-from-idle
I have a Dell Mini 10v and managed to get good results with Natty
(11.04) after some fiddling around. It's better than any other version I
had till now (I have been following this bug since its beginning!).
Without wireless I get 20ms C3 state, and with wireless one around 3ms
C3 state (with no
My two cents is that I was waiting for Ubuntu Natty for a newer kernel
and therefore better performance, but I appear to have more wakeups and
less battery life than before.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
I'm with oldmankit on this - the situation is getting worse rather than
better. I wrote a script mostly based on lesswatts.org suggestions
which, for my HP Probook 4720s halves wakeups (still at 50/sec) and
reduces fan usage. Use at your own discretion :-)
** Attachment added: implements known
Only a few weeks ago I started looking for the root cause of my laptop's
noise and heat. I used Ubuntu Lucid 10.04 on a dual core laptop and
eventually found this bug.
I tried newer kernels from
https://launchpad.net/~kernel-ppa/+archive/ppa?field.series_filter=lucid
Unfortunately, experience
This bug I suppose is the root cause of the second power consumption regression
found here:
http://www.phoronix.com/scan.php?page=articleitem=linux_kernel_regress2
Basically power usage looks like:
- 2.6.24-2.6.34: average of all tests ~21-22W
- 2.6.35-2.6.37: average of all tests ~25W
-
The last two comments on this bug are contradictory. Checking powertop
with the 2.6.38 kernel for natty versus earlier kernels shows for me
that the *type* of kernel interrupt has changed but the number of them
has not and has increased if anything. I think this bug is serious and
getting worse
I tried Natty, this bug is finally solved with the 2.6.38 kernel
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of wakes per second in [kernel scheduler] Load balancing tick
@Jeremy Foshee, this seems to be a regression between Lucid alpha 2 and
alpha 3, and it's affecting LTS users with MUCH lower battery life than
expected, hence it's a hardware problem.
Please could you reconsider your rejection for Lucid?
--
You received this bug notification because you are a
ggonlp: it might be the case, that 2.6.36 fixes balancing wakeups, but
introduces worker wakeups. 2.6.37 and 2.6.38 should be okay on the other
hand. Have you tried those?
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.
Sorry, not yet - thanks for the hint though. I'm on an HP laptop and new
kernels mean for me every time an odyssey as graphics and wifi will take
a good day's work to get running :-(
On 03/08/2011 10:43 PM, Peter Sasi wrote:
ggonlp: it might be the case, that 2.6.36 fixes balancing wakeups,
I'm seeing this too on Ubuntu Maverick 32-bit (kernel 2.6.35-27-generic-
pae) on an Intel Core Duo quad core 3 GHz processor. Around 50% [kernel
scheduler] Load balancing tick pretty much continously.
My apologies if this has already been explained somewhere, but exactly
what is a load balancing
@Captain Chaos: To keep it short: These ticks are imposed by the Linux
Kernel while trying to shift balance the workload over the available
CPU cores. The problem here is, that these ticks occur during idling
phases and therefore inhibit the CPUs to fall into their power-saving
states. A little
@Benjamin Schmid: I think the fix is done in the Linux tree (practically all
versions later than 2.6.35 behave a lot better), it just has not been ported
back to the ubuntu 2.6.35 tree...
And it is much annoying...
--
You received this bug notification because you are a member of Ubuntu-X,
This problem appeared in 2.6.32 Kernel.
Beginning with 2.6.37 Kernel this is solved.
I observe increased battery life (+15-20%) in my old laptop.
sudo powertop, agrees with this impression
Ubuntu users can use this kernel
http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D
but they are going
This is fixed in the current Natty (beta) with kernel 2.6.38-5-generic
(the stock kernel).
On Maverick I was getting several hundred wakeups per second on the
stock kernel (2.6.35-something), almost all from the load balancing
tick.
Now the load balancing tick is rarely listed in the 'top causes
I remember trying that out a few weeks ago (think it was a 2.6.36
kernel). While the load balancer wakeups were gone, I got just as many
from a kworker process, so no real improvement...
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in
powertop on Asus U35JC with Intel Core i3
Top causes for wakeups:
47.5% (228.6) [kernel scheduler] Load balancing tick
26.9% (129.6) firefox-bin
3.5% ( 16.9) thunderbird-bin
2.7% ( 13.0) USB device 2-1.3 : USB Receiver (Logitech)
Tried linux-image-2.6.37-020637rc2-generic
@florinn: Please close all applications (especially firefox and
thunderbird) before posting such measurements. In your case, firefox is
probably running some heavy animations or executing some scripts with
many timeouts. It is not the kernel's fault that the user-space is
generating useless
florinn:
that's my experience too, 2.6.37 makes my laptop silent again, and the load
balancing ticks are much, much fewer.
I see that you run the RC2 version of 2.6.37, just thought I'd mention
that the final version of 2.6.37 is out on http://kernel.ubuntu.com
/~kernel-ppa/mainline/. The name
Really an annoying bug. Why will it not be fixed in LTS? Really a
showstopper on mobile systems.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of wakes per second in [kernel
Same problem here on a Thinkpad Edge 11 AMD Neo II K325:
Wakeups-from-idle per second : 355.6 interval: 15.0s
49.5% (313.0) [Rescheduling interrupts] kernel IPI
19.7% (124.3) [kernel scheduler] Load balancing tick
Would be great if this problem can be solved with Natty.
--
You
Benjamin Schmid:
As long as Natty uses the 2.6.36 or later, this should not be a problem - it is
a kernel issue, not an issue related to Ubuntu alone.
WebNull:
It will most definitely extend your battery life! Using the mainline kernel has
helped a lot :)
--
You received this bug notification
On Intel Celeron 900 mhz i have same problem, powertop reports me
[kernel scheduler] Load balancing tick at the top (15-30%).
Fixing this bug my Tablet PC's battery life will extend i think.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg
For the learned .
Adding as a point to start with .. no guarantees that this is the Saviour
just a lead to who can get the heads and tails out of it
# diff -cp tick-sched.c(2.6.37-rc4) tick-sched.c(2.6.25-23)
...
*** tick.sched-2.6.37-rc4.c 2010-12-06 17:50:03.960025002
Exploring the latest code on github. Comparing the two.
Again, no guarantees. This is just a lead, for the brave at heart
--- tick-sched-2.6.35-23.c 2010-12-06 22:44:02.821102001 +0530
+++ tick-sched-2.6.37-github.c 2010-12-06 22:42:40.451102001 +0530
@@ -405,13 +405,7 @@ void
Just installed the 2.6.36 mainline kernel from http://kernel.ubuntu.com
/~kernel-ppa/mainline/v2.6.36-maverick/.
VMWare Player is not working, but that's another story.
[kernel scheduler] Load balancing tick = 2.3
[extra timer interrupt] = 11.7
Total interrupts under idle conditions = 66.7
@Gurmeet
It all sounds very positive. For those of us that don't want to get
their fingers dirty playing around with different kernel versions, there
will be a lot of satisfaction when this fix finds itself into the
official repos!
--
You received this bug notification because you are a member
The commit to backport would be 83cd4fe, which has many more changes
than just to kernel/time/tick-sched.c You can look at the complete diff
at https://github.com/mirrors/linux-2.6/commit/83cd4fe
af5ab27 might also help somewhat, but I believe the other one is the
major culprit.
--
You
That would be awesome Alex. I'm really looking forward to resolving this
long standing issue with the LTS version of Ubuntu.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.
https://bugs.launchpad.net/bugs/524281
Title:
Tens of
Just tried the v2.6.37-rc2-maverick from Ubuntu Mainline.
The load balancing ticks are down to 2 (in words, two) from 60 or so per second.
Ran it for a few minutes. M/c is less noisy and temperatures are down by a bit
(1-2 deg), but that can be very well be within a margin of error.
I run
Finally got the 2.6.36 mainline kernel to work with both ATI and Nvidia drivers!
Wrote a little howto here: http://www.bjortvedtdata.net/?p=199
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.
I tried the mainline 2.6.36 kernel and it seems to work better, but I do get a
lot of kworker wakeups.
I also cannot get the ATI driver to work (downloaded from ati.amd.com) when
running this kernel, so it's pretty useless.
--
Tens of wakes per second in [kernel scheduler] Load balancing tick
Just a me-too report. i am also getting this as the top of the list when
seen with powertop.
Average around 43 is the number of wakeups/sec from [Kernel Scheduler]
Load Balancing Tick.
I don't want to disable compiz, so haven't yet tried out the workaround
as at-least for me, that's not a
Following up on one of the earlier mails containing a patch from Brian Rogers
Patch Details:
http://launchpadlibrarian.net/52089149/0001-Apply-patch-from-http-lkml.org-lkml-2010-7-8-122.patch
OK, in 2.6.35, linux-source, on line 328 in /kernel/time/tick-sched.c, this is
what I see:
if
Gurmeet, please try kernel 2.6.36.
--
Tens of wakes per second in [kernel scheduler] Load balancing tick on Core 2
Duo even with only 1 core enabled
https://bugs.launchpad.net/bugs/524281
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in
[Looks to be a kernel bug rather than xorg. If there is actual work to
be done on xorg in relation to this issue, please file a new bug report
about it, since this one has gotten too long to grok.]
** Changed in: xorg (Ubuntu)
Status: New = Invalid
--
Tens of wakes per second in [kernel
** Changed in: linux (Ubuntu)
Status: Triaged = Confirmed
--
Tens of wakes per second in [kernel scheduler] Load balancing tick on Core 2
Duo even with only 1 core enabled
https://bugs.launchpad.net/bugs/524281
You received this bug notification because you are a member of Ubuntu-X,
** Attachment added: powertopLenovoR61Core2DuoT7100.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524281/+attachment/1731649/+files/powertopLenovoR61Core2DuoT7100.txt
--
Tens of wakes per second in [kernel scheduler] Load balancing tick on Core 2
Duo even with only 1 core
** Attachment added: powertop-dump-5min-2.6.36-020636-generic.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524281/+attachment/1722665/+files/powertop-dump-5min-2.6.36-020636-generic.txt
** Also affects: xorg (Ubuntu)
Importance: Undecided
Status: New
--
Tens of wakes
Xcausing wakeups may coincide with enabled composing. On my Intel
chipset graphics, this
causes approx. an additional 50 wakeups per second. If composing is
disabled, everything is
back to normal. On another notebook with a Radeon 5470 (using fglrx),
there was no such
difference.
In addition, it
On my Intel 945GM
with no compiz or effects
tried to explicitly disable composite in xorg.conf as per previous comment
makes NO difference to me.
hundreds of wakeups, and my netbook is now at 55 minutes uptime by battery.
It feels like having an... umbilical cable.
Ubuntu 10.10 with latest
Here is the output from sudo powertop -t60 -d on Lenovo 3000 n200 with intel
centrino 550 @ 2.00 GHz with nVidia Geforce Go 7300 and nVidia Proprietary
driver enabled on Maverick UNE Unity fully updated.
No application was running in background!
--
Tens of wakes per second in [kernel
** Attachment added: PowerTop Unity
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/524281/+attachment/1722742/+files/PowerTop%20Unity
--
Tens of wakes per second in [kernel scheduler] Load balancing tick on Core 2
Duo even with only 1 core enabled
Please note, that X is not causing wakeups itself, but it induces [kernel
scheduler] Load balancing ticks to occour, in my tests.
I have compiz disabled.
--
Tens of wakes per second in [kernel scheduler] Load balancing tick on Core 2
Duo even with only 1 core enabled
Linux shadow 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:45:36 UTC
2010 x86_64 GNU/Linux
** Attachment added: powerTopAcer5520g.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524281/+attachment/1722961/+files/powerTopAcer5520g.txt
--
Tens of wakes per second in [kernel
56 matches
Mail list logo
