These are patches designed to improve system responsiveness and interactivity.
It is configurable to any workload but the default ck patch is aimed at the
desktop and cks is available with more emphasis on serverspace.
Apply to 2.6.16
http://ck.kolivas.org/patches/2.6/2.6.16/2.6.16-ck1/patch-2.6.16-ck1.bz2
or server version
http://ck.kolivas.org/patches/cks/patch-2.6.16-cks1.bz2
web:
http://kernel.kolivas.org
all patches:
http://ck.kolivas.org/patches/
Split patches available.
* Take note, userspace features have changed in this version *
There are 3 special unprivileged (normal user) scheduling policies available
as of 2.6.16-ck1. These can be set using the schedtools utility
(http://freshmeat.net/projects/schedtool/?topic_id=136) which has support for
all of them. Additionally my toolsched scripts work as transparent wrappers
for them (http://ck.kolivas.org/apps/toolsched/). Note the policies are
different to earlier -ck versions:
SCHED_BATCH:
This is for tasks you explicitly want the cpu scheduler to know are never
interactive and thus should never receive low latency treatment. Their cpu
usage is dependant on their nice value. This policy is also supported by
mainline now which is why there is a change of the naming/numbering scheme.
SCHED_ISO:
This is for tasks you explicitly want the cpu scheduler to know are low
latency real-time like tasks but you don't have root privileges for and don't
wish them to ever starve the machine. They can use up to 80% of the available
cpu time (on one cpu at any time). This percentage is configurable
via /proc/sys/kernel/iso_cpu
SCHED_IDLEPRIO:
This is for tasks you never want to use cpu if *anything* else wants cpu
time. That is they only ever use spare cpu cycles that would have otherwise
been idle time on the machine.
Changes since 2.6.15-ck7
Added:
+sched-implement-smpnice.patch
+sched-smpnice-apply-review-suggestions.patch
+sched-smpnice-fix-average-load-per-run-queue-calculations.patch
New improved smpnice implementation
+sched-store-weighted-load-on-up.patch
+sched-add-discrete-weighted-cpu-load-function.patch
+sched-add-above-background-load-function.patch
Updates to smpnice above to be used by swap prefetch
+sched-generic_optims2.patch
Small naming cleanups / microoptimisations
+sched-idleprio-1.2.patch
The old SCHED_BATCH policy from 2.6.15-ck7 has been renamed to SCHED_IDLEPRIO
and small updates to the policy were committed.
+adaptive-readahead-11.patch
Wu Fengguang's adaptive readahead for improved read throughput without
thrashing. This version is configurable at build time. As some users have
reported latency issues with running this code, the config option is most
welcome, however those latency issues should have been mostly addressed. See
Documentation/sysctl/vm.txt for more info.
Removed:
-vmsplit-config_options.patch
This is part of mainline 2.6.16 now
-2.6.15-dynticks-060227.patch
-dynticks-disable_smp_config.patch
Dynticks is dead! Long live dynticks! Something killed it off in 2.6.16-rc6
and I haven't figured out what it is. I don't know if/when I'll be able to
debug this so for the moment it is dropped.
-patch-2.6.15.6.bz2
Mainline
Modified:
-sched-staircase13.2.patch
-sched-staircase13.2_13.3.patch
-sched-staircase13.3_13.4.patch
-sched-staircase13.4_13.5.patch
+sched-staircase14.2.patch
Rolled up and updated to latest version of staircase cpu scheduler. Mostly
microoptimisations, and intrinsic support for new style of SCHED_BATCH
policy.
-schedrange-1.diff
+schedrange-2.diff
Resync with change in scheduler policies available
-schedbatch-2.11.diff
Replaced with new SCHED_IDLEPRIO policy
-sched-iso3.3.patch
+sched-iso-4.1.patch
Updated SCHED_ISO unprivileged soft real time policy. This now is higher
priority than any SCHED_NORMAL tasks but lower priority than any true real
time tasks. The default cpu limit for iso tasks was changed to 80% (Note this
is set to 0 by default on the cks patchset so server admins would explicitly
set this only if desired).
-isobatch_ionice2.diff
+iso_idleprio_ionice.patch
-vm-mapped.diff
+vm-mapped-1.diff
-vm-background_scan-1.diff
-mm-highmem_fix_background_scan.patch
+mm-background_scan.patch
-mm-prio_dependant_scan.patch
-mm-batch_prio.patch
+mm-prio_dependant_scan-1.patch
+mm-idleprio_prio.patch
Rename/resync/rollups
-mm-swap_prefetch-28.patch
-mm-swap_prefetch-tweaks.patch
+mm-swap_prefetch-30.patch
+sp-resume1.patch
+mm-aggresive_swap_prefetch.patch
+swsusp-post_resume_aggressive_swap_prefetch.patch
Updated to the latest swap prefetch code which will perform swap prefetching
if low priority tasks are running. This also adds the optional "use once"
feature of aggressive swap prefetching, and makes swsusp use that setting on
resume from disk which improves dramatically the immediate interactivity of a
machine just after resume. See Documentation/sysctl/vm.txt for more info on
the tunable
-2615ck7-version.patch
+2.6.16-ck1-version.patch
Version update
Full patchlist:
sched-implement-smpnice.patch
sched-smpnice-apply-review-suggestions.patch
sched-smpnice-fix-average-load-per-run-queue-calculations.patch
sched-store-weighted-load-on-up.patch
sched-add-discrete-weighted-cpu-load-function.patch
sched-add-above-background-load-function.patch
sched-staircase14.2.patch
sched-generic_optims2.patch
schedrange-2.diff
sched-iso-4.1.patch
sched-idleprio-1.2.patch
defaultcfq.diff
iso_idleprio_ionice.patch
rt_ionice.diff
pdflush-tweaks.patch
hz-default_values.patch
hz-no_default_250.patch
mm-swap_prefetch-30.patch
vm-mapped-1.diff
vm-lots_watermark.diff
mm-background_scan.patch
mm-kswapd_inherit_prio-1.patch
mm-prio_dependant_scan-1.patch
mm-idleprio_prio.patch
sp-resume1.patch
mm-aggresive_swap_prefetch.patch
swsusp-post_resume_aggressive_swap_prefetch.patch
adaptive-readahead-11.patch
2.6.16-ck1-version.patch
Cheers,
Con
Good job Con, on your patches.. As far as the kernel in general, I'd
like to post some warnings:
Adaptive readahead: I had probs with this before, and I still do.. On
a desktop if you have odd problems (nothing responding for SECONDS,
very slow disk I/O during heavy I/O, etc..) disable it.
The new Yukon2 "sky2" driver: This one really pissed me off. It had me
thinking apache2 AND my linksys router we're on the brink. For some
unknown reason at least for me, in FF it would only half-load some
pages, including ones on localhost AND my router (10.1.1.1) ... I
dunno what the hell is up with this one. I have to stay with the
syskonnect.com sk98lin patch, which.. doesn't work with 2.6.16 so I am
back to 2.6.15 at the moment.
nVidia drivers: Broken. I posted a ftbfs bug on the debian bts, here
is a current patch that works against the current release:
http://bugs.debian.org/cgi-bin/bugreport.cgi/nvidia-kernel-source_1.0.8178-2.diff?bug=357992;msg=15;att=1
All in all, my experience sucked for the first time on this kernel.
Good luck with this new one..
-r
--
Rodney "meff" Gordon II -*- [email protected]
Systems Administrator / Coder Geek -*- Open yourself to OpenSource
Hi Rodney,
Thanks for your testing :)
On Thu, Mar 23, 2006 at 05:31:18AM -0600, Rodney Gordon II wrote:
> Adaptive readahead: I had probs with this before, and I still do.. On
> a desktop if you have odd problems (nothing responding for SECONDS,
> very slow disk I/O during heavy I/O, etc..) disable it.
Your problem on I/O latency with ara can be tracked down with the help
of Ingo's latency tracing patch. It goes like this:
1) download
http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.16.tar.bz2
http://www.vanheusden.com/ara/adaptive-readahead-11-2.6.16-rc6.patch.gz
http://people.redhat.com/mingo/latency-tracing-patches/latency-tracing-v2.6.16.patch
2)
tar jxf linux-2.6.16.tar.bz2
gunzip adaptive-readahead-11-2.6.16-rc6.patch.gz
cd linux-2.6.16
patch -p1 < ../adaptive-readahead-11-2.6.16-rc6.patch
patch -p1 < ../latency-tracing-v2.6.16.patch
3) compile kernel with Adaptive readahead support
4) boot with the new kernel, and run
echo 0 > /proc/sys/kernel/preempt_max_latency
5) feel some latency problems
6) report the content of /proc/latency_trace
Thanks,
Wu
On Thu, Mar 23, 2006 at 09:14:39PM +0800, Wu Fengguang wrote:
> Hi Rodney,
>
> Thanks for your testing :)
>
> On Thu, Mar 23, 2006 at 05:31:18AM -0600, Rodney Gordon II wrote:
> > Adaptive readahead: I had probs with this before, and I still do.. On
> > a desktop if you have odd problems (nothing responding for SECONDS,
> > very slow disk I/O during heavy I/O, etc..) disable it.
>
> Your problem on I/O latency with ara can be tracked down with the help
> of Ingo's latency tracing patch. It goes like this:
>
> 1) download
> http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.16.tar.bz2
> http://www.vanheusden.com/ara/adaptive-readahead-11-2.6.16-rc6.patch.gz
> http://people.redhat.com/mingo/latency-tracing-patches/latency-tracing-v2.6.16.patch
>
> 2)
> tar jxf linux-2.6.16.tar.bz2
> gunzip adaptive-readahead-11-2.6.16-rc6.patch.gz
> cd linux-2.6.16
> patch -p1 < ../adaptive-readahead-11-2.6.16-rc6.patch
> patch -p1 < ../latency-tracing-v2.6.16.patch
>
> 3) compile kernel with Adaptive readahead support
> 4) boot with the new kernel, and run
> echo 0 > /proc/sys/kernel/preempt_max_latency
> 5) feel some latency problems
> 6) report the content of /proc/latency_trace
>
> Thanks,
> Wu
Will try this as soon as I can get some net drivers working under
2.6.16 ...
-r
--
Rodney "meff" Gordon II -*- [email protected]
Systems Administrator / Coder Geek -*- Open yourself to OpenSource