Messages in this thread | | | Date | Mon, 27 Feb 2012 13:53:26 +0100 | From | Stephan Bärwolf <> | Subject | [PATCH 00/10] scheduler-ticker > 1000Hz, nitromethane for linux ;-) |
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Hi all,
this is a not fully serious (this is why I only post it here without sendig it directly via mail) patchset for:
* tune the scheduler at configuration point * increase the ticker-frequency way above 1000Hz * tune the ticker-freq. from userspace during runtime
Of course this increases your systems overhead, but it enables you to have more timer-triggered contexswitches per second and so (?)higher(?) interactivity. (Of course after tuning some scheduler-parameters, min_gran, wakeup_gran ...)
An interesting feature might be the userspace controlling of the tickerfreq, too. (Without disturbing HZ-dependend kernelcode, of course.)
I don't have very high hopes for an mainline integration ;-) but perhaps there are people, who want to play with such stuff. The Code is more or less an excerise and perhaps some reviewing would be nice - so please contact me. If (in the very unlikely case) there is enough interest in it, I can cleanup the code and start maintaining it...
* The patch is diffed against 3.2.7 * The whole patchset is also downloadable as an bzipped archive at: http://www.matrixstorm.com/software/linux/nitromethane/linux-3.2.7-patches.tar.bz2
So now, please blame me "we don't need such s*it, it causes only overhead"... ;-)
regards Stephan
pub 4096R/FB9B12DB 2011-10-14 Stephan Bärwolf <stephan.baerwolf@tu-ilmenau.de> Primary key fingerprint: 2252 B41E 12DF 41AD 476F 7F36 084A 0911 FB9B 12DB
Stephan Baerwolf (10): menuconfig: implement new submenu for extended scheduler-options sched: implement the new menuconfig controlling of sched_tunables menuconfig: extend nitro-menu by responsiveness nitro options sched: implement the controlling of responsiveness-nitro-options menuconfig: extend nitro-menu by HZ-frequency Nitro hrtimer: implement the controlling of nitro-hzboost menuconfig: extend nitro-menu by priority-nitro sched: implement the controlling of priority-nitro menuconfig: extend nitro-menu by userspace-multiplier hrtimer/sysctl: implement the controlling of userspace multiplier
arch/x86/Kconfig | 4 +- include/linux/sched.h | 8 ++ kernel/Kconfig.hz | 3 - kernel/Kconfig.sched | 202 +++++++++++++++++++++++++++++++++++++++++++ kernel/sched.c | 9 ++ kernel/sched_fair.c | 58 +++++++++++-- kernel/sysctl.c | 16 ++++ kernel/time/tick-common.c | 33 +++++++ kernel/time/tick-internal.h | 20 ++++ kernel/time/tick-sched.c | 51 +++++++++++ 10 files changed, 390 insertions(+), 14 deletions(-) create mode 100644 kernel/Kconfig.sched
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