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Neil Horman 723c41c1ef Fix min_load to pick actual min load across all objects find_overloaded_objs() calls gather_load_stats() to get stats across all objects to help migrate overloaded IRQ's. There is a bug in gather_load_stats() to pick min_load across all objects when the first object's load is 0. Eg with 2 objects: obj1->load = 0 and obj2->load = 5000 During first iteration, info->min_load will be 0. However during second iteration, info->min_load will be 5000. This flaw in the logic doesn't allow IRQ's to be migrated as it ends up picking the overloaded core as the one with min load. Reviewed-by: Alakesh Haloi <alakeshh@amazon.com> Signed-off-by: Vallish Vaidyeshwara <vallish@amazon.com> Signed-off-by: Neil Horman <nhorman@tuxdriver.com>		2017-11-15 07:33:47 -05:00
misc	misc: add sample udev rule	2017-08-08 14:10:07 -04:00
ui	irqbalance: Fix the compile warning.	2017-08-19 18:57:55 +08:00
.gitignore	irqbalance: Misc build enhancements	2012-03-26 10:19:00 -04:00
.travis.yml	Add CI	2017-02-05 17:07:26 +01:00
activate.c	remove affinity_hint infrastructure	2016-04-26 14:55:55 -04:00
AUTHORS	Add autotools scripts to irqbalance	2009-09-01 15:50:39 +00:00
autogen.sh	Make sure the m4 directory is created in autogen.sh	2012-06-20 11:45:37 -04:00
bitmap.c	import __bitmap_parselist from Linux kernel	2015-03-12 17:47:00 -04:00
bitmap.h	import __bitmap_parselist from Linux kernel	2015-03-12 17:47:00 -04:00
classify.c	x86/x64: Exclude devices with legacy IRQ 255	2017-06-02 09:46:54 -05:00
configure.ac	Bumping release number	2017-11-13 09:26:09 -05:00
constants.h	Compute load in nanoseconds	2013-02-18 14:08:57 -05:00
COPYING	Adding missing configure files	2009-10-02 18:22:21 +00:00
cpumask.h	fix cpulist_parse definition to match bitmap_parselist and kernel	2015-03-12 17:47:00 -04:00
cputree.c	cputree: Cleanup unused variable	2017-08-08 14:39:10 -04:00
irqbalance.1	Add user interface to configuration and build, document socket API in man page	2017-01-03 08:48:42 -05:00
irqbalance.c	Fix some string sizing issues	2017-08-03 08:43:24 -04:00
irqbalance.h	Teach irqbalance about Intel CoD.	2017-07-11 09:21:04 -07:00
irqlist.c	Fix min_load to pick actual min load across all objects	2017-11-15 07:33:47 -05:00
Makefile.am	Add --without-irqbalance-ui option to configure	2017-08-03 11:49:08 -04:00
non-atomic.h	initial import	2006-12-09 15:59:16 +00:00
numa.c	Teach irqbalance about Intel CoD.	2017-07-11 09:21:04 -07:00
placement.c	remove affinity_hint infrastructure	2016-04-26 14:55:55 -04:00
procinterrupts.c	Update procinterrupts.c	2017-08-29 17:10:20 +08:00
README.md	Adding Travis bagde	2017-08-04 13:32:29 +02:00
types.h	Types: clean out unused variables from irq_info struct	2017-08-08 14:35:31 -04:00

README.md

What is Irqbalance

Irqbalance is a daemon to help balance the cpu load generated by interrupts across all of a systems cpus. Irqbalance identifies the highest volume interrupt sources, and isolates them to a single unique cpu, so that load is spread as much as possible over an entire processor set, while minimizing cache miss rates for irq handlers.

Building and Installing

./autogen.sh
./configure [options]
make
make install

Developing Irqbalance

Irqbalance is currently hosted on github, and so developers are welcome to use the issue/pull request/etc infrastructure found there. However, most development discussions take place on the irqbalance mailing list, which can be subscribed to at: http://lists.infradead.org/mailman/listinfo/irqbalance

New Developers are encouraged to use this mailing list to discuss ideas and propose patches.

Bug reporting

When something goes wrong, feel free to send us bugreport by one of the ways described above. Your report should include:

Irqbalance version you've been using (or commit hash)
/proc/interrupts output
irqbalance --debug output
content of smp_affinity files - can be obtained by e.g.: $ for i in $(seq 0 300); do grep . /proc/irq/$i/smp_affinity /dev/null 2>/dev/null; done
your hw hierarchy - e.g. lstopo-no-graphics output