The irqbalance source tree - The new official site for irqbalance
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Neil Horman Neil Horman
Neil Horman and Neil Horman fix socket path creation
based on this bug:

It seems that setting the Temp file system to ro overly restricts access
to it such that other applications (like ssh), can't function properly.
That seems like a error to fix in systemd to me, but regardless we
obviously cant use TempDirectory=/path:ro if its going to impact other
applications like that.

Instead specify a specific RuntimeDirectory that systemd can clean up
for us, and modify irqbalance and irqbalance-ui to create the comms
socket there.

Signed-off-by: Neil Horman <>
Latest commit f5ca2eb Jan 14, 2019
Type Name Latest commit message Commit time
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misc fix socket path creation Jan 14, 2019
tests Add make check targets May 14, 2018
ui fix socket path creation Jan 14, 2019
.gitignore irqbalance: Misc build enhancements Mar 26, 2012
.travis.yml Dump the log to the console May 14, 2018
AUTHORS Add autotools scripts to irqbalance Sep 1, 2009
COPYING Adding missing configure files Oct 2, 2009 Add make check targets May 14, 2018 Adding Travis bagde Aug 4, 2017
activate.c remove affinity_hint infrastructure Apr 26, 2016 Make sure the m4 directory is created in Jun 20, 2012
bitmap.c import __bitmap_parselist from Linux kernel Mar 12, 2015
bitmap.h import __bitmap_parselist from Linux kernel Mar 12, 2015
classify.c policyscript: ignore non-executable files when specifying a directory Oct 12, 2018 Update to print latest version Oct 27, 2018
constants.h Compute load in nanoseconds Feb 18, 2013
cpumask.h fix cpulist_parse definition to match bitmap_parselist and kernel Mar 12, 2015
cputree.c Fix ambiguous parsing of *node* entries in /sys. Oct 18, 2018
irqbalance.1 Update document for option --banmod and --deepestcache Nov 9, 2018
irqbalance.c Remove hintpolicy related options in help message Nov 9, 2018
irqbalance.h fix socket path creation Jan 14, 2019
irqlist.c Fix min_load to pick actual min load across all objects Nov 15, 2017
non-atomic.h initial import Dec 9, 2006
numa.c Fix ambiguous parsing of *node* entries in /sys. Oct 18, 2018
placement.c remove affinity_hint infrastructure Apr 26, 2016
procinterrupts.c procinterrupts: check xen-dyn-event more flexible Oct 18, 2018
types.h Types: clean out unused variables from irq_info struct Aug 8, 2017

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 Build Status

./configure [options]
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:

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