39e6d14bdf
The calc_isolated_cores function expands to the list of cores to
isolate. It accepts optional argument which specifies how many cores
from each socket reserve for housekeeping. If not specified, one core
from each socket is reserved for housekeeping.
Example:
Machine with 2 sockets, each 4 cores, using the following user variable
configuration file, e.g. /etc/tuned/realtime-variables.conf:
isolated_cores=${f:calc_isolated_cores:2}
It will expand to:
isolated_cores=2, 3, 6, 7
I.e. cores 0, 1 and 4, 5 will be used for housekeeping.
Also updated the TuneD profiles to use this builtin function for
isolated_cores preset.
Resolves: rhbz#2093847
Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
25 lines
813 B
Text
25 lines
813 B
Text
#
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# Variable settings below override the definitions from the
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# /etc/tuned/realtime-variables.conf file.
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#
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# Examples:
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# isolated_cores=2,4-7
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# isolated_cores=2-23
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#
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# Reserve 1 core per socket for housekeeping, isolate the rest.
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isolated_cores=${f:calc_isolated_cores:1}
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# Uncomment the 'isolate_managed_irq=Y' bellow if you want to move kernel
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# managed IRQs out of isolated cores. Note that this requires kernel
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# support. Please only specify this parameter if you are sure that the
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# kernel supports it.
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#
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isolate_managed_irq=Y
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#
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# Set the desired combined queue count value using the parameter provided
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# below. Ideally this should be set to the number of housekeeping CPUs i.e.,
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# in the example given below it is assumed that the system has 4 housekeeping
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# (non-isolated) CPUs.
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#
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# netdev_queue_count=4
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