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authorJiri Olsa <jolsa@redhat.com>2017-04-10 16:52:32 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-04-10 19:10:25 +0200
commit4ffa3c977b5da2907eb294dc6d0259a02f2284aa (patch)
tree7267158eb409425c430d92efcfd529757ed436cb /Documentation/x86/intel_rdt_ui.txt
parent17f8ba1dca072ce66c25b9e74ea2500b029594a0 (diff)
x86/intel_rdt: Add cpus_list rdtgroup file
The resource control filesystem provides only a bitmask based cpus file for assigning CPUs to a resource group. That's cumbersome with large cpumasks and non-intuitive when modifying the file from the command line. Range based cpu lists are commonly used along with bitmask based cpu files in various subsystems throughout the kernel. Add 'cpus_list' file which is CPU range based. # cd /sys/fs/resctrl/ # echo 1-10 > krava/cpus_list # cat krava/cpus_list 1-10 # cat krava/cpus 0007fe # cat cpus fffff9 # cat cpus_list 0,3-23 [ tglx: Massaged changelog and replaced "bitmask lists" by "CPU ranges" ] Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Shaohua Li <shli@fb.com> Link: http://lkml.kernel.org/r/20170410145232.GF25354@krava Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/x86/intel_rdt_ui.txt')
-rw-r--r--Documentation/x86/intel_rdt_ui.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt
index 3ea198460469..a1ace91c4b86 100644
--- a/Documentation/x86/intel_rdt_ui.txt
+++ b/Documentation/x86/intel_rdt_ui.txt
@@ -59,6 +59,9 @@ There are three files associated with each group:
given to the default (root) group. You cannot remove CPUs
from the default group.
+"cpus_list": One or more CPU ranges of logical CPUs assigned to this
+ group. Same rules apply like for the "cpus" file.
+
"schemata": A list of all the resources available to this group.
Each resource has its own line and format - see below for
details.