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| author | Jiri Olsa <jolsa@redhat.com> | 2017-04-10 16:52:32 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-10 19:10:25 +0200 |
| commit | 4ffa3c977b5da2907eb294dc6d0259a02f2284aa (patch) | |
| tree | 7267158eb409425c430d92efcfd529757ed436cb /Documentation | |
| parent | 17f8ba1dca072ce66c25b9e74ea2500b029594a0 (diff) | |
| download | linux-stable-4ffa3c977b5da2907eb294dc6d0259a02f2284aa.tar.gz linux-stable-4ffa3c977b5da2907eb294dc6d0259a02f2284aa.tar.bz2 linux-stable-4ffa3c977b5da2907eb294dc6d0259a02f2284aa.zip | |
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')
| -rw-r--r-- | Documentation/x86/intel_rdt_ui.txt | 3 |
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. |