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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 02:48:22 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 02:48:22 +0100 |
| commit | f0b13428c95da67bbf77915e320030d9f18e7fcc (patch) | |
| tree | 3583026263af738e99c021655e8ae2547c2f068c /Documentation/x86 | |
| parent | Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
| parent | x86/intel_rdt: Add command line parameter to control L2_CDP (diff) | |
| download | linux-f0b13428c95da67bbf77915e320030d9f18e7fcc.tar.xz linux-f0b13428c95da67bbf77915e320030d9f18e7fcc.zip | |
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/cache updates from Thomas Gleixner:
"A set of patches which add support for L2 cache partitioning to the
Intel RDT facility"
* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/intel_rdt: Add command line parameter to control L2_CDP
x86/intel_rdt: Enable L2 CDP in MSR IA32_L2_QOS_CFG
x86/intel_rdt: Add two new resources for L2 Code and Data Prioritization (CDP)
x86/intel_rdt: Enumerate L2 Code and Data Prioritization (CDP) feature
x86/intel_rdt: Add L2CDP support in documentation
x86/intel_rdt: Update documentation
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/intel_rdt_ui.txt | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt index 6851854cf69d..756fd76b78a6 100644 --- a/Documentation/x86/intel_rdt_ui.txt +++ b/Documentation/x86/intel_rdt_ui.txt @@ -7,15 +7,24 @@ Tony Luck <tony.luck@intel.com> Vikas Shivappa <vikas.shivappa@intel.com> This feature is enabled by the CONFIG_INTEL_RDT Kconfig and the -X86 /proc/cpuinfo flag bits "rdt", "cqm", "cat_l3" and "cdp_l3". +X86 /proc/cpuinfo flag bits: +RDT (Resource Director Technology) Allocation - "rdt_a" +CAT (Cache Allocation Technology) - "cat_l3", "cat_l2" +CDP (Code and Data Prioritization ) - "cdp_l3", "cdp_l2" +CQM (Cache QoS Monitoring) - "cqm_llc", "cqm_occup_llc" +MBM (Memory Bandwidth Monitoring) - "cqm_mbm_total", "cqm_mbm_local" +MBA (Memory Bandwidth Allocation) - "mba" To use the feature mount the file system: - # mount -t resctrl resctrl [-o cdp] /sys/fs/resctrl + # mount -t resctrl resctrl [-o cdp[,cdpl2]] /sys/fs/resctrl mount options are: "cdp": Enable code/data prioritization in L3 cache allocations. +"cdpl2": Enable code/data prioritization in L2 cache allocations. + +L2 and L3 CDP are controlled seperately. RDT features are orthogonal. A particular system may support only monitoring, only control, or both monitoring and control. |