From: Fenghua Yu Date: Wed, 20 Dec 2017 22:57:20 +0000 (-0800) Subject: x86/intel_rdt: Add L2CDP support in documentation X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=aa55d5a4bd919f26fce519c470d11a58541c6aa7;p=linux.git x86/intel_rdt: Add L2CDP support in documentation L2 and L3 Code and Data Prioritization (CDP) can be enabled separately. The existing mount parameter "cdp" is only for enabling L3 CDP and will be kept for backwards compability. Add a new mount parameter 'cdpl2' for L2 CDP. [ tglx: Made changelog readable ] Signed-off-by: Fenghua Yu Signed-off-by: Thomas Gleixner Cc: "Ravi V Shankar" Cc: "Tony Luck" Cc: Vikas" Cc: Sai Praneeth" Cc: Reinette" Link: https://lkml.kernel.org/r/1513810644-78015-3-git-send-email-fenghua.yu@intel.com --- diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt index 1ad77b1e3e797..756fd76b78a6f 100644 --- a/Documentation/x86/intel_rdt_ui.txt +++ b/Documentation/x86/intel_rdt_ui.txt @@ -10,18 +10,21 @@ This feature is enabled by the CONFIG_INTEL_RDT Kconfig and the 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 (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.