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x86/resctrl: Add task resctrl information display
Monitoring tools that want to find out which resctrl control and monitor groups a task belongs to must currently read the "tasks" file in every group until they locate the process ID. Add an additional file /proc/{pid}/cpu_resctrl_groups to provide this information: 1) res: mon: resctrl is not available. 2) res:/ mon: Task is part of the root resctrl control group, and it is not associated to any monitor group. 3) res:/ mon:mon0 Task is part of the root resctrl control group and monitor group mon0. 4) res:group0 mon: Task is part of resctrl control group group0, and it is not associated to any monitor group. 5) res:group0 mon:mon1 Task is part of resctrl control group group0 and monitor group mon1. Signed-off-by:Chen Yu <yu.c.chen@intel.com> Signed-off-by:
Borislav Petkov <bp@suse.de> Tested-by:
Jinshi Chen <jinshi.chen@intel.com> Link: https://lkml.kernel.org/r/20200115092851.14761-1-yu.c.chen@intel.com
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- arch/x86/Kconfig 1 addition, 0 deletionsarch/x86/Kconfig
- arch/x86/kernel/cpu/resctrl/rdtgroup.c 86 additions, 0 deletionsarch/x86/kernel/cpu/resctrl/rdtgroup.c
- fs/proc/Kconfig 4 additions, 0 deletionsfs/proc/Kconfig
- fs/proc/base.c 7 additions, 0 deletionsfs/proc/base.c
- include/linux/resctrl.h 14 additions, 0 deletionsinclude/linux/resctrl.h
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