diff options
| author | Tony Luck <tony.luck@intel.com> | 2024-12-06 08:31:47 -0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-12-12 11:27:37 +0100 |
| commit | 8e931105acae688ff0fc8f875a6c05e5aed8ab79 (patch) | |
| tree | 3ed0e53b602ea0ec9280fb8e484630a8d61e8883 /arch/x86/kernel/cpu/resctrl/internal.h | |
| parent | f5cd0e316f14d79c9eb0cf8fe7e60cee3a657aa8 (diff) | |
x86/resctrl: Add write option to "mba_MBps_event" file
The "mba_MBps" mount option provides an alternate method to control memory
bandwidth. Instead of specifying allowable bandwidth as a percentage of
maximum possible, the user provides a MiB/s limit value.
There is a file in each CTRL_MON group directory that shows the event
currently in use.
Allow writing that file to choose a different event.
A user can choose any of the memory bandwidth monitoring events listed in
/sys/fs/resctrl/info/L3_mon/mon_features independently for each CTRL_MON group
by writing to each of the "mba_MBps_event" files.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20241206163148.83828-8-tony.luck@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/resctrl/internal.h')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index 1bd61edbaf12..20c898f09b7e 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -610,6 +610,8 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off); int rdtgroup_schemata_show(struct kernfs_open_file *of, struct seq_file *s, void *v); +ssize_t rdtgroup_mba_mbps_event_write(struct kernfs_open_file *of, + char *buf, size_t nbytes, loff_t off); int rdtgroup_mba_mbps_event_show(struct kernfs_open_file *of, struct seq_file *s, void *v); bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_ctrl_domain *d, |