diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-11-12 18:57:33 -0600 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-11-22 11:37:21 +0100 |
| commit | 77b662326200135fe72cedc47fb1b0e5679d604d (patch) | |
| tree | 135b5ca85a3ae13d0dd72a1c64911317e6886793 /fs/resctrl/internal.h | |
| parent | 9445c7059c1c3b097ec8e924eb374df84770bee5 (diff) | |
fs/resctrl: Introduce interface to display io_alloc CBMs
Introduce the "io_alloc_cbm" resctrl file to display the capacity bitmasks
(CBMs) that represent the portions of each cache instance allocated
for I/O traffic on a cache resource that supports the "io_alloc" feature.
io_alloc_cbm resides in the info directory of a cache resource, for example,
/sys/fs/resctrl/info/L3/. Since the resource name is part of the path, it
is not necessary to display the resource name as done in the schemata file.
When CDP is enabled, io_alloc routes traffic using the highest CLOSID
associated with the CDP_CODE resource and that CLOSID becomes unusable for
the CDP_DATA resource. The highest CLOSID of CDP_CODE and CDP_DATA resources
will be kept in sync to ensure consistent user interface. In preparation for
this, access the CBMs for I/O traffic through highest CLOSID of either
CDP_CODE or CDP_DATA resource.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://patch.msgid.link/55a3ff66a70e7ce8239f022e62b334e9d64af604.1762995456.git.babu.moger@amd.com
Diffstat (limited to 'fs/resctrl/internal.h')
| -rw-r--r-- | fs/resctrl/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h index 145e22f9a350..779a575e0828 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -438,6 +438,8 @@ ssize_t resctrl_io_alloc_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off); const char *rdtgroup_name_by_closid(u32 closid); +int resctrl_io_alloc_cbm_show(struct kernfs_open_file *of, struct seq_file *seq, + void *v); #ifdef CONFIG_RESCTRL_FS_PSEUDO_LOCK int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp); |