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-rw-r--r--src/vppinfra/unix-misc.c31
-rw-r--r--src/vppinfra/unix.h3
2 files changed, 34 insertions, 0 deletions
diff --git a/src/vppinfra/unix-misc.c b/src/vppinfra/unix-misc.c
index e0591ff4604..4dbc5ce98ce 100644
--- a/src/vppinfra/unix-misc.c
+++ b/src/vppinfra/unix-misc.c
@@ -46,6 +46,7 @@
#include <sys/stat.h>
#include <sys/types.h>
+#include <sys/syscall.h>
#include <sys/uio.h> /* writev */
#include <fcntl.h>
#include <stdio.h> /* for sprintf */
@@ -275,6 +276,36 @@ os_get_online_cpu_core_bitmap ()
}
__clib_export clib_bitmap_t *
+os_get_cpu_affinity_bitmap (int pid)
+{
+#if __linux
+ int index, ret;
+ cpu_set_t cpuset;
+ uword *affinity_cpus;
+
+ clib_bitmap_alloc (affinity_cpus, sizeof (cpu_set_t));
+ clib_bitmap_zero (affinity_cpus);
+
+ __CPU_ZERO_S (sizeof (cpu_set_t), &cpuset);
+
+ ret = syscall (SYS_sched_getaffinity, 0, sizeof (cpu_set_t), &cpuset);
+
+ if (ret < 0)
+ {
+ clib_bitmap_free (affinity_cpus);
+ return 0;
+ }
+
+ for (index = 0; index < sizeof (cpu_set_t); index++)
+ if (__CPU_ISSET_S (index, sizeof (cpu_set_t), &cpuset))
+ clib_bitmap_set (affinity_cpus, index, 1);
+ return affinity_cpus;
+#else
+ return 0;
+#endif
+}
+
+__clib_export clib_bitmap_t *
os_get_online_cpu_node_bitmap ()
{
#if __linux__
diff --git a/src/vppinfra/unix.h b/src/vppinfra/unix.h
index 651f9bb99e0..3ad57b05e72 100644
--- a/src/vppinfra/unix.h
+++ b/src/vppinfra/unix.h
@@ -56,6 +56,9 @@ clib_error_t *unix_proc_file_contents (char *file, u8 ** result);
/* Retrieve bitmap of online cpu cures */
clib_bitmap_t *os_get_online_cpu_core_bitmap ();
+/* Retrieve bitmap of cpus vpp has affinity to */
+clib_bitmap_t *os_get_cpu_affinity_bitmap (int pid);
+
/* Retrieve bitmap of online cpu nodes (sockets) */
clib_bitmap_t *os_get_online_cpu_node_bitmap ();