vlib: revert automatic core pinning changes

[vpp.git] / src / vppinfra / unix-misc.c

diff --git a/src/vppinfra/unix-misc.c b/src/vppinfra/unix-misc.c
index 6a7328b..5008f82 100644 (file)
--- a/src/vppinfra/unix-misc.c
+++ b/src/vppinfra/unix-misc.c
@@ -37,8 +37,15 @@
 
 #include <vppinfra/error.h>
 #include <vppinfra/os.h>
+#include <vppinfra/bitmap.h>
 #include <vppinfra/unix.h>
 #include <vppinfra/format.h>
+#ifdef __linux__
+#include <vppinfra/linux/sysfs.h>
+#elif defined(__FreeBSD__)
+#include <sys/sysctl.h>
+#include <sys/param.h>
+#endif
 
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -260,6 +267,91 @@ os_get_nthreads (void)
   return 1;
 }
 
+__clib_export clib_bitmap_t *
+os_get_online_cpu_core_bitmap ()
+{
+#if __linux__
+  return clib_sysfs_read_bitmap ("/sys/devices/system/cpu/online");
+#else
+  return 0;
+#endif
+}
+
+__clib_export clib_bitmap_t *
+os_get_online_cpu_node_bitmap ()
+{
+#if __linux__
+  return clib_sysfs_read_bitmap ("/sys/devices/system/node/online");
+#else
+  return 0;
+#endif
+}
+__clib_export clib_bitmap_t *
+os_get_cpu_on_node_bitmap (int node)
+{
+#if __linux__
+  return clib_sysfs_read_bitmap ("/sys/devices/system/node/node%u/cpulist",
+                                node);
+#else
+  return 0;
+#endif
+}
+
+__clib_export clib_bitmap_t *
+os_get_cpu_with_memory_bitmap ()
+{
+#if __linux__
+  return clib_sysfs_read_bitmap ("/sys/devices/system/node/has_memory");
+#else
+  return 0;
+#endif
+}
+
+__clib_export int
+os_get_cpu_phys_core_id (int cpu_id)
+{
+#if __linux
+  int core_id = -1;
+  clib_error_t *err;
+  u8 *p;
+
+  p =
+    format (0, "/sys/devices/system/cpu/cpu%u/topology/core_id%c", cpu_id, 0);
+  err = clib_sysfs_read ((char *) p, "%d", &core_id);
+  vec_free (p);
+  if (err)
+    {
+      clib_error_free (err);
+      return -1;
+    }
+  return core_id;
+#else
+  return -1;
+#endif
+}
+
+__clib_export u8 *
+os_get_exec_path ()
+{
+  u8 *rv = 0;
+#ifdef __linux__
+  char tmp[PATH_MAX];
+  ssize_t sz = readlink ("/proc/self/exe", tmp, sizeof (tmp));
+
+  if (sz <= 0)
+    return 0;
+#else
+  char tmp[MAXPATHLEN];
+  int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+  size_t sz = MAXPATHLEN;
+
+  if (sysctl (mib, 4, tmp, &sz, NULL, 0) == -1)
+    return 0;
+#endif
+  vec_add (rv, tmp, sz);
+  return rv;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *