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-rw-r--r--src/vlib/unix/util.c113
1 files changed, 104 insertions, 9 deletions
diff --git a/src/vlib/unix/util.c b/src/vlib/unix/util.c
index 312cc9b5a0a..0e252aca345 100644
--- a/src/vlib/unix/util.c
+++ b/src/vlib/unix/util.c
@@ -189,37 +189,132 @@ vlib_sysfs_link_to_name (char *link)
return s;
}
-int
-vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size)
+clib_error_t *
+vlib_sysfs_set_nr_hugepages (unsigned int numa_node, int page_size, int nr)
{
+ clib_error_t *error = 0;
struct stat sb;
u8 *p = 0;
- int r = -1;
p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
if (stat ((char *) p, &sb) == 0)
{
if (S_ISDIR (sb.st_mode) == 0)
- goto done;
+ {
+ error = clib_error_return (0, "'%s' is not directory", p);
+ goto done;
+ }
}
else if (numa_node == 0)
{
vec_reset_length (p);
p = format (p, "/sys/kernel/mm%c", 0);
if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
- goto done;
+ {
+ error = clib_error_return (0, "'%s' does not exist or it is not "
+ "directory", p);
+ goto done;
+ }
}
else
- goto done;
+ {
+ error = clib_error_return (0, "'%s' does not exist", p);
+ goto done;
+ }
_vec_len (p) -= 1;
- p = format (p, "/hugepages/hugepages-%ukB/free_hugepages%c", page_size, 0);
- vlib_sysfs_read ((char *) p, "%d", &r);
+ p = format (p, "/hugepages/hugepages-%ukB/nr_hugepages%c", page_size, 0);
+ vlib_sysfs_write ((char *) p, "%d", nr);
done:
vec_free (p);
- return r;
+ return error;
+}
+
+
+static clib_error_t *
+vlib_sysfs_get_xxx_hugepages (char *type, unsigned int numa_node,
+ int page_size, int *val)
+{
+ clib_error_t *error = 0;
+ struct stat sb;
+ u8 *p = 0;
+
+ p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
+
+ if (stat ((char *) p, &sb) == 0)
+ {
+ if (S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' is not directory", p);
+ goto done;
+ }
+ }
+ else if (numa_node == 0)
+ {
+ vec_reset_length (p);
+ p = format (p, "/sys/kernel/mm%c", 0);
+ if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' does not exist or it is not "
+ "directory", p);
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "'%s' does not exist", p);
+ goto done;
+ }
+
+ _vec_len (p) -= 1;
+ p = format (p, "/hugepages/hugepages-%ukB/%s_hugepages%c", page_size,
+ type, 0);
+ error = vlib_sysfs_read ((char *) p, "%d", val);
+
+done:
+ vec_free (p);
+ return error;
+}
+
+clib_error_t *
+vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size, int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("free", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_get_nr_hugepages (unsigned int numa_node, int page_size, int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("nr", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_get_surplus_hugepages (unsigned int numa_node, int page_size,
+ int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("surplus", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_prealloc_hugepages (unsigned int numa_node, int page_size, int nr)
+{
+ clib_error_t *error = 0;
+ int n, needed;
+ error = vlib_sysfs_get_free_hugepages (numa_node, page_size, &n);
+ if (error)
+ return error;
+ needed = nr - n;
+ if (needed <= 0)
+ return 0;
+
+ error = vlib_sysfs_get_nr_hugepages (numa_node, page_size, &n);
+ if (error)
+ return error;
+ clib_warning ("pre-allocating %u additional %uK hugepages on numa node %u",
+ needed, page_size, numa_node);
+ return vlib_sysfs_set_nr_hugepages (numa_node, page_size, n + needed);
}
clib_error_t *