eal: set affinity for control threads

[dpdk.git] / lib / librte_eal / common / eal_common_cpuflags.c

diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
index 6fd360c..9a2d080 100644 (file)
--- a/lib/librte_eal/common/eal_common_cpuflags.c
+++ b/lib/librte_eal/common/eal_common_cpuflags.c
@@ -30,56 +30,50 @@
  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-#include <rte_cpuflags.h>
 
-/*
- * This should prevent use of advanced instruction sets in this file. Otherwise
- * the check function itself could cause a crash.
- */
-#ifdef __INTEL_COMPILER
-#pragma optimize ("", off)
-#else
-#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
-#if GCC_VERSION > 404000
-#pragma GCC optimize ("O0")
-#endif
-#endif
+#include <stdio.h>
+
+#include <rte_common.h>
+#include <rte_cpuflags.h>
 
 /**
  * Checks if the machine is adequate for running the binary. If it is not, the
  * program exits with status 1.
- * The function attribute forces this function to be called before main(). But
- * with ICC, the check is generated by the compiler.
  */
-#ifndef __INTEL_COMPILER
-void __attribute__ ((__constructor__))
-#else
 void
-#endif
 rte_cpu_check_supported(void)
+{
+       if (!rte_cpu_is_supported())
+               exit(1);
+}
+
+int
+rte_cpu_is_supported(void)
 {
        /* This is generated at compile-time by the build system */
        static const enum rte_cpu_flag_t compile_time_flags[] = {
                        RTE_COMPILE_TIME_CPUFLAGS
        };
-       unsigned i;
+       unsigned count = RTE_DIM(compile_time_flags), i;
        int ret;
 
-       for (i = 0; i < sizeof(compile_time_flags)/sizeof(compile_time_flags[0]); i++) {
+       for (i = 0; i < count; i++) {
                ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
 
                if (ret < 0) {
                        fprintf(stderr,
                                "ERROR: CPU feature flag lookup failed with error %d\n",
                                ret);
-                       exit(1);
+                       return 0;
                }
                if (!ret) {
                        fprintf(stderr,
                                "ERROR: This system does not support \"%s\".\n"
                                "Please check that RTE_MACHINE is set correctly.\n",
-                               cpu_feature_table[compile_time_flags[i]].name);
-                       exit(1);
+                               rte_cpu_get_flag_name(compile_time_flags[i]));
+                       return 0;
                }
        }
+
+       return 1;
 }