Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / common / eal_common_lcore.c

diff --git a/lib/librte_eal/common/eal_common_lcore.c b/lib/librte_eal/common/eal_common_lcore.c
new file mode 100644 (file)
index 0000000..a4263ba
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_lcore.c
@@ -0,0 +1,110 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (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 <unistd.h>
+#include <limits.h>
+#include <string.h>
+#include <dirent.h>
+
+#include <rte_log.h>
+#include <rte_eal.h>
+#include <rte_lcore.h>
+#include <rte_common.h>
+#include <rte_debug.h>
+
+#include "eal_private.h"
+#include "eal_thread.h"
+
+/*
+ * Parse /sys/devices/system/cpu to get the number of physical and logical
+ * processors on the machine. The function will fill the cpu_info
+ * structure.
+ */
+int
+rte_eal_cpu_init(void)
+{
+       /* pointer to global configuration */
+       struct rte_config *config = rte_eal_get_configuration();
+       unsigned lcore_id;
+       unsigned count = 0;
+
+       /*
+        * Parse the maximum set of logical cores, detect the subset of running
+        * ones and enable them by default.
+        */
+       for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+               lcore_config[lcore_id].core_index = count;
+
+               /* init cpuset for per lcore config */
+               CPU_ZERO(&lcore_config[lcore_id].cpuset);
+
+               /* in 1:1 mapping, record related cpu detected state */
+               lcore_config[lcore_id].detected = eal_cpu_detected(lcore_id);
+               if (lcore_config[lcore_id].detected == 0) {
+                       config->lcore_role[lcore_id] = ROLE_OFF;
+                       lcore_config[lcore_id].core_index = -1;
+                       continue;
+               }
+
+               /* By default, lcore 1:1 map to cpu id */
+               CPU_SET(lcore_id, &lcore_config[lcore_id].cpuset);
+
+               /* By default, each detected core is enabled */
+               config->lcore_role[lcore_id] = ROLE_RTE;
+               lcore_config[lcore_id].core_id = eal_cpu_core_id(lcore_id);
+               lcore_config[lcore_id].socket_id = eal_cpu_socket_id(lcore_id);
+               if (lcore_config[lcore_id].socket_id >= RTE_MAX_NUMA_NODES)
+#ifdef RTE_EAL_ALLOW_INV_SOCKET_ID
+                       lcore_config[lcore_id].socket_id = 0;
+#else
+                       rte_panic("Socket ID (%u) is greater than "
+                               "RTE_MAX_NUMA_NODES (%d)\n",
+                               lcore_config[lcore_id].socket_id,
+                               RTE_MAX_NUMA_NODES);
+#endif
+
+               RTE_LOG(DEBUG, EAL, "Detected lcore %u as "
+                               "core %u on socket %u\n",
+                               lcore_id, lcore_config[lcore_id].core_id,
+                               lcore_config[lcore_id].socket_id);
+               count++;
+       }
+       /* Set the count of enabled logical cores of the EAL configuration */
+       config->lcore_count = count;
+       RTE_LOG(DEBUG, EAL,
+               "Support maximum %u logical core(s) by configuration.\n",
+               RTE_MAX_LCORE);
+       RTE_LOG(DEBUG, EAL, "Detected %u lcore(s)\n", config->lcore_count);
+
+       return 0;
+}