/*-
* 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
* * 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
#include "eal_private.h"
#include "eal_filesystem.h"
+#include "eal_thread.h"
#define SYS_CPU_DIR "/sys/devices/system/cpu/cpu%u"
#define CORE_ID_FILE "topology/core_id"
-#define PHYS_PKG_FILE "topology/physical_package_id"
+#define NUMA_NODE_PATH "/sys/devices/system/node"
/* Check if a cpu is present by the presence of the cpu information for it */
static int
cpu_detected(unsigned lcore_id)
{
char path[PATH_MAX];
- int len = rte_snprintf(path, sizeof(path), SYS_CPU_DIR
+ int len = snprintf(path, sizeof(path), SYS_CPU_DIR
"/"CORE_ID_FILE, lcore_id);
if (len <= 0 || (unsigned)len >= sizeof(path))
return 0;
return 1;
}
-/* Get CPU socket id (NUMA node) by reading directory
- * /sys/devices/system/cpu/cpuX looking for symlink "nodeY"
- * which gives the NUMA topology information.
- * Note: physical package id != NUMA node, but we use it as a
- * fallback for kernels which don't create a nodeY link
+/*
+ * Get CPU socket id (NUMA node) for a logical core.
+ *
+ * This searches each nodeX directories in /sys for the symlink for the given
+ * lcore_id and returns the numa node where the lcore is found. If lcore is not
+ * found on any numa node, returns zero.
*/
-static unsigned
-cpu_socket_id(unsigned lcore_id)
+unsigned
+eal_cpu_socket_id(unsigned lcore_id)
{
- const char node_prefix[] = "node";
- const size_t prefix_len = sizeof(node_prefix) - 1;
- char path[PATH_MAX];
- DIR *d;
- unsigned long id = 0;
- struct dirent *e;
- char *endptr = NULL;
-
- int len = rte_snprintf(path, sizeof(path),
- SYS_CPU_DIR, lcore_id);
- if (len <= 0 || (unsigned)len >= sizeof(path))
- goto err;
+ unsigned socket;
- d = opendir(path);
- if (!d)
- goto err;
+ for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
+ char path[PATH_MAX];
- while ((e = readdir(d)) != NULL) {
- if (strncmp(e->d_name, node_prefix, prefix_len) == 0) {
- id = strtoul(e->d_name+prefix_len, &endptr, 0);
- break;
- }
+ snprintf(path, sizeof(path), "%s/node%u/cpu%u", NUMA_NODE_PATH,
+ socket, lcore_id);
+ if (access(path, F_OK) == 0)
+ return socket;
}
- closedir(d);
- if (endptr == NULL || *endptr!='\0' || endptr == e->d_name+prefix_len) {
- RTE_LOG(WARNING, EAL, "Cannot read numa node link "
- "for lcore %u - using physical package id instead\n",
- lcore_id);
-
- len = rte_snprintf(path, sizeof(path), SYS_CPU_DIR "/%s",
- lcore_id, PHYS_PKG_FILE);
- if (len <= 0 || (unsigned)len >= sizeof(path))
- goto err;
- if (eal_parse_sysfs_value(path, &id) != 0)
- goto err;
- }
- return (unsigned)id;
-
-err:
- RTE_LOG(ERR, EAL, "Error getting NUMA socket information from %s "
- "for lcore %u - assuming NUMA socket 0\n", SYS_CPU_DIR, lcore_id);
return 0;
}
char path[PATH_MAX];
unsigned long id;
- int len = rte_snprintf(path, sizeof(path), SYS_CPU_DIR "/%s", lcore_id, CORE_ID_FILE);
+ int len = snprintf(path, sizeof(path), SYS_CPU_DIR "/%s", lcore_id, CORE_ID_FILE);
if (len <= 0 || (unsigned)len >= sizeof(path))
goto err;
if (eal_parse_sysfs_value(path, &id) != 0)
* ones and enable them by default.
*/
for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+ /* 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 = cpu_detected(lcore_id);
if (lcore_config[lcore_id].detected == 0) {
config->lcore_role[lcore_id] = ROLE_OFF;
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 = cpu_core_id(lcore_id);
- lcore_config[lcore_id].socket_id = cpu_socket_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;
}
/* 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;
}
git.droids-corp.org / dpdk.git / blobdiff