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From: Cunming Liang <cunming.liang@intel.com>
To: dev@dpdk.org
Date: Mon, 2 Feb 2015 10:02:28 +0800
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Subject: [dpdk-dev] [PATCH v4 06/17] eal: add eal_common_thread.c for common
thread API
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The API works for both EAL thread and none EAL thread.
When calling rte_thread_set_affinity, the *_socket_id* and
*_cpuset* of calling thread will be updated if the thread
successful set the cpu affinity.
Signed-off-by: Cunming Liang <cunming.liang@intel.com>
---
lib/librte_eal/bsdapp/eal/Makefile | 1 +
lib/librte_eal/common/eal_common_thread.c | 142 ++++++++++++++++++++++++++++++
lib/librte_eal/linuxapp/eal/Makefile | 2 +
3 files changed, 145 insertions(+)
create mode 100644 lib/librte_eal/common/eal_common_thread.c
diff --git a/lib/librte_eal/bsdapp/eal/Makefile b/lib/librte_eal/bsdapp/eal/Makefile
index d434882..78406be 100644
--- a/lib/librte_eal/bsdapp/eal/Makefile
+++ b/lib/librte_eal/bsdapp/eal/Makefile
@@ -73,6 +73,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_hexdump.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_devargs.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_dev.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_options.c
+SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_thread.c
CFLAGS_eal.o := -D_GNU_SOURCE
#CFLAGS_eal_thread.o := -D_GNU_SOURCE
diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c
new file mode 100644
index 0000000..d996690
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_thread.c
@@ -0,0 +1,142 @@
+/*-
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <sched.h>
+
+#include <rte_lcore.h>
+#include <rte_log.h>
+#include <rte_memcpy.h>
+
+#include "eal_thread.h"
+
+int
+rte_thread_set_affinity(rte_cpuset_t *cpusetp)
+{
+ int s;
+ unsigned lcore_id;
+ pthread_t tid;
+
+ if (!cpusetp)
+ return -1;
+
+ lcore_id = rte_lcore_id();
+ if (lcore_id != (unsigned)LCORE_ID_ANY) {
+ /* EAL thread */
+ tid = lcore_config[lcore_id].thread_id;
+
+ s = pthread_setaffinity_np(tid, sizeof(rte_cpuset_t), cpusetp);
+ if (s != 0) {
+ RTE_LOG(ERR, EAL, "pthread_setaffinity_np failed\n");
+ return -1;
+ }
+
+ /* store socket_id in TLS for quick access */
+ RTE_PER_LCORE(_socket_id) =
+ eal_cpuset_socket_id(cpusetp);
+
+ /* store cpuset in TLS for quick access */
+ rte_memcpy(&RTE_PER_LCORE(_cpuset), cpusetp,
+ sizeof(rte_cpuset_t));
+
+ /* update lcore_config */
+ lcore_config[lcore_id].socket_id = RTE_PER_LCORE(_socket_id);
+ rte_memcpy(&lcore_config[lcore_id].cpuset, cpusetp,
+ sizeof(rte_cpuset_t));
+ } else {
+ /* none EAL thread */
+ tid = pthread_self();
+
+ s = pthread_setaffinity_np(tid, sizeof(rte_cpuset_t), cpusetp);
+ if (s != 0) {
+ RTE_LOG(ERR, EAL, "pthread_setaffinity_np failed\n");
+ return -1;
+ }
+
+ /* store cpuset in TLS for quick access */
+ rte_memcpy(&RTE_PER_LCORE(_cpuset), cpusetp,
+ sizeof(rte_cpuset_t));
+
+ /* store socket_id in TLS for quick access */
+ RTE_PER_LCORE(_socket_id) =
+ eal_cpuset_socket_id(cpusetp);
+ }
+
+ return 0;
+}
+
+int
+rte_thread_get_affinity(rte_cpuset_t *cpusetp)
+{
+ if (!cpusetp)
+ return -1;
+
+ rte_memcpy(cpusetp, &RTE_PER_LCORE(_cpuset),
+ sizeof(rte_cpuset_t));
+
+ return 0;
+}
+
+void
+eal_thread_dump_affinity(char str[], unsigned size)
+{
+ rte_cpuset_t cpuset;
+ unsigned cpu;
+ int ret;
+ unsigned int out = 0;
+
+ if (rte_thread_get_affinity(&cpuset) < 0) {
+ str[0] = '\0';
+ return;
+ }
+
+ for (cpu = 0; cpu < RTE_MAX_LCORE; cpu++) {
+ if (!CPU_ISSET(cpu, &cpuset))
+ continue;
+
+ ret = snprintf(str + out,
+ size - out, "%u,", cpu);
+ if (ret < 0 || (unsigned)ret >= size - out)
+ break;
+
+ out += ret;
+ }
+
+ /* remove the last separator */
+ if (out > 0)
+ str[out - 1] = '\0';
+}
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 025d836..07e21ca 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -85,6 +85,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_hexdump.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_devargs.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_dev.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_options.c
+SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_thread.c
CFLAGS_eal.o := -D_GNU_SOURCE
CFLAGS_eal_lcore.o := -D_GNU_SOURCE
@@ -96,6 +97,7 @@ CFLAGS_eal_pci.o := -D_GNU_SOURCE
CFLAGS_eal_pci_vfio.o := -D_GNU_SOURCE
CFLAGS_eal_common_whitelist.o := -D_GNU_SOURCE
CFLAGS_eal_common_options.o := -D_GNU_SOURCE
+CFLAGS_eal_common_thread.o := -D_GNU_SOURCE
# workaround for a gcc bug with noreturn attribute
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
--
1.8.1.4