From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <cliang18@shecgisg004.sh.intel.com>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
by dpdk.org (Postfix) with ESMTP id B63F5B681
for <dev@dpdk.org>; Tue, 17 Feb 2015 03:08:58 +0100 (CET)
Received: from orsmga001.jf.intel.com ([10.7.209.18])
by orsmga103.jf.intel.com with ESMTP; 16 Feb 2015 18:03:39 -0800
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.09,591,1418112000"; d="scan'208";a="653028817"
Received: from shvmail01.sh.intel.com ([10.239.29.42])
by orsmga001.jf.intel.com with ESMTP; 16 Feb 2015 18:08:56 -0800
Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com
[10.239.29.89])
by shvmail01.sh.intel.com with ESMTP id t1H28rpm019611;
Tue, 17 Feb 2015 10:08:53 +0800
Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1])
by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id
t1H28ofX028740; Tue, 17 Feb 2015 10:08:52 +0800
Received: (from cliang18@localhost)
by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t1H28nh8028736;
Tue, 17 Feb 2015 10:08:49 +0800
From: Cunming Liang <cunming.liang@intel.com>
To: dev@dpdk.org
Date: Tue, 17 Feb 2015 10:08:06 +0800
Message-Id: <1424138896-28618-10-git-send-email-cunming.liang@intel.com>
X-Mailer: git-send-email 1.7.4.1
In-Reply-To: <1424138896-28618-1-git-send-email-cunming.liang@intel.com>
References: <1423970145-31985-1-git-send-email-cunming.liang@intel.com>
<1424138896-28618-1-git-send-email-cunming.liang@intel.com>
Subject: [dpdk-dev] [PATCH v8 09/19] eal: add rte_gettid() to acquire unique
system tid
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
<mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
<mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Tue, 17 Feb 2015 02:08:59 -0000
The rte_gettid() wraps the linux and freebsd syscall gettid().
It provides a persistent unique thread id for the calling thread.
It will save the unique id in TLS on the first time.
Signed-off-by: Cunming Liang <cunming.liang@intel.com>
---
lib/librte_eal/bsdapp/eal/eal_thread.c | 9 +++++++++
lib/librte_eal/common/include/rte_eal.h | 27 +++++++++++++++++++++++++++
lib/librte_eal/linuxapp/eal/eal_thread.c | 7 +++++++
3 files changed, 43 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/eal_thread.c b/lib/librte_eal/bsdapp/eal/eal_thread.c
index 10220c7..d0c077b 100644
--- a/lib/librte_eal/bsdapp/eal/eal_thread.c
+++ b/lib/librte_eal/bsdapp/eal/eal_thread.c
@@ -39,6 +39,7 @@
#include <sched.h>
#include <pthread_np.h>
#include <sys/queue.h>
+#include <sys/thr.h>
#include <rte_debug.h>
#include <rte_atomic.h>
@@ -233,3 +234,11 @@ eal_thread_loop(__attribute__((unused)) void *arg)
/* pthread_exit(NULL); */
/* return NULL; */
}
+
+/* require calling thread tid by gettid() */
+int rte_sys_gettid(void)
+{
+ long lwpid;
+ thr_self(&lwpid);
+ return (int)lwpid;
+}
diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h
index f4ecd2e..8ccdd65 100644
--- a/lib/librte_eal/common/include/rte_eal.h
+++ b/lib/librte_eal/common/include/rte_eal.h
@@ -41,6 +41,9 @@
*/
#include <stdint.h>
+#include <sched.h>
+
+#include <rte_per_lcore.h>
#ifdef __cplusplus
extern "C" {
@@ -262,6 +265,30 @@ rte_set_application_usage_hook( rte_usage_hook_t usage_func );
*/
int rte_eal_has_hugepages(void);
+/**
+ * A wrap API for syscall gettid.
+ *
+ * @return
+ * On success, returns the thread ID of calling process.
+ * It always successful.
+ */
+int rte_sys_gettid(void);
+
+/**
+ * Get system unique thread id.
+ *
+ * @return
+ * On success, returns the thread ID of calling process.
+ * It always successful.
+ */
+static inline int rte_gettid(void)
+{
+ static RTE_DEFINE_PER_LCORE(int, _thread_id) = -1;
+ if (RTE_PER_LCORE(_thread_id) == -1)
+ RTE_PER_LCORE(_thread_id) = rte_sys_gettid();
+ return RTE_PER_LCORE(_thread_id);
+}
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_eal/linuxapp/eal/eal_thread.c b/lib/librte_eal/linuxapp/eal/eal_thread.c
index 748a83a..ed20c93 100644
--- a/lib/librte_eal/linuxapp/eal/eal_thread.c
+++ b/lib/librte_eal/linuxapp/eal/eal_thread.c
@@ -39,6 +39,7 @@
#include <pthread.h>
#include <sched.h>
#include <sys/queue.h>
+#include <sys/syscall.h>
#include <rte_debug.h>
#include <rte_atomic.h>
@@ -233,3 +234,9 @@ eal_thread_loop(__attribute__((unused)) void *arg)
/* pthread_exit(NULL); */
/* return NULL; */
}
+
+/* require calling thread tid by gettid() */
+int rte_sys_gettid(void)
+{
+ return (int)syscall(SYS_gettid);
+}
--
1.8.1.4