From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id B63F5B681 for ; 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 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-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 --- 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 #include #include +#include #include #include @@ -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 +#include + +#include #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 #include #include +#include #include #include @@ -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