From patchwork Wed Jan 28 06:59:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cunming Liang X-Patchwork-Id: 2616 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id ADEF25AC3; Wed, 28 Jan 2015 08:00:28 +0100 (CET) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 59DCA5A77 for ; Wed, 28 Jan 2015 08:00:23 +0100 (CET) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP; 27 Jan 2015 23:00:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="446231364" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by FMSMGA003.fm.intel.com with ESMTP; 27 Jan 2015 22:46:18 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t0S7005E023731; Wed, 28 Jan 2015 15:00:00 +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 t0S6xvpg005972; Wed, 28 Jan 2015 14:59:59 +0800 Received: (from cliang18@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t0S6xvrP005968; Wed, 28 Jan 2015 14:59:57 +0800 From: Cunming Liang To: dev@dpdk.org Date: Wed, 28 Jan 2015 14:59:16 +0800 Message-Id: <1422428365-5875-7-git-send-email-cunming.liang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1422428365-5875-1-git-send-email-cunming.liang@intel.com> References: <1421914598-2747-1-git-send-email-cunming.liang@intel.com> <1422428365-5875-1-git-send-email-cunming.liang@intel.com> Subject: [dpdk-dev] [PATCH v2 06/15] 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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); +}