From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 4C1915A99 for ; Thu, 22 Jan 2015 09:17:44 +0100 (CET) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 22 Jan 2015 00:17:43 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,447,1418112000"; d="scan'208";a="654715062" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by fmsmga001.fm.intel.com with ESMTP; 22 Jan 2015 00:17:41 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t0M8HdIq006064; Thu, 22 Jan 2015 16:17:39 +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 t0M8HbT7002908; Thu, 22 Jan 2015 16:17:39 +0800 Received: (from cliang18@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t0M8Hb0h002904; Thu, 22 Jan 2015 16:17:37 +0800 From: Cunming Liang To: dev@dpdk.org Date: Thu, 22 Jan 2015 16:16:38 +0800 Message-Id: <1421914598-2747-16-git-send-email-cunming.liang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1421914598-2747-1-git-send-email-cunming.liang@intel.com> References: <1417589628-43666-1-git-send-email-cunming.liang@intel.com> <1421914598-2747-1-git-send-email-cunming.liang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v1 15/15] timer: add support to non-EAL thread 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: Thu, 22 Jan 2015 08:17:45 -0000 Allow to setup timers only for EAL (lcore) threads (__lcore_id < MAX_LCORE_ID). E.g. – dynamically created thread will be able to reset/stop timer for lcore thread, but it will be not allowed to setup timer for itself or another non-lcore thread. rte_timer_manage() for non-lcore thread would simply do nothing and return straightway. Signed-off-by: Cunming Liang --- lib/librte_timer/rte_timer.c | 40 +++++++++++++++++++++++++++++++--------- lib/librte_timer/rte_timer.h | 2 +- 2 files changed, 32 insertions(+), 10 deletions(-) diff --git a/lib/librte_timer/rte_timer.c b/lib/librte_timer/rte_timer.c index 269a992..601c159 100644 --- a/lib/librte_timer/rte_timer.c +++ b/lib/librte_timer/rte_timer.c @@ -79,9 +79,10 @@ static struct priv_timer priv_timer[RTE_MAX_LCORE]; /* when debug is enabled, store some statistics */ #ifdef RTE_LIBRTE_TIMER_DEBUG -#define __TIMER_STAT_ADD(name, n) do { \ - unsigned __lcore_id = rte_lcore_id(); \ - priv_timer[__lcore_id].stats.name += (n); \ +#define __TIMER_STAT_ADD(name, n) do { \ + unsigned __lcore_id = rte_lcore_id(); \ + if (__lcore_id < RTE_MAX_LCORE) \ + priv_timer[__lcore_id].stats.name += (n); \ } while(0) #else #define __TIMER_STAT_ADD(name, n) do {} while(0) @@ -127,15 +128,26 @@ timer_set_config_state(struct rte_timer *tim, unsigned lcore_id; lcore_id = rte_lcore_id(); + if (lcore_id >= RTE_MAX_LCORE) + lcore_id = LCORE_ID_ANY; /* wait that the timer is in correct status before update, * and mark it as being configured */ while (success == 0) { prev_status.u32 = tim->status.u32; + /* + * prevent race condition of non-EAL threads + * to update the timer. When 'owner == LCORE_ID_ANY', + * it means updated by a non-EAL thread. + */ + if (lcore_id == (unsigned)LCORE_ID_ANY && + (uint16_t)lcore_id == prev_status.owner) + return -1; + /* timer is running on another core, exit */ if (prev_status.state == RTE_TIMER_RUNNING && - (unsigned)prev_status.owner != lcore_id) + prev_status.owner != (uint16_t)lcore_id) return -1; /* timer is being configured on another core */ @@ -366,9 +378,13 @@ __rte_timer_reset(struct rte_timer *tim, uint64_t expire, /* round robin for tim_lcore */ if (tim_lcore == (unsigned)LCORE_ID_ANY) { - tim_lcore = rte_get_next_lcore(priv_timer[lcore_id].prev_lcore, - 0, 1); - priv_timer[lcore_id].prev_lcore = tim_lcore; + if (lcore_id < RTE_MAX_LCORE) { + tim_lcore = rte_get_next_lcore( + priv_timer[lcore_id].prev_lcore, + 0, 1); + priv_timer[lcore_id].prev_lcore = tim_lcore; + } else + tim_lcore = rte_get_next_lcore(LCORE_ID_ANY, 0, 1); } /* wait that the timer is in correct status before update, @@ -378,7 +394,8 @@ __rte_timer_reset(struct rte_timer *tim, uint64_t expire, return -1; __TIMER_STAT_ADD(reset, 1); - if (prev_status.state == RTE_TIMER_RUNNING) { + if (prev_status.state == RTE_TIMER_RUNNING && + lcore_id < RTE_MAX_LCORE) { priv_timer[lcore_id].updated = 1; } @@ -455,7 +472,8 @@ rte_timer_stop(struct rte_timer *tim) return -1; __TIMER_STAT_ADD(stop, 1); - if (prev_status.state == RTE_TIMER_RUNNING) { + if (prev_status.state == RTE_TIMER_RUNNING && + lcore_id < RTE_MAX_LCORE) { priv_timer[lcore_id].updated = 1; } @@ -499,6 +517,10 @@ void rte_timer_manage(void) uint64_t cur_time; int i, ret; + /* timer manager only runs on EAL thread */ + if (lcore_id >= RTE_MAX_LCORE) + return; + __TIMER_STAT_ADD(manage, 1); /* optimize for the case where per-cpu list is empty */ if (priv_timer[lcore_id].pending_head.sl_next[0] == NULL) diff --git a/lib/librte_timer/rte_timer.h b/lib/librte_timer/rte_timer.h index 4907cf5..5c5df91 100644 --- a/lib/librte_timer/rte_timer.h +++ b/lib/librte_timer/rte_timer.h @@ -76,7 +76,7 @@ extern "C" { #define RTE_TIMER_RUNNING 2 /**< State: timer function is running. */ #define RTE_TIMER_CONFIG 3 /**< State: timer is being configured. */ -#define RTE_TIMER_NO_OWNER -1 /**< Timer has no owner. */ +#define RTE_TIMER_NO_OWNER -2 /**< Timer has no owner. */ /** * Timer type: Periodic or single (one-shot). -- 1.8.1.4