From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from proxy.6wind.com (host.76.145.23.62.rev.coltfrance.com [62.23.145.76]) by dpdk.org (Postfix) with ESMTP id D1EA891B8 for ; Wed, 18 May 2016 13:05:15 +0200 (CEST) Received: from glumotte.dev.6wind.com (unknown [10.16.0.195]) by proxy.6wind.com (Postfix) with ESMTP id 8D13A29BAF; Wed, 18 May 2016 13:03:38 +0200 (CEST) From: Olivier Matz To: dev@dpdk.org Cc: bruce.richardson@intel.com, stephen@networkplumber.org, keith.wiles@intel.com Date: Wed, 18 May 2016 13:04:40 +0200 Message-Id: <1463569496-31086-20-git-send-email-olivier.matz@6wind.com> X-Mailer: git-send-email 2.8.0.rc3 In-Reply-To: <1463569496-31086-1-git-send-email-olivier.matz@6wind.com> References: <1460629199-32489-1-git-send-email-olivier.matz@6wind.com> <1463569496-31086-1-git-send-email-olivier.matz@6wind.com> Subject: [dpdk-dev] [PATCH v3 19/35] mempool: get memory size with unspecified page size 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: Wed, 18 May 2016 11:05:16 -0000 Update rte_mempool_xmem_size() so that when the page_shift argument is set to 0, assume that memory is physically contiguous, allowing to ignore page boundaries. This will be used in the next commits. By the way, rename the variable 'n' as 'obj_per_page' and avoid the affectation inside the if(). Signed-off-by: Olivier Matz --- lib/librte_mempool/rte_mempool.c | 18 +++++++++--------- lib/librte_mempool/rte_mempool.h | 2 +- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c index 0d18511..d5278b4 100644 --- a/lib/librte_mempool/rte_mempool.c +++ b/lib/librte_mempool/rte_mempool.c @@ -253,18 +253,18 @@ rte_mempool_calc_obj_size(uint32_t elt_size, uint32_t flags, size_t rte_mempool_xmem_size(uint32_t elt_num, size_t total_elt_sz, uint32_t pg_shift) { - size_t n, pg_num, pg_sz, sz; + size_t obj_per_page, pg_num, pg_sz; - pg_sz = (size_t)1 << pg_shift; + if (pg_shift == 0) + return total_elt_sz * elt_num; - if ((n = pg_sz / total_elt_sz) > 0) { - pg_num = (elt_num + n - 1) / n; - sz = pg_num << pg_shift; - } else { - sz = RTE_ALIGN_CEIL(total_elt_sz, pg_sz) * elt_num; - } + pg_sz = (size_t)1 << pg_shift; + obj_per_page = pg_sz / total_elt_sz; + if (obj_per_page == 0) + return RTE_ALIGN_CEIL(total_elt_sz, pg_sz) * elt_num; - return sz; + pg_num = (elt_num + obj_per_page - 1) / obj_per_page; + return pg_num << pg_shift; } /* diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h index 0f900a1..53275e4 100644 --- a/lib/librte_mempool/rte_mempool.h +++ b/lib/librte_mempool/rte_mempool.h @@ -1261,7 +1261,7 @@ uint32_t rte_mempool_calc_obj_size(uint32_t elt_size, uint32_t flags, * The size of each element, including header and trailer, as returned * by rte_mempool_calc_obj_size(). * @param pg_shift - * LOG2 of the physical pages size. + * LOG2 of the physical pages size. If set to 0, ignore page boundaries. * @return * Required memory size aligned at page boundary. */ -- 2.8.0.rc3