From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id DD61CA059F; Fri, 10 Apr 2020 14:46:33 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 8CC891D556; Fri, 10 Apr 2020 14:46:33 +0200 (CEST) Received: from git-send-mailer.rdmz.labs.mlnx (unknown [37.142.13.130]) by dpdk.org (Postfix) with ESMTP id 7C4881D53F for ; Fri, 10 Apr 2020 14:46:32 +0200 (CEST) From: Suanming Mou To: cristian.dumitrescu@intel.com, dev@dpdk.org Cc: amo@semihalf.com Date: Fri, 10 Apr 2020 20:46:25 +0800 Message-Id: <1586522787-403236-1-git-send-email-suanmingm@mellanox.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1583828479-204084-1-git-send-email-suanmingm@mellanox.com> References: <1583828479-204084-1-git-send-email-suanmingm@mellanox.com> Subject: [dpdk-dev] [PATCH v3 0/2] bitmap: add create bitmap with all bits set X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Currently, in the case to use bitmap as resource allocator, after bitmap creation, all the bitmap bits should be set to indicate the bit available. Every time when allocate one bit, search for the set bits and clear it to make it in use. Add a new rte_bitmap_init_with_all_set() function to have a quick fill up the bitmap bits. Comparing with the case create the bitmap as empty and set the bitmap one by one, the new function costs less cycles. For bitmap with 1000 bits, create the bitmap with all bits set costs 754 cycles, while set one by one costs 14194. CPU info as below: Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz v3 updates: 1. Implement individual rte_bitmap_init_with_all_set() function. 2. Add new function to clear the overhead bits. v2 updates: 1. Split the common part to __rte_bitmap_init(). 2. Set the slab bits more customized. Suanming Mou (2): bitmap: add create bitmap with all bits set test/bitmap: add bitmap create with all bits set case app/test/test_bitmap.c | 57 ++++++++++++++++++++++++++- lib/librte_eal/include/rte_bitmap.h | 78 +++++++++++++++++++++++++++++++++++++ 2 files changed, 134 insertions(+), 1 deletion(-) -- 1.8.3.1