From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 280BD43B6A; Mon, 4 Mar 2024 18:57:05 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 53C4D42EB7; Mon, 4 Mar 2024 18:53:34 +0100 (CET) Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mails.dpdk.org (Postfix) with ESMTP id 84D114027D for ; Mon, 4 Mar 2024 18:52:53 +0100 (CET) Received: by linux.microsoft.com (Postfix, from userid 1086) id 5604220B56A6; Mon, 4 Mar 2024 09:52:51 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 5604220B56A6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1709574772; bh=zhm4LPLrFB36IcCMrGaOkTXLOx2sRulDCPbXWwL7ijM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k/agJjqhURYOhv6+nz5HNmsdPXmXj2YEEToF9iZdMzvl2O0617JLGJPIhgL4jSfQs y+Yc/sM+4e430LdQqkNFDdtYUz9iN10QZcsjd/ycFzZtATnScGLz41MlrTaFi1e30d ImqUIE+74bL0v8nk1dCtcXprTIIzTBArLrqfF+lw= From: Tyler Retzlaff To: dev@dpdk.org Cc: Andrew Rybchenko , Bruce Richardson , Chengwen Feng , Cristian Dumitrescu , David Christensen , David Hunt , Ferruh Yigit , Honnappa Nagarahalli , Jasvinder Singh , Jerin Jacob , Kevin Laatz , Konstantin Ananyev , Min Zhou , Ruifeng Wang , Sameh Gobriel , Stanislaw Kardach , Thomas Monjalon , Vladimir Medvedkin , Yipeng Wang , Tyler Retzlaff Subject: [PATCH v7 39/39] ip_frag: use C11 alignas Date: Mon, 4 Mar 2024 09:52:44 -0800 Message-Id: <1709574764-9041-40-git-send-email-roretzla@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1709574764-9041-1-git-send-email-roretzla@linux.microsoft.com> References: <1707873986-29352-1-git-send-email-roretzla@linux.microsoft.com> <1709574764-9041-1-git-send-email-roretzla@linux.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The current location used for __rte_aligned(a) for alignment of types and variables is not compatible with MSVC. There is only a single location accepted by both toolchains. For variables standard C11 offers alignas(a) supported by conformant compilers i.e. both MSVC and GCC. For types the standard offers no alignment facility that compatibly interoperates with C and C++ but may be achieved by relocating the placement of __rte_aligned(a) to the aforementioned location accepted by all currently supported toolchains. To allow alignment for both compilers do the following: * Move __rte_aligned from the end of {struct,union} definitions to be between {struct,union} and tag. The placement between {struct,union} and the tag allows the desired alignment to be imparted on the type regardless of the toolchain being used for all of GCC, LLVM, MSVC compilers building both C and C++. * Replace use of __rte_aligned(a) on variables/fields with alignas(a). Signed-off-by: Tyler Retzlaff Acked-by: Morten Brørup Acked-by: Konstantin Ananyev --- lib/ip_frag/ip_reassembly.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/ip_frag/ip_reassembly.h b/lib/ip_frag/ip_reassembly.h index a9f97ae..5443c73 100644 --- a/lib/ip_frag/ip_reassembly.h +++ b/lib/ip_frag/ip_reassembly.h @@ -47,7 +47,7 @@ struct ip_frag_key { * Fragmented packet to reassemble. * First two entries in the frags[] array are for the last and first fragments. */ -struct ip_frag_pkt { +struct __rte_cache_aligned ip_frag_pkt { RTE_TAILQ_ENTRY(ip_frag_pkt) lru; /* LRU list */ struct ip_frag_key key; /* fragmentation key */ uint64_t start; /* creation timestamp */ @@ -55,20 +55,20 @@ struct ip_frag_pkt { uint32_t frag_size; /* size of fragments received */ uint32_t last_idx; /* index of next entry to fill */ struct ip_frag frags[IP_MAX_FRAG_NUM]; /* fragments */ -} __rte_cache_aligned; +}; /* fragments tailq */ RTE_TAILQ_HEAD(ip_pkt_list, ip_frag_pkt); /* fragmentation table statistics */ -struct ip_frag_tbl_stat { +struct __rte_cache_aligned ip_frag_tbl_stat { uint64_t find_num; /* total # of find/insert attempts. */ uint64_t add_num; /* # of add ops. */ uint64_t del_num; /* # of del ops. */ uint64_t reuse_num; /* # of reuse (del/add) ops. */ uint64_t fail_total; /* total # of add failures. */ uint64_t fail_nospace; /* # of 'no space' add failures. */ -} __rte_cache_aligned; +}; /* fragmentation table */ struct rte_ip_frag_tbl { -- 1.8.3.1