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 5FE86A0C41 for ; Thu, 18 Nov 2021 17:26:43 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id DF6FB40687; Thu, 18 Nov 2021 17:26:42 +0100 (CET) Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by mails.dpdk.org (Postfix) with ESMTP id 91BCE40395 for ; Thu, 18 Nov 2021 17:26:41 +0100 (CET) Received: by mail-pj1-f49.google.com with SMTP id x7so5588482pjn.0 for ; Thu, 18 Nov 2021 08:26:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=j7CdFSwBLbky3UT2lnCtakrjdRIp1HU1aduFlzGlcQg=; b=XCWMA0Gh3gMH5+//gOXWzc3BdxKcrtUGPIgODvefgLzcf+iadH88n4PVSNw6zfsbk2 cOyhPW/CmFUfR4U/Lvwagv4DdPNcVi9l4sbuUB3f56OEThrvuiK6RDbyUu/5JPe1BHai VCprQF4NDjJewaob/qPFKuTeeIoykvh7xUKJs8YoKUmQsRWjUQzbiGVWF0Y41XU02Lh1 FXRlSJjMoTOJouPKRgHTPyicFyIbzoNaOKwIYAsz+ZD6mAHy6mMLoPWE5z36UnaLmPoj Lvz+hjIGcupyh4xTnB/PeVieh3kgROYiy5Fh2YgD9xFFbgCTgsXZdJBg1FdBiFwHwWTM WE+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=j7CdFSwBLbky3UT2lnCtakrjdRIp1HU1aduFlzGlcQg=; b=RsFJLqIzoqu9RUFcFDLkpLeBYwW0qd47XFlCSxOwUUf10hRUPU8a0pTwlIv9X43pmq VjZ6/k/DDE54upcoeAmk4jJvSoQsOCM+3RV2mzpNo6KIH0PbyKj5gMcKekBrFe1nKLyS ZO+Yz8db2fsagLB4aV50x0LOmTwUhuA1wt2p+vVHJcq88gebMNhx+49+biul2pGQ4g1P Wep7Wordrhrs4i34+hqaiPu9PgqIZUiI7aw/QCrgtV3pbWFjOFSEpqeaMMXwrJSYcKic 0ldcVhwCxHX9Qon6gP660htaiKUZZHPqudZfigSMMfE0U/bvXDr4/PKkKLptEwq4obvM kU3A== X-Gm-Message-State: AOAM5313lZdnVgTebERBS8fSNDG9CDmIZCWw8YYIx0Wyifywug6Gc6Lt h0K8eZXsq3iUsnReRJSmb4qHxQ== X-Google-Smtp-Source: ABdhPJwpz1yWTSxCmexdD9Tak2OBWUOOjA7za2UvodUT4pHmZqPeeg51DegxxkLD8SiGczBGORrdew== X-Received: by 2002:a17:90b:1b0a:: with SMTP id nu10mr11786886pjb.35.1637252800753; Thu, 18 Nov 2021 08:26:40 -0800 (PST) Received: from hermes.local (204-195-33-123.wavecable.com. [204.195.33.123]) by smtp.gmail.com with ESMTPSA id x17sm97263pfa.209.2021.11.18.08.26.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Nov 2021 08:26:40 -0800 (PST) Date: Thu, 18 Nov 2021 08:26:37 -0800 From: Stephen Hemminger To: Antonio Di Bacco Cc: "users@dpdk.org" Subject: Re: Accessing TLS for EAL threads Message-ID: <20211118082637.24ca9876@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Tue, 16 Nov 2021 17:38:43 +0000 Antonio Di Bacco wrote: > I need to emulate the pthread_setspecific and pthread_getspecific for EAL threads. I don't find any suitable APIs in the DPDK to access the TLS and get and set keys. > > I launched a number of threads using the rte_eal_remote launch but I don't find any API that allows me to access the TLS for those threads. There is not an API for a thread to access another threads local storage directly. The DPDK TLS is wrapper around the glibc (and Windows) implementation of TLS. For particular data structures, you can create a global data structure that is an array of pointers indexed by lcore, and each lcore fills in itself. Or do a more complex API via message passing.