From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DC6AC282CA for ; Tue, 12 Feb 2019 13:09:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03F61214DA for ; Tue, 12 Feb 2019 13:09:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729749AbfBLNJa (ORCPT ); Tue, 12 Feb 2019 08:09:30 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36174 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729738AbfBLNJ2 (ORCPT ); Tue, 12 Feb 2019 08:09:28 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 21A29C01DE11; Tue, 12 Feb 2019 13:09:28 +0000 (UTC) Received: from krava (unknown [10.43.17.136]) by smtp.corp.redhat.com (Postfix) with SMTP id 6FC365C26A; Tue, 12 Feb 2019 13:09:26 +0000 (UTC) Date: Tue, 12 Feb 2019 14:09:25 +0100 From: Jiri Olsa To: Alexey Budankov Cc: Arnaldo Carvalho de Melo , Ingo Molnar , Peter Zijlstra , Namhyung Kim , Alexander Shishkin , Andi Kleen , linux-kernel Subject: Re: [PATCH v2 3/4] perf record: enable runtime trace compression Message-ID: <20190212130925.GM775@krava> References: <044ee2be-2e1d-e90f-7317-40083b5e716c@linux.intel.com> <5bc6958d-f4bc-d4ea-e5d0-16c5e7b73911@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5bc6958d-f4bc-d4ea-e5d0-16c5e7b73911@linux.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 12 Feb 2019 13:09:28 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 11, 2019 at 11:23:40PM +0300, Alexey Budankov wrote: SNIP > diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c > index 239e9a13c2b7..980784b77fe2 100644 > --- a/tools/perf/util/mmap.c > +++ b/tools/perf/util/mmap.c > @@ -156,6 +156,86 @@ void __weak auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp __mayb > { > } > > +static ssize_t perf_mmap__capture(struct perf_mmap *md, int idx, > + perf_mmap__compress_fn_t compress, void *where) what's the point of casting perf_session* to void* ? all the way down to the compression, where you cast it back? SNIP > +int perf_session__zstd_fini(struct perf_session *session) > +{ > + if (session->zstd_cstream) { > + ZSTD_freeCStream(session->zstd_cstream); > + session->zstd_cstream = NULL; > + } > + > + return 0; > +} > + > +size_t perf_session__zstd_compress(void *to, void *dst, size_t dst_size, > + void *src, size_t src_size) > +{ > + struct perf_session *session = to; in here... it could be just struct perf_session* no? jirka