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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS 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 2D63BC43381 for ; Wed, 20 Feb 2019 15:03:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F1EB521902 for ; Wed, 20 Feb 2019 15:03:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726711AbfBTPDt (ORCPT ); Wed, 20 Feb 2019 10:03:49 -0500 Received: from mga04.intel.com ([192.55.52.120]:13740 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725890AbfBTPDs (ORCPT ); Wed, 20 Feb 2019 10:03:48 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Feb 2019 07:03:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,391,1544515200"; d="scan'208";a="145824190" Received: from linux.intel.com ([10.54.29.200]) by fmsmga004.fm.intel.com with ESMTP; 20 Feb 2019 07:03:48 -0800 Received: from [10.125.252.177] (abudanko-mobl.ccr.corp.intel.com [10.125.252.177]) by linux.intel.com (Postfix) with ESMTP id 87C5258028E; Wed, 20 Feb 2019 07:03:45 -0800 (PST) Subject: Re: [PATCH v2 3/4] perf record: enable runtime trace compression To: Jiri Olsa Cc: Arnaldo Carvalho de Melo , Ingo Molnar , Peter Zijlstra , Namhyung Kim , Alexander Shishkin , Andi Kleen , linux-kernel References: <044ee2be-2e1d-e90f-7317-40083b5e716c@linux.intel.com> <5bc6958d-f4bc-d4ea-e5d0-16c5e7b73911@linux.intel.com> <20190212130925.GM775@krava> From: Alexey Budankov Organization: Intel Corp. Message-ID: Date: Wed, 20 Feb 2019 18:03:44 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <20190212130925.GM775@krava> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12.02.2019 16:09, Jiri Olsa wrote: > 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? As far as it is a pointer. Casting a pointer to void* and back is harmless. Well, let's clean that up. Thanks, Alexey > > jirka >