From patchwork Mon Mar 28 23:26:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 12794320 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5EC01C433EF for ; Mon, 28 Mar 2022 23:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230433AbiC1X2w (ORCPT ); Mon, 28 Mar 2022 19:28:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230408AbiC1X2r (ORCPT ); Mon, 28 Mar 2022 19:28:47 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B90A3AA42 for ; Mon, 28 Mar 2022 16:27:00 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id y10-20020a5b0d0a000000b00633b9765410so11999387ybp.18 for ; Mon, 28 Mar 2022 16:27:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=fd8zO3I7cR3jn/Jx1EW0YLNB0c8F/thF/fGaitvvb58=; b=jhWfrBgC3Vidx16ZXPyaLDraZh3tQuBYXM724VRgco4ncvfxUi7yyZL7BAMENECuRr c8ZOwIgO5+uZy4p89VQXhbbCrSL8Cd0fRgY7Qgttlf7fm0fUgJe7cfxJoGx0+cGnFh7N KEB+IRtL1LlXsuam7rw7lu71qt2dGcSOIUCAjAPnee7ZkCJxJfye0EhEXY60jtniThLR W/hBrZyqmOKkZUOvGE6itlT47MOqBU1C+DuAI8pS9d/x1QpFDWyaip6AFrUXzzx+rM4Q qHMX7xcid4VCbEkpxBxj7NPPx8jYtHKTG09Hyjy3FN0YubprJa9gxwYNJH5xntFBiNm3 06uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=fd8zO3I7cR3jn/Jx1EW0YLNB0c8F/thF/fGaitvvb58=; b=mVB2rDhl0p55WAxwD7mDf3pu6ieJVSEGAp/JChuz/Fafodcama+ruDj4mk3YyUEnKw IxRXTnaJbNQMWdORcMxAEy5wDRYnGg6ca8KqYD0uP45BAYdTmL6cSu2wZKchf3rKnkXN AacvYtPYYog5cCJfwtctsXV4coNhp7SokRE1sAy3F2FWwOqXacMfcJg6veASEqtfN2GP QzuYtdEs6/fyR9VD1EY6LCUU1BX2Q4c0wYtiBPbEC8TWBjiZinDVROrMYl4QsS00rgyz SJG0fX1MTVCIA/4a5vp2y3AaUcJeZR4O2JE8HXQ3EoZ70cOZ0zKsOM4mvO+xrfRKiF0Z 7RJA== X-Gm-Message-State: AOAM533A5E6nWWN0FyEU5s4Dlxgv+SjQslpqlDK1UnkRXgQx5YF08RYy r4Wuk2e50N/7CSpKB4p9NGOaFMhSOD8h X-Google-Smtp-Source: ABdhPJx9mX24vBUXKujfAxpZd4EOEF4CDe3zBNIYlkFzjKX9KG29aQUbCRbBy+3NfgADLi4J9ufU7jNV4G8B X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:9d6a:527d:cf46:71e2]) (user=irogers job=sendgmr) by 2002:a0d:eb4c:0:b0:2e5:bd5c:12cf with SMTP id u73-20020a0deb4c000000b002e5bd5c12cfmr28160203ywe.116.1648510019835; Mon, 28 Mar 2022 16:26:59 -0700 (PDT) Date: Mon, 28 Mar 2022 16:26:45 -0700 In-Reply-To: <20220328232648.2127340-1-irogers@google.com> Message-Id: <20220328232648.2127340-4-irogers@google.com> Mime-Version: 1.0 References: <20220328232648.2127340-1-irogers@google.com> X-Mailer: git-send-email 2.35.1.1021.g381101b075-goog Subject: [PATCH v2 3/6] perf cpumap: Add is_subset function From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Mathieu Poirier , Suzuki K Poulose , Mike Leach , Leo Yan , John Garry , Will Deacon , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Kajol Jain , James Clark , German Gomez , Adrian Hunter , Riccardo Mancini , Andi Kleen , Alexey Bayduraev , Alexander Antonov , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, bpf@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Returns true if the second argument is a subset of the first. Signed-off-by: Ian Rogers --- tools/lib/perf/cpumap.c | 20 ++++++++++++++++++++ tools/lib/perf/include/internal/cpumap.h | 1 + 2 files changed, 21 insertions(+) diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c index ee66760f1e63..23701024e0c0 100644 --- a/tools/lib/perf/cpumap.c +++ b/tools/lib/perf/cpumap.c @@ -319,6 +319,26 @@ struct perf_cpu perf_cpu_map__max(struct perf_cpu_map *map) return map->nr > 0 ? map->map[map->nr - 1] : result; } +/** Is 'b' a subset of 'a'. */ +bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b) +{ + if (a == b || !b) + return true; + if (!a || b->nr > a->nr) + return false; + + for (int i = 0, j = 0; i < a->nr; i++) { + if (a->map[i].cpu > b->map[j].cpu) + return false; + if (a->map[i].cpu == b->map[j].cpu) { + j++; + if (j == b->nr) + return true; + } + } + return false; +} + /* * Merge two cpumaps * diff --git a/tools/lib/perf/include/internal/cpumap.h b/tools/lib/perf/include/internal/cpumap.h index 1973a18c096b..35dd29642296 100644 --- a/tools/lib/perf/include/internal/cpumap.h +++ b/tools/lib/perf/include/internal/cpumap.h @@ -25,5 +25,6 @@ struct perf_cpu_map { #endif int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu); +bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b); #endif /* __LIBPERF_INTERNAL_CPUMAP_H */