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[209.51.188.17]) by mx.google.com with ESMTPS id i1si14860975yba.461.2020.07.13.13.09.18 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 13 Jul 2020 13:09:18 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@linaro.org header.s=google header.b=zOKKinMl; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1]:58690 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jv4lJ-00089p-SD for patch@linaro.org; Mon, 13 Jul 2020 16:09:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59570) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jv4gj-0008Gz-De for qemu-devel@nongnu.org; Mon, 13 Jul 2020 16:04:33 -0400 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]:44885) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jv4gh-0006JN-GR for qemu-devel@nongnu.org; Mon, 13 Jul 2020 16:04:33 -0400 Received: by mail-wr1-x442.google.com with SMTP id b6so18142756wrs.11 for ; Mon, 13 Jul 2020 13:04:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=RFloOI9RdqsuY1jzWY/LdnGW0qTS1vaDIDIUNvMdMkw=; b=zOKKinMl8Lc4tl+khcrq25otS5ClYMFza+X8Eb8n8PJ7hQDMp7qLKWT7XBzuLwUnTi VjmNAJQVQ8lV8KViFJt6Ozwz01fq/4O5j/ugnJOlgWRuWS2rLAvFgb/A1HQBF55RbRcZ GQvBF03MeCYdYuHLlSkW1GWLRGzaW/2xHlEzOxRnbI10ygzyNKxJW+TeXWZ60yztPJnx PwSYc/3A956kxyXldFVqJWJqmrfib28ef2fVWm+uiDaIOkbqTL/AdGRXizdlqrJpddv4 8IBew9zVF+kF5eibGXk6wzK6t67zqOdaQAphN8pyy3GT1vKQ8SeZRAq3HKPkeAvi7x7Q 3fsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=RFloOI9RdqsuY1jzWY/LdnGW0qTS1vaDIDIUNvMdMkw=; b=HG6Ikq8ZHO+Vs/UYJ+j5HrrgIrKtr5bcVaHYHL5opYNB0HC+Vl3/y687JOH4QL8qlJ aV8kCd713EdH8aey2O1ugM5ZUZcBXiGkTwdZEP+tL6fcpT5+ZRg1FBkmbrujJ0p9Gv2c ay/dgyfdFldNDke89p23gXvB5Q+bbOGPSRqHy8ChzMiUuEg3y2LGSpTNYyxAd61ilBL9 ji/X7rTz4W2m8QeviiRJDr7zx5czlIS4tPnmrH1FWgRLSaZduxcx0i5IvVIE0qbsXLyn S4IICrwi/W/uPCDnFYr2lvEbkLOIMIKUtznB1LRrCh9kHpnQc/7xLOCCLBSDElPFNsdx e0pg== X-Gm-Message-State: AOAM530B8xazTi8iIvKMPlNruyh3RmR5jbCY1gx3KpP794VWJj5b3gOc SR4wTHNED6L0wMV77Rkm+CAuwg== X-Received: by 2002:a5d:6107:: with SMTP id v7mr1188315wrt.174.1594670670106; Mon, 13 Jul 2020 13:04:30 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id 190sm939618wmb.15.2020.07.13.13.04.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2020 13:04:23 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 43CCF1FF93; Mon, 13 Jul 2020 21:04:16 +0100 (BST) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Subject: [PATCH v2 07/11] plugins: expand the bb plugin to be thread safe and track per-cpu Date: Mon, 13 Jul 2020 21:04:11 +0100 Message-Id: <20200713200415.26214-8-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200713200415.26214-1-alex.bennee@linaro.org> References: <20200713200415.26214-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::442; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x442.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, berrange@redhat.com, robert.foley@linaro.org, =?utf-8?q?Alex_Benn=C3=A9e?= , richard.henderson@linaro.org, f4bug@amsat.org, robhenry@microsoft.com, aaron@os.amperecomputing.com, cota@braap.org, Dave Bort , kuhn.chenqun@huawei.com, peter.puhov@linaro.org, aurelien@aurel32.net Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" While there isn't any easy way to make the inline counts thread safe we can ensure the callback based ones are. While we are at it we can reduce introduce a new option ("idle") to dump a report of the current bb and insn count each time a vCPU enters the idle state. Signed-off-by: Alex Bennée Reviewed-by: Robert Foley Cc: Dave Bort --- v2 - fixup for non-inline linux-user case - minor cleanup and re-factor v3 - checkpatch --- tests/plugin/bb.c | 97 ++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 84 insertions(+), 13 deletions(-) -- 2.20.1 diff --git a/tests/plugin/bb.c b/tests/plugin/bb.c index df19fd359d..e4cc7fdd6e 100644 --- a/tests/plugin/bb.c +++ b/tests/plugin/bb.c @@ -16,24 +16,67 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION; -static uint64_t bb_count; -static uint64_t insn_count; +typedef struct { + GMutex lock; + int index; + uint64_t bb_count; + uint64_t insn_count; +} CPUCount; + +/* Used by the inline & linux-user counts */ static bool do_inline; +static CPUCount inline_count; + +/* Dump running CPU total on idle? */ +static bool idle_report; +static GPtrArray *counts; +static int max_cpus; + +static void gen_one_cpu_report(CPUCount *count, GString *report) +{ + if (count->bb_count) { + g_string_append_printf(report, "CPU%d: " + "bb's: %" PRIu64", insns: %" PRIu64 "\n", + count->index, + count->bb_count, count->insn_count); + } +} static void plugin_exit(qemu_plugin_id_t id, void *p) { - g_autofree gchar *out = g_strdup_printf( - "bb's: %" PRIu64", insns: %" PRIu64 "\n", - bb_count, insn_count); - qemu_plugin_outs(out); + g_autoptr(GString) report = g_string_new(""); + + if (do_inline || !max_cpus) { + g_string_printf(report, "bb's: %" PRIu64", insns: %" PRIu64 "\n", + inline_count.bb_count, inline_count.insn_count); + } else { + g_ptr_array_foreach(counts, (GFunc) gen_one_cpu_report, report); + } + qemu_plugin_outs(report->str); +} + +static void vcpu_idle(qemu_plugin_id_t id, unsigned int cpu_index) +{ + CPUCount *count = g_ptr_array_index(counts, cpu_index); + g_autoptr(GString) report = g_string_new(""); + gen_one_cpu_report(count, report); + + if (report->len > 0) { + g_string_prepend(report, "Idling "); + qemu_plugin_outs(report->str); + } } static void vcpu_tb_exec(unsigned int cpu_index, void *udata) { - unsigned long n_insns = (unsigned long)udata; + CPUCount *count = max_cpus ? + g_ptr_array_index(counts, cpu_index) : &inline_count; - insn_count += n_insns; - bb_count++; + unsigned long n_insns = (unsigned long)udata; + g_mutex_lock(&count->lock); + count->insn_count += n_insns; + count->bb_count++; + g_mutex_unlock(&count->lock); } static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) @@ -42,9 +85,10 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) if (do_inline) { qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64, - &bb_count, 1); + &inline_count.bb_count, 1); qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64, - &insn_count, n_insns); + &inline_count.insn_count, + n_insns); } else { qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec, QEMU_PLUGIN_CB_NO_REGS, @@ -56,8 +100,35 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info, int argc, char **argv) { - if (argc && strcmp(argv[0], "inline") == 0) { - do_inline = true; + int i; + + for (i = 0; i < argc; i++) { + char *opt = argv[i]; + if (g_strcmp0(opt, "inline") == 0) { + do_inline = true; + } else if (g_strcmp0(opt, "idle") == 0) { + idle_report = true; + } else { + fprintf(stderr, "option parsing failed: %s\n", opt); + return -1; + } + } + + if (info->system_emulation && !do_inline) { + max_cpus = info->system.max_vcpus; + counts = g_ptr_array_new(); + for (i = 0; i < max_cpus; i++) { + CPUCount *count = g_new0(CPUCount, 1); + g_mutex_init(&count->lock); + count->index = i; + g_ptr_array_add(counts, count); + } + } else if (!do_inline) { + g_mutex_init(&inline_count.lock); + } + + if (idle_report) { + qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle); } qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);