From nobody Tue Feb 10 05:46:56 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1564590432; cv=none; d=zoho.com; s=zohoarc; b=GfR0RR9qTsZYq+LMOlP5Z7umIXCIAb17coLHg0Q085jZG/YGp+A33pwjbJ88k7ry0ziKgpZPBQqAOuX8H8gJQNEc9XPBjsGMBQCXKa0/f+9QJhg2+q9W1HOyFVVz1uzzCbYMvJoXj3Atb7zrDMCoFqKznpSp9zUYbj4JM9dLRGM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1564590432; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=JAsL9lKxpSV7gJFxFeCPfJnq/9l3IF3WkKcMWFNHkFQ=; b=GCe1RNeeDKmqaw9/GjH2VyFDjwRY4jTaroX98neMy4qkCRYOBqSs2a4lAZkgD+zEx9bjP7F8CL0rlNZFHS7jFWvSQPeg9g5w43iA2Ce1BARZBn4MhUbCRB48ZWth2dk3++uaeknCW/IkADqlkgScUzDrn/k4t/8NVEyIzLMwK1U= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1564590432271361.6728890366652; Wed, 31 Jul 2019 09:27:12 -0700 (PDT) Received: from localhost ([::1]:42722 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsrRX-0000dT-8L for importer@patchew.org; Wed, 31 Jul 2019 12:27:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42439) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsrG8-0005zJ-G9 for qemu-devel@nongnu.org; Wed, 31 Jul 2019 12:15:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hsrG6-0004AB-4I for qemu-devel@nongnu.org; Wed, 31 Jul 2019 12:15:24 -0400 Received: from mail-wm1-x344.google.com ([2a00:1450:4864:20::344]:33461) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hsrG5-00048p-Rq for qemu-devel@nongnu.org; Wed, 31 Jul 2019 12:15:22 -0400 Received: by mail-wm1-x344.google.com with SMTP id h19so1641598wme.0 for ; Wed, 31 Jul 2019 09:15:21 -0700 (PDT) Received: from zen.linaroharston ([81.128.185.34]) by smtp.gmail.com with ESMTPSA id p18sm68312914wrm.16.2019.07.31.09.15.14 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Wed, 31 Jul 2019 09:15:17 -0700 (PDT) Received: from zen.linaroharston. (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 338C11FFC9; Wed, 31 Jul 2019 17:07:24 +0100 (BST) 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=JAsL9lKxpSV7gJFxFeCPfJnq/9l3IF3WkKcMWFNHkFQ=; b=Gofb3qoizzTEFOrIm6gY/3mjfRv4Me7XXMW1YJZSHIoq1utaJv189tPrtL+XPVsmTR XLEiDlX9ibfSFJE+ujZ0Ch3FDJqLg+2CcL714dkzfrHcBv9SiwWkb9kBvD9tNc2lT12p Vdf9eklBWH7NMxoYY4EqbxzwoRRmntM4X5pJE+Vye8PTzPduhdNaPgyNwuJFMhy/kR2w i6fa+VwJnzioj6YzGhfZ1xpEpcgwxWO6ws1Q6FbgqAhftu5DXfMJ+P8bR2K3ozDEJvD3 3M/JcqbeHm7NYiDZw/466sh9fZT/aIKSmPgAo+IawBPynCH4iHXT5979K8bXB0XgZ1oO 2Bkg== 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=JAsL9lKxpSV7gJFxFeCPfJnq/9l3IF3WkKcMWFNHkFQ=; b=YWiQNGugSU2KNJapd1T3GZ48jqCYUoroUpc7j/nD//Ila+Kpa95XwR8+LZcg+jl+w1 605+EJ1D1MQHcd2+g9kuRvEZ6HN8BNbm6n33kPIIMYfJ+7Fmk+lcPmuY48uOZ3bQBvbc l3kA4XtbFcqTGj1ow2aQpgXvze/0PLt1v3fWXf0CeWXxABRB+fzE2IDMgiiB3nyhxfAV yeW1NVFjjIaxihEnzs3Ra2lPiNuxOrklF51L/98l4u3t9mhIyogno1JYntwBR018OaKd 2SwbMYeXJWiMBftxFrG54TCtqGCyTqrKZxfk5RRnsTH8cLWIIpihirmOA20C+10LYier TRdA== X-Gm-Message-State: APjAAAWpouphnFzV3i0/tZGW4RymCPGGmQtGSdR+fR0ZPGlUXyT1BueL lOtKW9LcURcRYki3jP95fFoGPQ== X-Google-Smtp-Source: APXvYqweIncqGHtkBm9WAAowNUtnX7rzJ9XJod8v0iIgCDeMguinb185qEsp46reHChWw6zAMdg8YQ== X-Received: by 2002:a1c:a686:: with SMTP id p128mr50348737wme.130.1564589720435; Wed, 31 Jul 2019 09:15:20 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Wed, 31 Jul 2019 17:07:16 +0100 Message-Id: <20190731160719.11396-52-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190731160719.11396-1-alex.bennee@linaro.org> References: <20190731160719.11396-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::344 Subject: [Qemu-devel] [PATCH v4 51/54] tests/plugin: add hotpages plugin to breakdown memory access patterns 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: bobby.prani@gmail.com, cota@braap.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , aaron@os.amperecomputing.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) This plugin gives a break down of access patterns grouped into pages. Signed-off-by: Alex Benn=C3=A9e --- v4 - tweaks for new hwaddr api - add sorting and pagesize selection args --- tests/plugin/Makefile | 1 + tests/plugin/hotpages.c | 179 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 180 insertions(+) create mode 100644 tests/plugin/hotpages.c diff --git a/tests/plugin/Makefile b/tests/plugin/Makefile index 3656429d46b..75467b6db85 100644 --- a/tests/plugin/Makefile +++ b/tests/plugin/Makefile @@ -12,6 +12,7 @@ NAMES +=3D insn NAMES +=3D mem NAMES +=3D hotblocks NAMES +=3D howvec +NAMES +=3D hotpages =20 SONAMES :=3D $(addsuffix .so,$(addprefix lib,$(NAMES))) =20 diff --git a/tests/plugin/hotpages.c b/tests/plugin/hotpages.c new file mode 100644 index 00000000000..13ce8ffeb8b --- /dev/null +++ b/tests/plugin/hotpages.c @@ -0,0 +1,179 @@ +/* + * Copyright (C) 2019, Alex Benn=C3=A9e + * + * Hot Pages - show which pages saw the most memory accesses. + * + * License: GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +static uint64_t page_size =3D 4096; +static uint64_t page_mask; +static int stdout_fd; +static int limit =3D 50; +static enum qemu_plugin_mem_rw rw =3D QEMU_PLUGIN_MEM_RW; + +enum sort_type { + SORT_RW =3D 0, + SORT_R, + SORT_W +}; + +static int sort_by =3D SORT_RW; + +typedef struct { + uint64_t page_address; + int cpu_read; + int cpu_write; + uint64_t reads; + uint64_t writes; +} PageCounters; + +static GMutex lock; +static GHashTable *pages; + +static gint cmp_access_count(gconstpointer a, gconstpointer b) +{ + PageCounters *ea =3D (PageCounters *) a; + PageCounters *eb =3D (PageCounters *) b; + int r; + switch (sort_by) { + case SORT_RW: + r =3D (ea->reads + ea->writes) > (eb->reads + eb->writes) ? -1 : 1; + break; + case SORT_R: + r =3D ea->reads > eb->reads ? -1 : 1; + break; + case SORT_W: + r =3D ea->writes > eb->writes ? -1 : 1; + break; + default: + g_assert_not_reached(); + } + return r; +} + + +static void plugin_exit(qemu_plugin_id_t id, void *p) +{ + GString *report =3D g_string_new("Addr, RCPUs, Reads, WCPUs, Writes\n"= ); + int i; + GList *counts; + + counts =3D g_hash_table_get_values(pages); + if (counts && g_list_next(counts)) { + GList *it; + + it =3D g_list_sort(counts, cmp_access_count); + + for (i =3D 0; i < limit && it->next; i++, it =3D it->next) { + PageCounters *rec =3D (PageCounters *) it->data; + g_string_append_printf(report, + "%#016"PRIx64", 0x%04x, %"PRId64 + ", 0x%04x, %"PRId64"\n", + rec->page_address, + rec->cpu_read, rec->reads, + rec->cpu_write, rec->writes); + } + g_list_free(it); + } + + dprintf(stdout_fd, "%s", report->str); + g_string_free(report, true); +} + +static void plugin_init(void) +{ + page_mask =3D (page_size - 1); + pages =3D g_hash_table_new(NULL, g_direct_equal); +} + +static void vcpu_haddr(unsigned int cpu_index, qemu_plugin_meminfo_t memin= fo, + uint64_t vaddr, void *udata) +{ + struct qemu_plugin_hwaddr *hwaddr =3D qemu_plugin_get_hwaddr(meminfo, = vaddr); + uint64_t page; + PageCounters *count; + + /* We only get a hwaddr for system emulation */ + if (hwaddr) { + page =3D (uint64_t) qemu_plugin_hwaddr_to_raddr(hwaddr); + } else { + page =3D vaddr; + } + page &=3D ~page_mask; + + g_mutex_lock(&lock); + count =3D (PageCounters *) g_hash_table_lookup(pages, GUINT_TO_POINTER= (page)); + + if (!count) { + count =3D g_new0(PageCounters, 1); + count->page_address =3D page; + g_hash_table_insert(pages, GUINT_TO_POINTER(page), (gpointer) coun= t); + } + if (qemu_plugin_mem_is_store(meminfo)) { + count->writes++; + count->cpu_write |=3D (1 << cpu_index); + } else { + count->reads++; + count->cpu_read |=3D (1 << cpu_index); + } + + g_mutex_unlock(&lock); +} + +static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) +{ + size_t n =3D qemu_plugin_tb_n_insns(tb); + size_t i; + + for (i =3D 0; i < n; i++) { + struct qemu_plugin_insn *insn =3D qemu_plugin_tb_get_insn(tb, i); + qemu_plugin_register_vcpu_mem_cb(insn, vcpu_haddr, + QEMU_PLUGIN_CB_NO_REGS, + rw, NULL); + } +} + +QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, int argc, + char **argv) +{ + int i; + + /* to be used when in the exit hook */ + stdout_fd =3D dup(STDOUT_FILENO); + assert(stdout_fd); + + for (i =3D 0; i < argc; i++) { + char *opt =3D argv[i]; + if (g_strcmp0(opt, "reads") =3D=3D 0) { + sort_by =3D SORT_R; + } else if (g_strcmp0(opt, "writes") =3D=3D 0) { + sort_by =3D SORT_W; + } else if (g_str_has_prefix(opt, "pagesize=3D")) { + page_size =3D g_ascii_strtoull(opt + 9, NULL, 10); + } else { + dprintf(stdout_fd, "option parsing failed: %s\n", opt); + return -1; + } + } + + plugin_init(); + + qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans); + qemu_plugin_register_atexit_cb(id, plugin_exit, NULL); + return 0; +} --=20 2.20.1