From patchwork Wed Jun 28 12:04:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Wu, Fei" X-Patchwork-Id: 13295655 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 09BE7EB64DA for ; Wed, 28 Jun 2023 12:06:07 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qETsk-0007at-Em; Wed, 28 Jun 2023 08:02:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qETsd-0007UR-7k for qemu-devel@nongnu.org; Wed, 28 Jun 2023 08:02:42 -0400 Received: from mga01.intel.com ([192.55.52.88]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qETsX-0006hC-TT for qemu-devel@nongnu.org; Wed, 28 Jun 2023 08:02:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687953753; x=1719489753; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iXdZiM9wHrHsHxOasbNIOEuEt1z288cTyQQ7G+fWjmI=; b=iTtwfSYGBIhtzag/LhFMXYK0Pbnqi8sRXKh6WL8oJO0Xekap4EsyxGDy lGMivJ9/6Lornf5Oih7GprWONmUFPG3AY6uvPkNfwEzp2tXWeCfBP45XT /Aqh7aLnjDxtTwI4PfIDVw1OyBpUKGzeJZBw0rhTCvjeTwz7oWW0Ne29+ E/yYk7kbXasmof7MebpIZStW9sXt9rtLM+o8Bo7706eaBG+3TD7C24ouc 5p2gH5WFH54BmkHIFmMTQqfdhQ4IVhSYUWEEMD7OW2T4hiQKycgLf9Cig KnsM4D2G8lNegXk696DBbQJyXQAhZB/cB7HZ1hvwiOXjfkMC5q4A6lapd w==; X-IronPort-AV: E=McAfee;i="6600,9927,10754"; a="392547314" X-IronPort-AV: E=Sophos;i="6.01,165,1684825200"; d="scan'208";a="392547314" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jun 2023 05:02:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10754"; a="841047493" X-IronPort-AV: E=Sophos;i="6.01,165,1684825200"; d="scan'208";a="841047493" Received: from wufei-optiplex-7090.sh.intel.com ([10.238.200.247]) by orsmga004.jf.intel.com with ESMTP; 28 Jun 2023 05:02:21 -0700 From: Fei Wu To: richard.henderson@linaro.org, alex.bennee@linaro.org, qemu-devel@nongnu.org Cc: Fei Wu , Paolo Bonzini Subject: [PATCH v16 5/9] tb-stats: reset the tracked TBs on a tb_flush Date: Wed, 28 Jun 2023 20:04:26 +0800 Message-Id: <20230628120430.73777-6-fei2.wu@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230628120430.73777-1-fei2.wu@intel.com> References: <20230628120430.73777-1-fei2.wu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.88; envelope-from=fei2.wu@intel.com; helo=mga01.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alex Bennée We keep track of translations but can only do so up until the translation cache is flushed. At that point we really have no idea if we can re-create a translation because all the active tracking information has been reset. Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson Signed-off-by: Fei Wu --- accel/tcg/tb-maint.c | 1 + accel/tcg/tb-stats.c | 18 ++++++++++++++++++ include/exec/tb-stats.h | 8 ++++++++ 3 files changed, 27 insertions(+) diff --git a/accel/tcg/tb-maint.c b/accel/tcg/tb-maint.c index 264bdd84b3..1ebe6fc60e 100644 --- a/accel/tcg/tb-maint.c +++ b/accel/tcg/tb-maint.c @@ -762,6 +762,7 @@ static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count) qht_reset_size(&tb_ctx.htable, CODE_GEN_HTABLE_SIZE); tb_remove_all(); + tbstats_reset_tbs(); tcg_region_reset_all(); /* XXX: flush processor icache at this point if cache flush is expensive */ qatomic_inc(&tb_ctx.tb_flush_count); diff --git a/accel/tcg/tb-stats.c b/accel/tcg/tb-stats.c index c90dde37d0..7c7f700c89 100644 --- a/accel/tcg/tb-stats.c +++ b/accel/tcg/tb-stats.c @@ -103,6 +103,24 @@ void clean_tbstats(void) qht_destroy(&tb_ctx.tb_stats); } +/* + * We have to reset the tbs array on a tb_flush as those + * TranslationBlocks no longer exist. + */ + +static void reset_tbs_array(void *p, uint32_t hash, void *userp) +{ + TBStatistics *tbs = p; + g_ptr_array_set_size(tbs->tbs, 0); +} + +void tbstats_reset_tbs(void) +{ + if (tb_ctx.tb_stats.map) { + qht_iter(&tb_ctx.tb_stats, reset_tbs_array, NULL); + } +} + void init_tb_stats_htable(void) { if (!tb_ctx.tb_stats.map && tb_stats_collection_enabled()) { diff --git a/include/exec/tb-stats.h b/include/exec/tb-stats.h index ef6e8b6388..cef177bc69 100644 --- a/include/exec/tb-stats.h +++ b/include/exec/tb-stats.h @@ -94,4 +94,12 @@ void dump_jit_profile_info(GString *buf); void clean_tbstats(void); +/** + * tbstats_reset_tbs: reset the linked array of TBs + * + * Reset the list of tbs for a given array. Should be called from + * safe work during tb_flush. + */ +void tbstats_reset_tbs(void); + #endif