From patchwork Mon Oct 7 19:16:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 13825207 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 6B0D9CFB455 for ; Mon, 7 Oct 2024 19:21:36 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sxtEh-00052j-CY; Mon, 07 Oct 2024 15:17:39 -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 1sxtEf-0004zD-LQ; Mon, 07 Oct 2024 15:17:37 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sxtEd-00046W-Tr; Mon, 07 Oct 2024 15:17:37 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id B79A596247; Mon, 7 Oct 2024 22:16:48 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 90A1014F728; Mon, 7 Oct 2024 22:16:55 +0300 (MSK) Received: (nullmailer pid 2592734 invoked by uid 1000); Mon, 07 Oct 2024 19:16:54 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Gert Wollny , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Michael Tokarev Subject: [Stable-9.1.1 11/32] ui/sdl2: set swap interval explicitly when OpenGL is enabled Date: Mon, 7 Oct 2024 22:16:28 +0300 Message-Id: <20241007191654.2592616-11-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.5 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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: 2.1.29 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: Gert Wollny Before 176e3783f2ab (ui/sdl2: OpenGL window context) SDL_CreateRenderer was called unconditionally setting the swap interval to 0. Since SDL_CreateRenderer is now no longer called when OpenGL is enabled, the swap interval is no longer set explicitly and vsync handling depends on the environment settings which may lead to a performance regression with virgl as reported in https://gitlab.com/qemu-project/qemu/-/issues/2565 Restore the old vsync handling by explicitly calling SDL_GL_SetSwapInterval if OpenGL is enabled. Fixes: 176e3783f2ab (ui/sdl2: OpenGL window context) Closes: https://gitlab.com/qemu-project/qemu/-/issues/2565 Signed-off-by: Gert Wollny Acked-by: Marc-André Lureau Message-ID: <01020191e05ce6df-84da6386-62c2-4ce8-840e-ad216ac253dd-000000@eu-west-1.amazonses.com> Signed-off-by: Philippe Mathieu-Daudé (cherry picked from commit ae23cd00170baaa2777eb1ee87b70f472dbb3c44) Signed-off-by: Michael Tokarev diff --git a/ui/sdl2.c b/ui/sdl2.c index 98ed974371..51299f3645 100644 --- a/ui/sdl2.c +++ b/ui/sdl2.c @@ -115,6 +115,7 @@ void sdl2_window_create(struct sdl2_console *scon) SDL_SetHint(SDL_HINT_RENDER_BATCHING, "1"); scon->winctx = SDL_GL_CreateContext(scon->real_window); + SDL_GL_SetSwapInterval(0); } else { /* The SDL renderer is only used by sdl2-2D, when OpenGL is disabled */ scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);