From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 F1D69103A9AD for ; Wed, 25 Mar 2026 11:43:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A215F10E89A; Wed, 25 Mar 2026 11:43:59 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="aeBmX2xs"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 18F9410E89A for ; Wed, 25 Mar 2026 11:43:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774439033; x=1805975033; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=OpLqqW8QlkYz6+e+lzjAkFvaBrm8Ki0r/ODwRz4If1c=; b=aeBmX2xs0W6hDQtcu1jyp8KRnIZBAQIDoQXgiJnsGa5H9jBY/r7Y+t7m EChElyo/35NaAbnsl4uV4sHWY9HHxYszaigpfIScUL0Xx0Y1ch2zvp0EY +NsHyMJ3nLOfBGzg7QdWqMX5eCmGTpMyeNEDdFIyhLalechVurNfd6lTe dFdFfIK8b4wuJfESR9bw5ZZvTYEsR8KtcepBcjPCwTwrlcqaP4Fs78qRJ 9R9+xoDo2r2xOcTgHf0gGqbFxYC/xszgaIbIvF/L5/2RA7hq64E/2+1eA B/kiWlWoSRS/kBa1XWWlMa6wqNuFY77TLDbVKYARjfYEbHgfn+PwojW6o Q==; X-CSE-ConnectionGUID: 9Idn2PgBQF2+Obvwrx6bpQ== X-CSE-MsgGUID: +5t+eDuqQwKjeLcWnI8GkA== X-IronPort-AV: E=McAfee;i="6800,10657,11739"; a="79379734" X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="79379734" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 04:43:53 -0700 X-CSE-ConnectionGUID: bMaB+Rg4Tg+2okHAHiTuDA== X-CSE-MsgGUID: sipEvuI9QuenG7ZYAvtdXg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="255156093" Received: from jsokolow-alderlakeclientplatform.igk.intel.com ([172.28.176.71]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 04:43:51 -0700 From: Jan Sokolowski To: igt-dev@lists.freedesktop.org Cc: zbigniew.kempczynski@intel.com, peter.senna@linux.intel.com, piotr.rudnicki@intel.com, Jan Sokolowski Subject: [PATCH i-g-t v1 1/1] lib/igt_core: flush output on each line Date: Wed, 25 Mar 2026 12:49:01 +0100 Message-ID: <20260325114901.256229-1-jan.sokolowski@intel.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" It was found while running tests that if a test launches threads with even more subthreads, some igt_debug calls might not print their lines. Fflush after each line to make sure we see everything we want to see. Signed-off-by: Jan Sokolowski --- lib/igt_core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/lib/igt_core.c b/lib/igt_core.c index 65325f08d..ed4f48d86 100644 --- a/lib/igt_core.c +++ b/lib/igt_core.c @@ -3294,10 +3294,8 @@ void igt_vlog(const char *domain, enum igt_log_level level, const char *format, pthread_mutex_lock(&print_mutex); /* use stderr for warning messages and above */ - if (level >= IGT_LOG_WARN) { + if (level >= IGT_LOG_WARN) file = stderr; - fflush(stdout); - } else file = stdout; @@ -3309,6 +3307,11 @@ void igt_vlog(const char *domain, enum igt_log_level level, const char *format, _log_line_fprintf(file, "%s%s", thread_id, line); } + /* Ensure output is flushed explicitly, as concurrent test threads + * may otherwise cause messages to be dropped or reordered. + */ + fflush(file); + pthread_mutex_unlock(&print_mutex); out: -- 2.43.0