From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CFCD729D264; Thu, 4 Jun 2026 19:08:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780600094; cv=none; b=ubijygApDfqrs3FwUnop9niVDM5KwWmVqlalDztsgei08Q+vA3FKeyy0PKe9H7uV/+5WaOLvkmXmSB0WMRailuAJlg+IKh6KWrZhzZjkXoEL4aWpVP4FgFGVp4+oJkv6mGwrXQ9w0LQ55+pt4Z8Qt7g+GNuT7yvx5vcd8d6B5AU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780600094; c=relaxed/simple; bh=N0G3F/oZEusxr26Gjt74aYeawMsLE951PANBGPirn6c=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=PkuJg1b67pSTY8QxTXZEKG5q7vf607hg+neroSXIi3MlQheoGEPwyvjTg80iy45MXUXOzwh/Em1ArN6o44k4JvQkw14b0sBGAnRdicq2Uki/FBW4bsEEqzjZr9+UA+pQ/KNib9E1rLCEWGYrUo8IPCQ5NpuFOy1jq0kltEGyJHI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NnnbvduY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NnnbvduY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 292BC1F00893; Thu, 4 Jun 2026 19:08:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780600093; bh=91OnvSCHqySElLUpJ2Invj2Wgtm4Hj7+RrbdiGjtIwc=; h=From:To:Cc:Subject:Date; b=NnnbvduYGzzH2nHg91uvn961IqKJwEN7gHT5ZrpnNs7vHCL28gECz1wBctctnEjRR i9rebWX5DxXrON7ST+7uvay0JbGoxYiv8iJB6E+NfKJaejBW/AB6ZkoM5UlxsirvdZ YNYbhbvSzE9JEkrIXpqBEV2WR3e0+ZBXc08Xjul/Bz51rikmCKuMRjlDDEjZjW67PG 4C2MedcZUaG1TsukK98zm71PE3lqWoNbKd80G4+Cd90FSRgtrg2ZmJOUHY2IaOYbMO oaxJtCM37umgm0XDwIvueaIY0dLI41cniazgUC0MocRPLZjvyRoBIPiAWah0DQIZc7 zMWBc2+WTgmag== From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ian Rogers , Jiri Olsa , Adrian Hunter , James Clark , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org Subject: [PATCH 0/4] perf timechart: Small optimization for backtrace Date: Thu, 4 Jun 2026 12:08:06 -0700 Message-ID: <20260604190812.2168118-1-namhyung@kernel.org> X-Mailer: git-send-email 2.54.0.1032.g2f8565e1d1-goog Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hello, I found an issue int timechart backtrace handling during the last review. The goal is to reduce unnecessary work in generating backtrace string. Thanks, Namhyung Namhyung Kim (4): perf timechart: Don't pass @event to cat_backtrace() perf timechart: Generate backtrace only if needed perf timechart: Remove unused backtrace in trace_handler perf timechart: Remove unnecessary copy of backtrace tools/perf/builtin-timechart.c | 88 ++++++++++++++-------------------- 1 file changed, 36 insertions(+), 52 deletions(-) -- 2.54.0.1032.g2f8565e1d1-goog