From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.158 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794315098; b=zIYzF2e0iY/IvEHBi91TSvUQIKLID2fFtiuZVYDMOnDO0CaVlMFsk3d8YIA8xky/YVdk 4sGGpVcoMTreH8ZCtOwYo2SQ8Ag777uEOP0OuWjqlE6GsVsxNrV2jVDigBC+cgXFyjIg/ r7WC2AG1q6Ngth/S1vgDySR23KtEKSKffkfcvOL0Q6ze2wtIAq3LAODKz8eg3ekQapYPM iCnxJPHlW/ZqReJZb0oNPs/PPYw9jUvdYTiZUiEhZ1lAQkjZJlsSimMNFqJs8EJ23OzTi 4abrfeckjj+1A6H6B9mFjQH6Wsh4rWGqNlfaiDVEUlyknH2cNlAaM3lFvTC3jMaRd+g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794315098; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=RFv7UBnzr82TPaBJp6124pYT0jBn52Qd5UGAxk9lS1k=; b=Yn+w7U+ZYzF31qCNntbr4lPGfXvDnUe61vhPw1DvCkkTe3SKhaXlj9B/ZOAwh8KvVI76 fB47GZRa0FOJdqKBImzgITRMws9cGEEj2Ffpk8+1Afk6bhrM2JDCUj7Ma6HJtsUhuCYTP +1Ucle/uBRDYuGkCN1jKYbCxZO5h+ncTvo3h7JEfYZCU1CMPGKG2T6xq2ZZvXKCup90kc l4l5wwKBoxtv1XGnC7yH4ozz37YLuMP7vAIBqbMa6/IZtJrgMgyiPjqUabwCCpGiH6gq2 9lW5WXpsPVvyInBcOK4KOUK+iewfJWmu3bIYPMZVB1nIgv/Ct7CzNQbcbbDOlPuRbyA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=eI0hhfBk; arc=none smtp.remote-ip=95.215.58.158 Received: from mta1.migadu.com (out-158.mta1.migadu.com [95.215.58.158]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 113E860A380F for ; Tue, 10 Nov 2026 12:51:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 113E860A380F Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=eI0hhfBk X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=yfFCdwk/e0ynSBLLJzEBbB0h06SCnoIpbB2KBYA+o3A=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794315095; v=1; x=1794919895; b=eI0hhfBko2JouH7RYZ9tlExYSJ9hzzgSX0XH+CTssWTj785ADQV5O/OHndy1yC/5nsNXNkPL dsVOHs8oR50SURwnkNmQRrXY9KV3eD8vgb7FtUlZ4j97voYIOXeI7eivz1B17jXTvRU8Cd016qS CNTcfsiCeGRt1Iqyg9E7H5qw= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id de0f297dc80b2cf4; Tue, 10 Nov 2026 12:51:34 +0000 X-Mizu-Trace-ID: de0f297dc80b2cf4 X-Migadu-Flow: FLOW_OUT From: Tao Cui To: tj@kernel.org Cc: void@manifault.com, arighi@nvidia.com, changwoo@igalia.com, liwanwu@kylinos.cn, devnexen@gmail.com, zhaomengmeng@kylinos.cn, emil@etsalapatis.com, yphbchou0911@gmail.com, mingo@redhat.com, sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, cui.tao@linux.dev, Tao Cui Subject: [PATCH 7/9] tools/sched_ext: scx_qmap: Reset the hier stats baseline on restart Date: Tue, 10 Nov 2026 20:49:59 +0800 Message-ID: <20261110125001.4167503-8-cui.tao@linux.dev> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261110125001.4167503-1-cui.tao@linux.dev> References: <20261110125001.4167503-1-cui.tao@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tao Cui hprev holds the previous per-participant counter snapshots for the hier stats deltas and is initialized before the restart: label, so a hotplug-triggered fail-safe reload leaves it holding snapshots from the previous generation while the scheduler's own counters start from zero; the first stats interval prints u64-underflow garbage. Reset it together with optind on reload. Fixes: e9151ed5c944 ("tools/sched_ext: scx_qmap - Expand hierarchical sub-scheduling") Signed-off-by: Tao Cui --- tools/sched_ext/scx_qmap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/sched_ext/scx_qmap.c b/tools/sched_ext/scx_qmap.c index f44802247069..414afb817e0a 100644 --- a/tools/sched_ext/scx_qmap.c +++ b/tools/sched_ext/scx_qmap.c @@ -292,6 +292,7 @@ int main(int argc, char **argv) } restart: optind = 1; + memset(&hprev, 0, sizeof(hprev)); skel = SCX_OPS_CID_OPEN(qmap_ops, scx_qmap); skel->rodata->slice_ns = skel->rodata->__SCX_SLICE_DFL; -- 2.53.0 base-commit: 5b740a72b55c4267ba4d8010f17dde26b26f52d3