From nobody Wed Sep 10 05:14:47 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 E887B3112A0; Mon, 8 Sep 2025 23:00:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757372403; cv=none; b=Y3riYJBWmY+CtwMFjhblfurEbwK9KvFEzICCwEPKTlNu1vuNttcxsJK6BkaA4l5Qi8zO6GE+BJMS5SYXtWzVN2TGIMQB5d3jQOGtRFi+uHZnTDOr7BFLVCkPrDyCxEef43+nvABrRsUVYtBHAVhv3ejJOHhB5jryisBRrGQsQ4w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757372403; c=relaxed/simple; bh=NqQjpQ6wmtHhaimTEy5dZdITuRSnH9EVOsOJjL3t7HI=; h=Message-ID:From:To:Subject:References:MIME-Version:Content-Type: cc:Date; b=mEbf+5Q0uLIxMpsn+1y5EcBFwtSd/rUHn6Q+UbxKHafcrhsnJKBBk/OdrElscpA53wkaQNxmVmQ6nIAO/eakGkr4IfPu1XOAmVT58Q4TU1Cx+y7OWQcEeOE1whqjcCLKpO9jr97FFyeWJJSyWv/MBwl8sSNzIPzG9tFiqCJfK6k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=nwFj8V9x; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=VBKj4myO; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="nwFj8V9x"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="VBKj4myO" Message-ID: <20250908225752.808973324@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1757372398; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=puOLVz/xusJgMHcGpgny0+0j3GVseKRPTpDHpqHQHdc=; b=nwFj8V9xpjJS2xjnYghzTPAyD6gCEZrg2AxvRsBLeDoR2nk/L3vYXTUbc3X+5RthrkvsSm /wAZpJ2nKKTcnTlv9jL3JKKReXvmtzXvNcDOA0OWcm/SxD5JsZi+07Jzt2UoSTIji/380D cjQU6oEn6G9vF/ry0V6bnw4lDL8vHmKKqesivT0DBaaOQLt8R/w7CIm73g0BBg9PdGAkSi m0ZuthDRAX6m1UExAzW3tNLb3nAjkCHwOxzw5YquANpyJwG5JAj2dXsmLnpSaag37i389u xkLz8s4uP9YfNV5dXf4xahqSVFBdqUS+3PTEwIWBALk5krUGQ32KyG2xwxEOGw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1757372398; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=puOLVz/xusJgMHcGpgny0+0j3GVseKRPTpDHpqHQHdc=; b=VBKj4myOJex1TJY340JUP5vfkx/G0eGJvpaP0Z9+PakZRIpGqhqepbTMZTrS9OSLcnudrw CHmJqgfaz6ZnKdCw== From: Thomas Gleixner To: LKML Subject: [patch 04/12] rseq: Add statistics for time slice extensions References: <20250908225709.144709889@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 cc: Peter Zilstra , Peter Zijlstra , Mathieu Desnoyers , "Paul E. McKenney" , Boqun Feng , Jonathan Corbet , Prakash Sangappa , Madadi Vineeth Reddy , K Prateek Nayak , Steven Rostedt , Sebastian Andrzej Siewior , Arnd Bergmann , linux-arch@vger.kernel.org Date: Tue, 9 Sep 2025 00:59:56 +0200 (CEST) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend the quick statistics with time slice specific fields. Signed-off-by: Thomas Gleixner --- include/linux/rseq_entry.h | 4 ++++ kernel/rseq.c | 12 ++++++++++++ 2 files changed, 16 insertions(+) --- a/include/linux/rseq_entry.h +++ b/include/linux/rseq_entry.h @@ -15,6 +15,10 @@ struct rseq_stats { unsigned long cs; unsigned long clear; unsigned long fixup; + unsigned long s_granted; + unsigned long s_expired; + unsigned long s_revoked; + unsigned long s_yielded; }; =20 DECLARE_PER_CPU(struct rseq_stats, rseq_stats); --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -138,6 +138,12 @@ static int rseq_stats_show(struct seq_fi stats.cs +=3D data_race(per_cpu(rseq_stats.cs, cpu)); stats.clear +=3D data_race(per_cpu(rseq_stats.clear, cpu)); stats.fixup +=3D data_race(per_cpu(rseq_stats.fixup, cpu)); + if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) { + stats.s_granted +=3D data_race(per_cpu(rseq_stats.s_granted, cpu)); + stats.s_expired +=3D data_race(per_cpu(rseq_stats.s_expired, cpu)); + stats.s_revoked +=3D data_race(per_cpu(rseq_stats.s_revoked, cpu)); + stats.s_yielded +=3D data_race(per_cpu(rseq_stats.s_yielded, cpu)); + } } =20 seq_printf(m, "exit: %16lu\n", stats.exit); @@ -148,6 +154,12 @@ static int rseq_stats_show(struct seq_fi seq_printf(m, "cs: %16lu\n", stats.cs); seq_printf(m, "clear: %16lu\n", stats.clear); seq_printf(m, "fixup: %16lu\n", stats.fixup); + if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) { + seq_printf(m, "sgrant: %16lu\n", stats.s_granted); + seq_printf(m, "sexpir: %16lu\n", stats.s_expired); + seq_printf(m, "srevok: %16lu\n", stats.s_revoked); + seq_printf(m, "syield: %16lu\n", stats.s_yielded); + } return 0; }