From nobody Mon Dec 1 22:02:19 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 9F76628CF6F; Mon, 1 Dec 2025 07:06:02 +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=1764572764; cv=none; b=FHM1RLhW1P24HKYuGcsr+lu0QCSjzmiquBOB4ol/VmWBJ45pY75eaFxvwHYNQd9kSxkXtUk8OjCMjyn6kBg2mSzE9R3kOmv4F9Te9ev2Ft53jqkrzXajmIJ2lfe/noojGcYZCKADY44sNkRxtSzgFEDuKqHoGvdp5mwPRW2kprs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764572764; c=relaxed/simple; bh=sCIUOv3Pc5Bi8qejXKpGiXcetCSWnbvRoMyDZQmLMJY=; h=Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type:Date; b=R49jJ4+rL6c0g/XcjBvqrAxou7h7JJy/9qBvRwRBudVpkBSl4FX4aU2h2EG7j5ZxV/6Vgb31My0EuQ1xnPsmTYE1zVfFOWMHCQzJ/ANRv6oBMqwrwdMwLv9V9GymbJpa/2ixx315fmlPVXzLV2gSEcBlXUz7nqxUrx4JDPENR+Y= 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=nhrDDeu4; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=YMk4aXqb; 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="nhrDDeu4"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="YMk4aXqb" Message-ID: <20251128230240.840699861@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1764572760; 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=kGoBtb87LQvvEeMEt7z1mXVJHPOZKvaBorLUBvllkfA=; b=nhrDDeu4L3bx2uNPZxPSRDA/ezkglufUN1xv3xLB8J2YhPV/uXnnbOqBTCNi4UKQ6kWlNQ R/SxqpZtHeRbbKjgBprfQq9L4ZioKdwqgMCa+VOLcpx4PQloihn5LWlv3TBm9jtzmK4vtm bL8FSwOR+nMO4YC8dVTtwiLalCfq10jnicT7CC3FppFDCre4vEeQQGxbJdgKdXZUbTpMmc rQTppJL/SsIQFeyixa8zoztpceNlBeJ/KVmUecLcn12oqUJfw+LPtpEc+CFRtscO+G9oZ7 vCmYQMMf97XkGHBG2jDfhL2YQZvmi8wzEX6iYZYqPnVEfEam3mvYk/VU8y48rg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1764572760; 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=kGoBtb87LQvvEeMEt7z1mXVJHPOZKvaBorLUBvllkfA=; b=YMk4aXqbI90rVTKr8jTNQC4jHvtB86bQhOrWBUITqSGzsBI2ulirWPf4AAufoa2qznFVEP zcWI2nIgoPx+EIDQ== From: Thomas Gleixner To: LKML Cc: 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, Randy Dunlap , Peter Zijlstra , Ron Geva , Waiman Long Subject: [patch V5 03/11] rseq: Add statistics for time slice extensions References: <20251128225931.959481199@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 1 Dec 2025 08:05:54 +0100 (CET) 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 --- V5: Add s_aborted to account for arbitrary syscalls --- include/linux/rseq_entry.h | 5 +++++ kernel/rseq.c | 14 ++++++++++++++ 2 files changed, 19 insertions(+) --- a/include/linux/rseq_entry.h +++ b/include/linux/rseq_entry.h @@ -15,6 +15,11 @@ 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; + unsigned long s_aborted; }; =20 DECLARE_PER_CPU(struct rseq_stats, rseq_stats); --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -138,6 +138,13 @@ 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)); + stats.s_aborted +=3D data_race(per_cpu(rseq_stats.s_aborted, cpu)); + } } =20 seq_printf(m, "exit: %16lu\n", stats.exit); @@ -148,6 +155,13 @@ 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); + seq_printf(m, "sabort: %16lu\n", stats.s_aborted); + } return 0; }