From nobody Tue Oct 7 13:25:42 2025 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) (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 04D102BF015; Wed, 9 Jul 2025 10:47:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=79.96.170.134 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752058042; cv=none; b=s2cOoz2rg+nrcdJu3myZu1SXFa1aMehOFDsPqsMSbQgz3LDSCBVo+SCd1CPwSTdbewXngPqcJbkX0ji5RMatAtfWwD3P6wkIABjwp+iz2qEmCEEmu+ysZ2pyWgKwyoCOSR6nJ/Avfq5vJibILuomkaN2iHava9ug0QfgytXcDtY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752058042; c=relaxed/simple; bh=Ez9u/s0cezxWdP+Fs1SIRb2V30U1MtIUEgSd9tnSAzo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=MazFFczQ8m2L8q5SiVfMNmTuYOPJnx1ymecH3GHCt3eRmFWL5SXGSnwI00U/slwbnutEWy6Z2/Q7OPKbvoFDr7GMYUmS3jGQ5NPuC1/Qlo8vZnZHVyjnlHM9RlBAYTp+Y3cXxb4lPT/PL6+XFNXVt7r576GpVVOsIV8CNVtRdnE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net; spf=pass smtp.mailfrom=rjwysocki.net; dkim=pass (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b=azOueTrm; arc=none smtp.client-ip=79.96.170.134 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b="azOueTrm" Received: from kreacher.localnet (unknown [5.63.189.50]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by cloudserver094114.home.pl (Postfix) with ESMTPSA id 82B4466F553; Wed, 9 Jul 2025 12:47:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rjwysocki.net; s=dkim; t=1752058038; bh=Ez9u/s0cezxWdP+Fs1SIRb2V30U1MtIUEgSd9tnSAzo=; h=From:Subject:Date; b=azOueTrmAe0k+OTjHkWA+W8hM77oGIzcsGtIk4i1A3iXfbzvECoaYCXICu6xIlNTD jIO9JUzt/5cn2grv2aZtEyyPDh0E2kEGHUMpLQzG8Us7YKhKcVgiqD1XOvEN3GcUkW MlGEWY8yRAbgmb1yKaYy7UGitDvUGZFyz/ptwm2/TpiUOBu/D/AlYX3huWnHEZNqqX T9mGxX+bDl2k5iy0k3MzcAnuu+b+ocv6/vRs040U8zUqIRUJju62J26CLCCzeoYM3f lDSdrDZ+MiJxHShAbA/DKaFGettaegbStIdwCMbbddCNc3L+LxDHz4NInR3YvDkpHr afSxBNalQYNfA== From: "Rafael J. Wysocki" To: x86 Maintainers Cc: LKML , Linux PM , Ricardo Neri , Peter Zijlstra Subject: [PATCH v1] x86/sched: Print debug messages on hybrid asym capacity changes Date: Wed, 09 Jul 2025 12:47:17 +0200 Message-ID: <4664631.LvFx2qVVIh@rjwysocki.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CLIENT-IP: 5.63.189.50 X-CLIENT-HOSTNAME: 5.63.189.50 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: 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 X-DCC--Metrics: v370.home.net.pl 1024; Body=5 Fuz1=5 Fuz2=5 Content-Type: text/plain; charset="utf-8" From: Rafael J. Wysocki Subject: [PATCH v1] x86/sched: Print debug messages on hybrid asym capacity= changes Make arch_set_cpu_capacity() print a debug message including the capacity and maximum frequency ratio used in scale-invariant utilization computations for a given CPU and in capacity-aware scheduling (CAS) or energy-aware scheduling (EAS). Signed-off-by: Rafael J. Wysocki --- arch/x86/kernel/cpu/aperfmperf.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/x86/kernel/cpu/aperfmperf.c +++ b/arch/x86/kernel/cpu/aperfmperf.c @@ -416,6 +416,10 @@ div_u64(cap << SCHED_CAPACITY_SHIFT, max_cap)); WRITE_ONCE(per_cpu_ptr(arch_cpu_scale, cpu)->freq_ratio, div_u64(cap_freq << SCHED_CAPACITY_SHIFT, base_freq)); + + pr_debug("CPU%d: capacity =3D %lu, freq_ratio =3D %lu\n", cpu, + per_cpu_ptr(arch_cpu_scale, cpu)->capacity, + per_cpu_ptr(arch_cpu_scale, cpu)->freq_ratio); } else { WARN_ONCE(1, "Hybrid CPU capacity scaling not enabled"); }