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From: Len Brown <lenb@kernel.org>
To: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Len Brown <len.brown@intel.com>
Subject: [PATCH 04/44] tools/power turbostat: decode Baytrail CC6 and MC6 demotion configuration
Date: Wed,  1 Mar 2017 00:27:08 -0500	[thread overview]
Message-ID: <71616c8e936a6dd541f0627d7bf4ff09971d8ccb.1488345270.git.len.brown@intel.com> (raw)
In-Reply-To: <20170301052748.27810-1-lenb@kernel.org>
In-Reply-To: <678a3bd1b3de6d2ebf604e7d708bc8150bb667e9.1488345270.git.len.brown@intel.com>

From: Len Brown <len.brown@intel.com>

with --debug, see:

cpu0: MSR_CC6_DEMOTION_POLICY_CONFIG: 0x00000000 (DISable-CC6-Demotion)
cpu0: MSR_MC6_DEMOTION_POLICY_CONFIG: 0x00000000 (DISable-MC6-Demotion)

Note that the hardware default is to enable demotion,
and Linux started clearing these registers in 3.17.

Signed-off-by: Len Brown <len.brown@intel.com>
---
 tools/power/x86/turbostat/turbostat.c | 42 +++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index fdf0273465fa..1b762f67e3e2 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -3263,6 +3263,27 @@ int has_snb_msrs(unsigned int family, unsigned int model)
 }
 
 /*
+ * SLV client has supporet for unique MSRs:
+ *
+ * MSR_CC6_DEMOTION_POLICY_CONFIG
+ * MSR_MC6_DEMOTION_POLICY_CONFIG
+ */
+
+int has_slv_msrs(unsigned int family, unsigned int model)
+{
+	if (!genuine_intel)
+		return 0;
+
+	switch (model) {
+	case INTEL_FAM6_ATOM_SILVERMONT1:
+	case INTEL_FAM6_ATOM_MERRIFIELD:
+	case INTEL_FAM6_ATOM_MOOREFIELD:
+		return 1;
+	}
+	return 0;
+}
+
+/*
  * HSW adds support for additional MSRs:
  *
  * MSR_PKG_C8_RESIDENCY		0x00000630
@@ -3496,6 +3517,24 @@ void decode_misc_pwr_mgmt_msr(void)
 			msr & (1 << 1) ? "EN" : "DIS",
 			msr & (1 << 8) ? "EN" : "DIS");
 }
+/*
+ * Decode MSR_CC6_DEMOTION_POLICY_CONFIG, MSR_MC6_DEMOTION_POLICY_CONFIG
+ *
+ * This MSRs are present on Silvermont processors,
+ * Intel Atom processor E3000 series (Baytrail), and friends.
+ */
+void decode_c6_demotion_policy_msr(void)
+{
+	unsigned long long msr;
+
+	if (!get_msr(base_cpu, MSR_CC6_DEMOTION_POLICY_CONFIG, &msr))
+		fprintf(outf, "cpu%d: MSR_CC6_DEMOTION_POLICY_CONFIG: 0x%08llx (%sable-CC6-Demotion)\n",
+			base_cpu, msr, msr & (1 << 0) ? "EN" : "DIS");
+
+	if (!get_msr(base_cpu, MSR_MC6_DEMOTION_POLICY_CONFIG, &msr))
+		fprintf(outf, "cpu%d: MSR_MC6_DEMOTION_POLICY_CONFIG: 0x%08llx (%sable-MC6-Demotion)\n",
+			base_cpu, msr, msr & (1 << 0) ? "EN" : "DIS");
+}
 
 void process_cpuid()
 {
@@ -3700,6 +3739,9 @@ void process_cpuid()
 	if (debug)
 		decode_misc_pwr_mgmt_msr();
 
+	if (debug && has_slv_msrs(family, model))
+		decode_c6_demotion_policy_msr();
+
 	rapl_probe(family, model);
 	perf_limit_reasons_probe(family, model);
 
-- 
2.11.0.161.g6610af872

  parent reply	other threads:[~2017-03-01  7:28 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-01  5:27 [GIT PULL] turbostat 17.02.24 Len Brown
2017-03-01  5:27 ` [PATCH 01/44] tools/power turbostat: fix bugs in --add option Len Brown
2017-03-01  5:27   ` [PATCH 02/44] tools/power turbostat: Add --show and --hide parameters Len Brown
2017-03-01  5:27   ` [PATCH 03/44] tools/power turbostat: BYT does not have MSR_MISC_PWR_MGMT Len Brown
2017-03-01  5:27   ` Len Brown [this message]
2017-03-01  5:27   ` [PATCH 05/44] tools/power turbostat: Baytrail: remove debug line in quiet mode Len Brown
2017-03-01  5:27   ` [PATCH 06/44] tools/power turbostat: update MSR_PKG_CST_CONFIG_CONTROL decoding Len Brown
2017-03-01  5:27   ` [PATCH 07/44] x86: msr-index.h: Define MSR_PKG_CST_CONFIG_CONTROL Len Brown
2017-03-01  5:27   ` [PATCH 08/44] intel_idle: use new name for MSR_PKG_CST_CONFIG_CONTROL Len Brown
2017-03-01  5:27   ` [PATCH 09/44] tools/power turbostat: " Len Brown
2017-03-01  5:27   ` [PATCH 10/44] x86: msr-index.h: Remove unused MSR_NHM_SNB_PKG_CST_CFG_CTL Len Brown
2017-03-01  5:27   ` [PATCH 11/44] tools/power turbostat: Baytrail c-state support Len Brown
2017-03-01  5:27   ` [PATCH 12/44] tools/power turbostat: add precision to --debug frequency output Len Brown
2017-03-01  5:27   ` [PATCH 13/44] tools/power turbostat: further decode MSR_IA32_MISC_ENABLE Len Brown
2017-03-01  5:27   ` [PATCH 14/44] x86 msr-index.h: Define Atom specific core ratio MSR locations Len Brown
2017-03-01  5:27   ` [PATCH 15/44] intel_pstate: use MSR_ATOM_RATIOS definitions from msr-index.h Len Brown
2017-03-01  5:27   ` [PATCH 16/44] tools/power turbostat: dump Atom P-states correctly Len Brown
2017-03-01  5:27   ` [PATCH 17/44] tools/power turbostat: decode CPUID(6).TURBO Len Brown
2017-03-01  5:27   ` [PATCH 18/44] x86 msr_index.h: Define MSR_MISC_FEATURE_CONTROL Len Brown
2017-03-01  5:27   ` [PATCH 19/44] tools/power turbostat: decode MSR_MISC_FEATURE_CONTROL Len Brown
2017-03-01  5:27   ` [PATCH 20/44] tools/power turbostat: show all columns, independent of --debug Len Brown
2017-03-01  5:27   ` [PATCH 21/44] tools/power turbostat: print system config, unless --quiet Len Brown
2017-03-01  5:27   ` [PATCH 22/44] tools/power turbostat: use tsc_tweak everwhere it is needed Len Brown
2017-03-01  5:27   ` [PATCH 23/44] tools/power turbostat: bug fixes to --add, --show/--hide features Len Brown
2017-03-01  5:27   ` [PATCH 24/44] x86: intel-family.h: Add GEMINI_LAKE SOC Len Brown
2017-03-01 23:48     ` Andy Shevchenko
2017-03-01  5:27   ` [PATCH 25/44] tools/power turbostat: initial Gemini Lake SOC support Len Brown
2017-03-01  5:27   ` [PATCH 26/44] tools/power turbostat: Denverton: use HW CC1 counter, skip C3, C7 Len Brown
2017-03-01  5:27   ` [PATCH 27/44] tools/power turbostat: skip unused counters on SKX Len Brown
2017-03-01  5:27   ` [PATCH 28/44] tools/power turbostat: fix decoding for GLM, DNV, SKX turbo-ratio limits Len Brown
2017-03-01  5:27   ` [PATCH 29/44] tools/power turbostat: skip unused counters on BDX Len Brown
2017-03-01  5:27   ` [PATCH 30/44] tools/power turbostat: extend --add option to accept /sys path Len Brown
2017-03-01  5:27   ` [PATCH 31/44] tools/power turbostat: print sysfs C-state stats Len Brown
2017-03-01  5:27   ` [PATCH 32/44] tools/power turbostat: add --cpu parameter Len Brown
2017-03-01  5:27   ` [PATCH 33/44] tools/power turbostat: fix zero IRQ count shown in one-shot command mode Len Brown
2017-03-01  5:27   ` [PATCH 34/44] tools/power turbostat: Add --list option to show available header names Len Brown
2017-03-01  5:27   ` [PATCH 35/44] tools/power turbostat: use wide columns to display large numbers Len Brown
2017-03-01  5:27   ` [PATCH 36/44] tools/power turbostat: update --list feature Len Brown
2017-03-01  5:27   ` [PATCH 37/44] tools/power turbostat: turbostat.8 update Len Brown
2017-03-01  5:27   ` [PATCH 38/44] tools/power turbostat: move --Package and --processor into the --cpu option Len Brown
2017-03-01  5:27   ` [PATCH 39/44] tools/power turbostat: support "--hide C1" etc Len Brown
2017-03-01  5:27   ` [PATCH 40/44] tools/power turbostat: show package number, even without --debug Len Brown
2017-03-01  5:27   ` [PATCH 41/44] tools/power turbostat: dump p-state software config Len Brown
2017-03-01  5:27   ` [PATCH 42/44] tools/power turbostat: show error on exec Len Brown
2017-03-01  5:27   ` [PATCH 43/44] tools/power turbostat: bugfix: --add u32 was printed as u64 Len Brown
2017-03-01  5:27   ` [PATCH 44/44] tools/power turbostat: version 17.02.24 Len Brown

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