--- /dev/null
+/*
+ * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ * Licensed under the terms of the GNU GPL License version 2.
+ *
+ * Based on SandyBridge monitor. Implements the new package C-states
+ * (PC8, PC9, PC10) coming with a specific Haswell (family 0x45) CPU.
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "helpers/helpers.h"
+#include "idle_monitor/cpupower-monitor.h"
+
+#define MSR_PKG_C8_RESIDENCY 0x00000630
+#define MSR_PKG_C9_RESIDENCY 0x00000631
+#define MSR_PKG_C10_RESIDENCY 0x00000632
+
+#define MSR_TSC 0x10
+
+enum intel_hsw_ext_id { PC8 = 0, PC9, PC10, HSW_EXT_CSTATE_COUNT,
+ TSC = 0xFFFF };
+
+static int hsw_ext_get_count_percent(unsigned int self_id, double *percent,
+ unsigned int cpu);
+
+static cstate_t hsw_ext_cstates[HSW_EXT_CSTATE_COUNT] = {
+ {
+ .name = "PC8",
+ .desc = N_("Processor Package C8"),
+ .id = PC8,
+ .range = RANGE_PACKAGE,
+ .get_count_percent = hsw_ext_get_count_percent,
+ },
+ {
+ .name = "PC9",
+ .desc = N_("Processor Package C9"),
+ .desc = N_("Processor Package C2"),
+ .id = PC9,
+ .range = RANGE_PACKAGE,
+ .get_count_percent = hsw_ext_get_count_percent,
+ },
+ {
+ .name = "PC10",
+ .desc = N_("Processor Package C10"),
+ .id = PC10,
+ .range = RANGE_PACKAGE,
+ .get_count_percent = hsw_ext_get_count_percent,
+ },
+};
+
+static unsigned long long tsc_at_measure_start;
+static unsigned long long tsc_at_measure_end;
+static unsigned long long *previous_count[HSW_EXT_CSTATE_COUNT];
+static unsigned long long *current_count[HSW_EXT_CSTATE_COUNT];
+/* valid flag for all CPUs. If a MSR read failed it will be zero */
+static int *is_valid;
+
+static int hsw_ext_get_count(enum intel_hsw_ext_id id, unsigned long long *val,
+ unsigned int cpu)
+{
+ int msr;
+
+ switch (id) {
+ case PC8:
+ msr = MSR_PKG_C8_RESIDENCY;
+ break;
+ case PC9:
+ msr = MSR_PKG_C9_RESIDENCY;
+ break;
+ case PC10:
+ msr = MSR_PKG_C10_RESIDENCY;
+ break;
+ case TSC:
+ msr = MSR_TSC;
+ break;
+ default:
+ return -1;
+ };
+ if (read_msr(cpu, msr, val))
+ return -1;
+ return 0;
+}
+
+static int hsw_ext_get_count_percent(unsigned int id, double *percent,
+ unsigned int cpu)
+{
+ *percent = 0.0;
+
+ if (!is_valid[cpu])
+ return -1;
+
+ *percent = (100.0 *
+ (current_count[id][cpu] - previous_count[id][cpu])) /
+ (tsc_at_measure_end - tsc_at_measure_start);
+
+ dprint("%s: previous: %llu - current: %llu - (%u)\n",
+ hsw_ext_cstates[id].name, previous_count[id][cpu],
+ current_count[id][cpu], cpu);
+
+ dprint("%s: tsc_diff: %llu - count_diff: %llu - percent: %2.f (%u)\n",
+ hsw_ext_cstates[id].name,
+ (unsigned long long) tsc_at_measure_end - tsc_at_measure_start,
+ current_count[id][cpu] - previous_count[id][cpu],
+ *percent, cpu);
+
+ return 0;
+}
+
+static int hsw_ext_start(void)
+{
+ int num, cpu;
+ unsigned long long val;
+
+ for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+ for (cpu = 0; cpu < cpu_count; cpu++) {
+ hsw_ext_get_count(num, &val, cpu);
+ previous_count[num][cpu] = val;
+ }
+ }
+ hsw_ext_get_count(TSC, &tsc_at_measure_start, 0);
+ return 0;
+}
+
+static int hsw_ext_stop(void)
+{
+ unsigned long long val;
+ int num, cpu;
+
+ hsw_ext_get_count(TSC, &tsc_at_measure_end, 0);
+
+ for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+ for (cpu = 0; cpu < cpu_count; cpu++) {
+ is_valid[cpu] = !hsw_ext_get_count(num, &val, cpu);
+ current_count[num][cpu] = val;
+ }
+ }
+ return 0;
+}
+
+struct cpuidle_monitor intel_hsw_ext_monitor;
+
+static struct cpuidle_monitor *hsw_ext_register(void)
+{
+ int num;
+
+ if (cpupower_cpu_info.vendor != X86_VENDOR_INTEL
+ || cpupower_cpu_info.family != 6)
+ return NULL;
+
+ switch (cpupower_cpu_info.model) {
+ case 0x45: /* HSW */
+ break;
+ default:
+ return NULL;
+ }
+
+ is_valid = calloc(cpu_count, sizeof(int));
+ for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+ previous_count[num] = calloc(cpu_count,
+ sizeof(unsigned long long));
+ current_count[num] = calloc(cpu_count,
+ sizeof(unsigned long long));
+ }
+ intel_hsw_ext_monitor.name_len = strlen(intel_hsw_ext_monitor.name);
+ return &intel_hsw_ext_monitor;
+}
+
+void hsw_ext_unregister(void)
+{
+ int num;
+ free(is_valid);
+ for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+ free(previous_count[num]);
+ free(current_count[num]);
+ }
+}
+
+struct cpuidle_monitor intel_hsw_ext_monitor = {
+ .name = "HaswellExtended",
+ .hw_states = hsw_ext_cstates,
+ .hw_states_num = HSW_EXT_CSTATE_COUNT,
+ .start = hsw_ext_start,
+ .stop = hsw_ext_stop,
+ .do_register = hsw_ext_register,
+ .unregister = hsw_ext_unregister,
+ .needs_root = 1,
+ .overflow_s = 922000000 /* 922337203 seconds TSC overflow
+ at 20GHz */
+};
+#endif /* defined(__i386__) || defined(__x86_64__) */
projects / linux-imx.git / commitdiff