Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutils

* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutils:
  cpupower: Do detect IDA (opportunistic processor performance) via cpuid
  cpupower: Show Intel turbo ratio support via ./cpupower frequency-info
  cpupowerutils: increase MAX_LINE_LEN
  cpupower: Rename package from cpupowerutils to cpupower
  cpupowerutils: Rename: libcpufreq->libcpupower
  cpupowerutils: use kernel version-derived version string
  cpupowerutils: utils - ConfigStyle bugfixes
  cpupowerutils: helpers - ConfigStyle bugfixes
  cpupowerutils: idle_monitor - ConfigStyle bugfixes
  cpupowerutils: lib - ConfigStyle bugfixes
  cpupowerutils: bench - ConfigStyle bugfixes
  cpupowerutils: do not update po files on each and every compile
  cpupowerutils: remove ccdv, use kernel quiet/verbose mechanism
  cpupowerutils: use COPYING, CREDITS from top-level directory
  cpupowerutils - cpufrequtils extended with quite some features

1 files changed, 194 insertions, 0 deletions

diff --git a/tools/power/cpupower/bench/benchmark.c b/tools/power/cpupower/bench/benchmark.c
new file mode 100644
index 000000000000..81b1c48607d9
--- /dev/null
+++ b/tools/power/cpupower/bench/benchmark.c
@@ -0,0 +1,194 @@
+/*  cpufreq-bench CPUFreq microbenchmark
+ *
+ *  Copyright (C) 2008 Christian Kornacker <ckornacker@suse.de>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <math.h>
+
+#include "config.h"
+#include "system.h"
+#include "benchmark.h"
+
+/* Print out progress if we log into a file */
+#define show_progress(total_time, progress_time)        \
+if (config->output != stdout) {                         \
+        fprintf(stdout, "Progress: %02lu %%\r",         \
+                (progress_time * 100) / total_time);    \
+        fflush(stdout);                                 \
+}
+
+/**
+ * compute how many rounds of calculation we should do
+ * to get the given load time
+ *
+ * @param load aimed load time in µs
+ *
+ * @retval rounds of calculation
+ **/
+
+unsigned int calculate_timespace(long load, struct config *config)
+{
+        int i;
+        long long now, then;
+        unsigned int estimated = GAUGECOUNT;
+        unsigned int rounds = 0;
+        unsigned int timed = 0;
+
+        if (config->verbose)
+                printf("calibrating load of %lius, please wait...\n", load);
+
+        /* get the initial calculation time for a specific number of rounds */
+        now = get_time();
+        ROUNDS(estimated);
+        then = get_time();
+
+        timed = (unsigned int)(then - now);
+
+        /* approximation of the wanted load time by comparing with the
+         * initial calculation time */
+        for (i = 0; i < 4; i++) {
+                rounds = (unsigned int)(load * estimated / timed);
+                dprintf("calibrating with %u rounds\n", rounds);
+                now = get_time();
+                ROUNDS(rounds);
+                then = get_time();
+
+                timed = (unsigned int)(then - now);
+                estimated = rounds;
+        }
+        if (config->verbose)
+                printf("calibration done\n");
+
+        return estimated;
+}
+
+/**
+ * benchmark
+ * generates a specific sleep an load time with the performance
+ * governor and compares the used time for same calculations done
+ * with the configured powersave governor
+ *
+ * @param config config values for the benchmark
+ *
+ **/
+
+void start_benchmark(struct config *config)
+{
+        unsigned int _round, cycle;
+        long long now, then;
+        long sleep_time = 0, load_time = 0;
+        long performance_time = 0, powersave_time = 0;
+        unsigned int calculations;
+        unsigned long total_time = 0, progress_time = 0;
+
+        sleep_time = config->sleep;
+        load_time = config->load;
+
+        /* For the progress bar */
+        for (_round = 1; _round <= config->rounds; _round++)
+                total_time += _round * (config->sleep + config->load);
+        total_time *= 2; /* powersave and performance cycles */
+
+        for (_round = 0; _round < config->rounds; _round++) {
+                performance_time = 0LL;
+                powersave_time = 0LL;
+
+                show_progress(total_time, progress_time);
+
+                /* set the cpufreq governor to "performance" which disables
+                 * P-State switching. */
+                if (set_cpufreq_governor("performance", config->cpu) != 0)
+                        return;
+
+                /* calibrate the calculation time. the resulting calculation
+                 * _rounds should produce a load which matches the configured
+                 * load time */
+                calculations = calculate_timespace(load_time, config);
+
+                if (config->verbose)
+                        printf("_round %i: doing %u cycles with %u calculations"
+                               " for %lius\n", _round + 1, config->cycles,
+                               calculations, load_time);
+
+                fprintf(config->output, "%u %li %li ",
+                        _round, load_time, sleep_time);
+
+                if (config->verbose)
+                        printf("avarage: %lius, rps:%li\n",
+                                load_time / calculations,
+                                1000000 * calculations / load_time);
+
+                /* do some sleep/load cycles with the performance governor */
+                for (cycle = 0; cycle < config->cycles; cycle++) {
+                        now = get_time();
+                        usleep(sleep_time);
+                        ROUNDS(calculations);
+                        then = get_time();
+                        performance_time += then - now - sleep_time;
+                        if (config->verbose)
+                                printf("performance cycle took %lius, "
+                                        "sleep: %lius, "
+                                        "load: %lius, rounds: %u\n",
+                                        (long)(then - now), sleep_time,
+                                        load_time, calculations);
+                }
+                fprintf(config->output, "%li ",
+                        performance_time / config->cycles);
+
+                progress_time += sleep_time + load_time;
+                show_progress(total_time, progress_time);
+
+                /* set the powersave governor which activates P-State switching
+                 * again */
+                if (set_cpufreq_governor(config->governor, config->cpu) != 0)
+                        return;
+
+                /* again, do some sleep/load cycles with the
+                 * powersave governor */
+                for (cycle = 0; cycle < config->cycles; cycle++) {
+                        now = get_time();
+                        usleep(sleep_time);
+                        ROUNDS(calculations);
+                        then = get_time();
+                        powersave_time += then - now - sleep_time;
+                        if (config->verbose)
+                                printf("powersave cycle took %lius, "
+                                        "sleep: %lius, "
+                                        "load: %lius, rounds: %u\n",
+                                        (long)(then - now), sleep_time,
+                                        load_time, calculations);
+                }
+
+                progress_time += sleep_time + load_time;
+
+                /* compare the avarage sleep/load cycles  */
+                fprintf(config->output, "%li ",
+                        powersave_time / config->cycles);
+                fprintf(config->output, "%.3f\n",
+                        performance_time * 100.0 / powersave_time);
+                fflush(config->output);
+
+                if (config->verbose)
+                        printf("performance is at %.2f%%\n",
+                                performance_time * 100.0 / powersave_time);
+
+                sleep_time += config->sleep_step;
+                load_time += config->load_step;
+        }
+}