Project import
diff --git a/cpustats/Android.mk b/cpustats/Android.mk
new file mode 100644
index 0000000..2789989
--- /dev/null
+++ b/cpustats/Android.mk
@@ -0,0 +1,10 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := cpustats.c
+
+LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
+LOCAL_MODULE_TAGS := debug
+LOCAL_MODULE := cpustats
+
+include $(BUILD_EXECUTABLE)
diff --git a/cpustats/NOTICE b/cpustats/NOTICE
new file mode 100644
index 0000000..c77f135
--- /dev/null
+++ b/cpustats/NOTICE
@@ -0,0 +1,190 @@
+
+ Copyright (c) 2012, The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
diff --git a/cpustats/cpustats.c b/cpustats/cpustats.c
new file mode 100644
index 0000000..32d75b2
--- /dev/null
+++ b/cpustats/cpustats.c
@@ -0,0 +1,430 @@
+/*
+ * Copyright (c) 2012, The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google, Inc. nor the names of its contributors
+ * may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define MAX_BUF_SIZE 64
+
+struct freq_info {
+ unsigned freq;
+ long unsigned time;
+};
+
+struct cpu_info {
+ long unsigned utime, ntime, stime, itime, iowtime, irqtime, sirqtime;
+ struct freq_info *freqs;
+ int freq_count;
+};
+
+#define die(...) { fprintf(stderr, __VA_ARGS__); exit(EXIT_FAILURE); }
+
+static struct cpu_info old_total_cpu, new_total_cpu, *old_cpus, *new_cpus;
+static int cpu_count, delay, iterations;
+static char minimal, aggregate_freq_stats;
+
+static int get_cpu_count();
+static int get_cpu_count_from_file(char *filename);
+static long unsigned get_cpu_total_time(struct cpu_info *cpu);
+static int get_freq_scales_count(int cpu);
+static void print_stats();
+static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu,
+ char print_freq);
+static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu);
+static void read_stats();
+static void read_freq_stats(int cpu);
+static char should_aggregate_freq_stats();
+static char should_print_freq_stats();
+static void usage(char *cmd);
+
+int main(int argc, char *argv[]) {
+ struct cpu_info *tmp_cpus, tmp_total_cpu;
+ int i, freq_count;
+
+ delay = 3;
+ iterations = -1;
+ minimal = 0;
+ aggregate_freq_stats = 0;
+
+ for (i = 0; i < argc; i++) {
+ if (!strcmp(argv[i], "-n")) {
+ if (i + 1 >= argc) {
+ fprintf(stderr, "Option -n expects an argument.\n");
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+ iterations = atoi(argv[++i]);
+ continue;
+ }
+ if (!strcmp(argv[i], "-d")) {
+ if (i + 1 >= argc) {
+ fprintf(stderr, "Option -d expects an argument.\n");
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+ delay = atoi(argv[++i]);
+ continue;
+ }
+ if (!strcmp(argv[i], "-m")) {
+ minimal = 1;
+ }
+ if (!strcmp(argv[i], "-h")) {
+ usage(argv[0]);
+ exit(EXIT_SUCCESS);
+ }
+ }
+
+ cpu_count = get_cpu_count();
+
+ old_cpus = malloc(sizeof(struct cpu_info) * cpu_count);
+ if (!old_cpus) die("Could not allocate struct cpu_info\n");
+ new_cpus = malloc(sizeof(struct cpu_info) * cpu_count);
+ if (!new_cpus) die("Could not allocate struct cpu_info\n");
+
+ for (i = 0; i < cpu_count; i++) {
+ old_cpus[i].freq_count = new_cpus[i].freq_count = get_freq_scales_count(i);
+ new_cpus[i].freqs = malloc(sizeof(struct freq_info) * new_cpus[i].freq_count);
+ if (!new_cpus[i].freqs) die("Could not allocate struct freq_info\n");
+ old_cpus[i].freqs = malloc(sizeof(struct freq_info) * old_cpus[i].freq_count);
+ if (!old_cpus[i].freqs) die("Could not allocate struct freq_info\n");
+ }
+
+ // Read stats without aggregating freq stats in the total cpu
+ read_stats();
+
+ aggregate_freq_stats = should_aggregate_freq_stats();
+ if (aggregate_freq_stats) {
+ old_total_cpu.freq_count = new_total_cpu.freq_count = new_cpus[0].freq_count;
+ new_total_cpu.freqs = malloc(sizeof(struct freq_info) * new_total_cpu.freq_count);
+ if (!new_total_cpu.freqs) die("Could not allocate struct freq_info\n");
+ old_total_cpu.freqs = malloc(sizeof(struct freq_info) * old_total_cpu.freq_count);
+ if (!old_total_cpu.freqs) die("Could not allocate struct freq_info\n");
+
+ // Read stats again with aggregating freq stats in the total cpu
+ read_stats();
+ }
+
+ while ((iterations == -1) || (iterations-- > 0)) {
+ // Swap new and old cpu buffers;
+ tmp_total_cpu = old_total_cpu;
+ old_total_cpu = new_total_cpu;
+ new_total_cpu = tmp_total_cpu;
+
+ tmp_cpus = old_cpus;
+ old_cpus = new_cpus;
+ new_cpus = tmp_cpus;
+
+ sleep(delay);
+ read_stats();
+ print_stats();
+ }
+
+ // Clean up
+ if (aggregate_freq_stats) {
+ free(new_total_cpu.freqs);
+ free(old_total_cpu.freqs);
+ }
+ for (i = 0; i < cpu_count; i++) {
+ free(new_cpus[i].freqs);
+ free(old_cpus[i].freqs);
+ }
+ free(new_cpus);
+ free(old_cpus);
+
+ return 0;
+}
+
+/*
+ * Get the number of CPUs of the system.
+ *
+ * Uses the two files /sys/devices/system/cpu/present and
+ * /sys/devices/system/cpu/online to determine the number of CPUs. Expects the
+ * format of both files to be either 0 or 0-N where N+1 is the number of CPUs.
+ *
+ * Exits if the present CPUs is not equal to the online CPUs
+ */
+static int get_cpu_count() {
+ int cpu_count = get_cpu_count_from_file("/sys/devices/system/cpu/present");
+ if (cpu_count != get_cpu_count_from_file("/sys/devices/system/cpu/online")) {
+ die("present cpus != online cpus\n");
+ }
+ return cpu_count;
+}
+
+/*
+ * Get the number of CPUs from a given filename.
+ */
+static int get_cpu_count_from_file(char *filename) {
+ FILE *file;
+ char line[MAX_BUF_SIZE];
+ int cpu_count;
+
+ file = fopen(filename, "r");
+ if (!file) die("Could not open %s\n", filename);
+ if (!fgets(line, MAX_BUF_SIZE, file)) die("Could not get %s contents\n", filename);
+ fclose(file);
+
+ if (strcmp(line, "0\n") == 0) {
+ return 1;
+ }
+
+ if (1 == sscanf(line, "0-%d\n", &cpu_count)) {
+ return cpu_count + 1;
+ }
+
+ die("Unexpected input in file %s (%s).\n", filename, line);
+ return -1;
+}
+
+/*
+ * Get the number of frequency states a given CPU can be scaled to.
+ */
+static int get_freq_scales_count(int cpu) {
+ FILE *file;
+ char filename[MAX_BUF_SIZE];
+ long unsigned freq;
+ int count = 0;
+
+ sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu);
+ file = fopen(filename, "r");
+ if (!file) die("Could not open %s\n", filename);
+ do {
+ freq = 0;
+ fscanf(file, "%lu %*d\n", &freq);
+ if (freq) count++;
+ } while(freq);
+ fclose(file);
+
+ return count;
+}
+
+/*
+ * Read the CPU and frequency stats for all cpus.
+ */
+static void read_stats() {
+ FILE *file;
+ char scanline[MAX_BUF_SIZE];
+ int i;
+
+ file = fopen("/proc/stat", "r");
+ if (!file) die("Could not open /proc/stat.\n");
+ fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu %*d %*d %*d\n",
+ &new_total_cpu.utime, &new_total_cpu.ntime, &new_total_cpu.stime, &new_total_cpu.itime,
+ &new_total_cpu.iowtime, &new_total_cpu.irqtime, &new_total_cpu.sirqtime);
+ if (aggregate_freq_stats) {
+ for (i = 0; i < new_total_cpu.freq_count; i++) {
+ new_total_cpu.freqs[i].time = 0;
+ }
+ }
+
+ for (i = 0; i < cpu_count; i++) {
+ sprintf(scanline, "cpu%d %%lu %%lu %%lu %%lu %%lu %%lu %%lu %%*d %%*d %%*d\n", i);
+ fscanf(file, scanline, &new_cpus[i].utime, &new_cpus[i].ntime, &new_cpus[i].stime,
+ &new_cpus[i].itime, &new_cpus[i].iowtime, &new_cpus[i].irqtime,
+ &new_cpus[i].sirqtime);
+ read_freq_stats(i);
+ }
+ fclose(file);
+}
+
+/*
+ * Read the frequency stats for a given cpu.
+ */
+static void read_freq_stats(int cpu) {
+ FILE *file;
+ char filename[MAX_BUF_SIZE];
+ int i;
+
+ sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu);
+ file = fopen(filename, "r");
+ if (!file) die("Could not open %s\n", filename);
+ for (i = 0; i < new_cpus[cpu].freq_count; i++) {
+ fscanf(file, "%u %lu\n", &new_cpus[cpu].freqs[i].freq,
+ &new_cpus[cpu].freqs[i].time);
+ if (aggregate_freq_stats) {
+ new_total_cpu.freqs[i].freq = new_cpus[cpu].freqs[i].freq;
+ new_total_cpu.freqs[i].time += new_cpus[cpu].freqs[i].time;
+ }
+ }
+ fclose(file);
+}
+
+/*
+ * Get the sum of the cpu time from all categories.
+ */
+static long unsigned get_cpu_total_time(struct cpu_info *cpu) {
+ return (cpu->utime + cpu->ntime + cpu->stime + cpu->itime + cpu->iowtime + cpu->irqtime +
+ cpu->sirqtime);
+}
+
+/*
+ * Print the stats for all CPUs.
+ */
+static void print_stats() {
+ char label[8];
+ int i, j;
+ char print_freq;
+
+ print_freq = should_print_freq_stats();
+
+ print_cpu_stats("Total", &new_total_cpu, &old_total_cpu, 1);
+ for (i = 0; i < cpu_count; i++) {
+ sprintf(label, "cpu%d", i);
+ print_cpu_stats(label, &new_cpus[i], &old_cpus[i], print_freq);
+ }
+ printf("\n");
+}
+
+/*
+ * Print the stats for a single CPU.
+ */
+static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu,
+ char print_freq) {
+ long int total_delta_time;
+
+ if (!minimal) {
+ total_delta_time = get_cpu_total_time(new_cpu) - get_cpu_total_time(old_cpu);
+ printf("%s: User %ld + Nice %ld + Sys %ld + Idle %ld + IOW %ld + IRQ %ld + SIRQ %ld = "
+ "%ld\n", label,
+ new_cpu->utime - old_cpu->utime,
+ new_cpu->ntime - old_cpu->ntime,
+ new_cpu->stime - old_cpu->stime,
+ new_cpu->itime - old_cpu->itime,
+ new_cpu->iowtime - old_cpu->iowtime,
+ new_cpu->irqtime - old_cpu->irqtime,
+ new_cpu->sirqtime - old_cpu->sirqtime,
+ total_delta_time);
+ if (print_freq) {
+ print_freq_stats(new_cpu, old_cpu);
+ }
+ } else {
+ printf("%s,%ld,%ld,%ld,%ld,%ld,%ld,%ld", label,
+ new_cpu->utime - old_cpu->utime,
+ new_cpu->ntime - old_cpu->ntime,
+ new_cpu->stime - old_cpu->stime,
+ new_cpu->itime - old_cpu->itime,
+ new_cpu->iowtime - old_cpu->iowtime,
+ new_cpu->irqtime - old_cpu->irqtime,
+ new_cpu->sirqtime - old_cpu->sirqtime);
+ print_freq_stats(new_cpu, old_cpu);
+ printf("\n");
+ }
+}
+
+/*
+ * Print the CPU stats for a single CPU.
+ */
+static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu) {
+ long int delta_time, total_delta_time;
+ int i;
+
+ if (new_cpu->freq_count > 0) {
+ if (!minimal) {
+ total_delta_time = 0;
+ printf(" ");
+ for (i = 0; i < new_cpu->freq_count; i++) {
+ delta_time = new_cpu->freqs[i].time - old_cpu->freqs[i].time;
+ total_delta_time += delta_time;
+ printf("%ukHz %ld", new_cpu->freqs[i].freq, delta_time);
+ if (i + 1 != new_cpu->freq_count) {
+ printf(" + \n ");
+ } else {
+ printf(" = ");
+ }
+ }
+ printf("%ld\n", total_delta_time);
+ } else {
+ for (i = 0; i < new_cpu->freq_count; i++) {
+ printf(",%u,%ld", new_cpu->freqs[i].freq,
+ new_cpu->freqs[i].time - old_cpu->freqs[i].time);
+ }
+ }
+ }
+}
+
+/*
+ * Determine if frequency stats should be printed.
+ *
+ * If the frequency stats are different between CPUs, the stats should be
+ * printed for each CPU, else only the aggregate frequency stats should be
+ * printed.
+ */
+static char should_print_freq_stats() {
+ int i, j;
+
+ for (i = 1; i < cpu_count; i++) {
+ for (j = 0; j < new_cpus[i].freq_count; j++) {
+ if (new_cpus[i].freqs[j].time - old_cpus[i].freqs[j].time !=
+ new_cpus[0].freqs[j].time - old_cpus[0].freqs[j].time) {
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * Determine if the frequency stats should be aggregated.
+ *
+ * Only aggregate the frequency stats in the total cpu stats if the frequencies
+ * reported by all CPUs are identical. Must be called after read_stats() has
+ * been called once.
+ */
+static char should_aggregate_freq_stats() {
+ int i, j;
+
+ for (i = 1; i < cpu_count; i++) {
+ if (new_cpus[i].freq_count != new_cpus[0].freq_count) {
+ return 0;
+ }
+ for (j = 0; j < new_cpus[i].freq_count; j++) {
+ if (new_cpus[i].freqs[j].freq != new_cpus[0].freqs[j].freq) {
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+
+/*
+ * Print the usage message.
+ */
+static void usage(char *cmd) {
+ fprintf(stderr, "Usage %s [ -n iterations ] [ -d delay ] [ -c cpu ] [ -m ] [ -h ]\n"
+ " -n num Updates to show before exiting.\n"
+ " -d num Seconds to wait between updates.\n"
+ " -m Display minimal output.\n"
+ " -h Display this help screen.\n",
+ cmd);
+}
