Project import
diff --git a/sane_schedstat/Android.mk b/sane_schedstat/Android.mk
new file mode 100644
index 0000000..c984b9f
--- /dev/null
+++ b/sane_schedstat/Android.mk
@@ -0,0 +1,12 @@
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := sane_schedstat.c
+
+LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
+LOCAL_MODULE_TAGS := debug
+LOCAL_MODULE := sane_schedstat
+LOCAL_CFLAGS := -Wno-unused-parameter
+
+include $(BUILD_EXECUTABLE)
diff --git a/sane_schedstat/NOTICE b/sane_schedstat/NOTICE
new file mode 100644
index 0000000..5d14293
--- /dev/null
+++ b/sane_schedstat/NOTICE
@@ -0,0 +1,190 @@
+
+ Copyright (c) 2010, 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.
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+ "Licensor" shall mean the copyright owner or entity authorized by
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+ "Legal Entity" shall mean the union of the acting entity and all
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+ 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.
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+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
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+ "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/sane_schedstat/sane_schedstat.c b/sane_schedstat/sane_schedstat.c
new file mode 100644
index 0000000..29d1063
--- /dev/null
+++ b/sane_schedstat/sane_schedstat.c
@@ -0,0 +1,157 @@
+/*
+** Copyright 2010 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.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** 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.
+*/
+
+
+/* Opens /proc/sched_stat and diff's the counters.
+ Currently support version 15, modify parse() to support other
+ versions
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <fcntl.h>
+
+#define MAX_CPU 2
+
+struct cpu_stat {
+ /* sched_yield() stats */
+ unsigned int yld_count; /* sched_yield() called */
+
+ /* schedule() stats */
+ unsigned int sched_switch; /* switched to expired queue and reused it */
+ unsigned int sched_count; /* schedule() called */
+ unsigned int sched_goidle; /* schedule() left the cpu idle */
+
+ /* try_to_wake_up() stats */
+ unsigned int ttwu_count; /* try_to_wake_up() called */
+ /* try_to_wake_up() called and found the process being awakened last ran on
+ * the waking cpu */
+ unsigned int ttwu_local;
+
+ /* latency stats */
+ unsigned long long cpu_time; /* time spent running by tasks (ms) */
+ unsigned long long run_delay; /* time spent waiting to run by tasks (ms) */
+ unsigned long pcount; /* number of tasks (not necessarily unique) given */
+};
+
+struct cpu_stat cpu_prev[MAX_CPU];
+struct cpu_stat cpu_delta[MAX_CPU];
+struct cpu_stat tmp;
+
+static const char *next_line(const char *b) {
+ while (1) {
+ switch (*b) {
+ case '\n':
+ return b + 1;
+ case '\0':
+ return NULL;
+ }
+ b++;
+ }
+}
+static int print() {
+ int i;
+
+ printf("CPU yield() schedule() switch idle ttwu() local cpu_time wait_time timeslices\n");
+ for (i=0; i<MAX_CPU; i++) {
+ printf(" %2d %7u %10u %6u %4u %8u %5u %9llu %9llu %10lu\n",
+ i,
+ cpu_delta[i].yld_count,
+ cpu_delta[i].sched_count, cpu_delta[i].sched_switch, cpu_delta[i].sched_goidle,
+ cpu_delta[i].ttwu_count, cpu_delta[i].ttwu_local,
+ cpu_delta[i].cpu_time / 1000000, cpu_delta[i].run_delay / 1000000, cpu_delta[i].pcount);
+ }
+ return 0;
+}
+
+static int parse_cpu_v15(const char *b) {
+ int cpu;
+
+ if (sscanf(b, "cpu%d %u %u %u %u %u %u %llu %llu %lu\n",
+ &cpu, &tmp.yld_count,
+ &tmp.sched_switch, &tmp.sched_count, &tmp.sched_goidle,
+ &tmp.ttwu_count, &tmp.ttwu_local,
+ &tmp.cpu_time, &tmp.run_delay, &tmp.pcount) != 10) {
+ printf("Could not parse %s\n", b);
+ return -1;
+ }
+
+ cpu_delta[cpu].yld_count = tmp.yld_count - cpu_prev[cpu].yld_count;
+ cpu_delta[cpu].sched_switch = tmp.sched_switch - cpu_prev[cpu].sched_switch;
+ cpu_delta[cpu].sched_count = tmp.sched_count - cpu_prev[cpu].sched_count;
+ cpu_delta[cpu].sched_goidle = tmp.sched_goidle - cpu_prev[cpu].sched_goidle;
+ cpu_delta[cpu].ttwu_count = tmp.ttwu_count - cpu_prev[cpu].ttwu_count;
+ cpu_delta[cpu].ttwu_local = tmp.ttwu_local - cpu_prev[cpu].ttwu_local;
+ cpu_delta[cpu].cpu_time = tmp.cpu_time - cpu_prev[cpu].cpu_time;
+ cpu_delta[cpu].run_delay = tmp.run_delay - cpu_prev[cpu].run_delay;
+ cpu_delta[cpu].pcount = tmp.pcount - cpu_prev[cpu].pcount;
+
+ cpu_prev[cpu] = tmp;
+ return 0;
+}
+
+
+static int parse(const char *b) {
+ unsigned int version;
+ unsigned long long ts;
+
+ if (sscanf(b, "version %u\n", &version) != 1) {
+ printf("Could not parse version\n");
+ return -1;
+ }
+ switch (version) {
+ case 15:
+ b = next_line(b);
+ if (!b || sscanf(b, "timestamp %llu\n", &ts) != 1) {
+ printf("Could not parse timestamp\n");
+ return -1;
+ }
+ while (1) {
+ b = next_line(b);
+ if (!b) break;
+ if (b[0] == 'c') {
+ if (parse_cpu_v15(b)) return -1;
+ }
+ }
+ break;
+ default:
+ printf("Can not handle version %u\n", version);
+ return -1;
+ }
+ return 0;
+}
+
+int main(int argc, char **argv) {
+ int i;
+ int fd;
+ char buf[4096];
+
+ while (1) {
+ fd = open("/proc/schedstat", O_RDONLY);
+ if (fd < 0) return -1;
+ i = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ buf[i] = '\0';
+ if (parse(buf)) return -1;
+ print();
+ sleep(1);
+ }
+ return 0;
+}
