diff options
author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:29:04 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:29:04 -0800 |
commit | 19ddb4b1680760e2d6863c3003976882ebd9d0fa (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /latencytop | |
parent | dbdf1561ad9b4c6100fb93028929ece02bf66a74 (diff) | |
download | extras-19ddb4b1680760e2d6863c3003976882ebd9d0fa.tar.gz |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'latencytop')
-rw-r--r-- | latencytop/Android.mk | 26 | ||||
-rw-r--r-- | latencytop/MODULE_LICENSE_APACHE2 | 0 | ||||
-rw-r--r-- | latencytop/NOTICE | 190 | ||||
-rw-r--r-- | latencytop/latencytop.c | 442 |
4 files changed, 0 insertions, 658 deletions
diff --git a/latencytop/Android.mk b/latencytop/Android.mk deleted file mode 100644 index 84bef410..00000000 --- a/latencytop/Android.mk +++ /dev/null @@ -1,26 +0,0 @@ -# Copyright (C) 2008 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. - -LOCAL_PATH:= $(call my-dir) -include $(CLEAR_VARS) - -LOCAL_SRC_FILES := latencytop.c - -LOCAL_MODULE := latencytop - -LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES) - -LOCAL_MODULE_TAGS := debug tests - -include $(BUILD_EXECUTABLE) diff --git a/latencytop/MODULE_LICENSE_APACHE2 b/latencytop/MODULE_LICENSE_APACHE2 deleted file mode 100644 index e69de29b..00000000 --- a/latencytop/MODULE_LICENSE_APACHE2 +++ /dev/null diff --git a/latencytop/NOTICE b/latencytop/NOTICE deleted file mode 100644 index c5b1efa7..00000000 --- a/latencytop/NOTICE +++ /dev/null @@ -1,190 +0,0 @@ - - Copyright (c) 2005-2008, 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/latencytop/latencytop.c b/latencytop/latencytop.c deleted file mode 100644 index 78d7c71d..00000000 --- a/latencytop/latencytop.c +++ /dev/null @@ -1,442 +0,0 @@ -/* - * Copyright (C) 2008 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. - */ - -#include <ctype.h> -#include <dirent.h> -#include <errno.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> - -#define MAX_LINE 512 -#define MAX_FILENAME 64 - -const char *EXPECTED_VERSION = "Latency Top version : v0.1\n"; -const char *SYSCTL_FILE = "/proc/sys/kernel/latencytop"; -const char *GLOBAL_STATS_FILE = "/proc/latency_stats"; -const char *THREAD_STATS_FILE_FORMAT = "/proc/%d/task/%d/latency"; - -struct latency_entry { - struct latency_entry *next; - unsigned long count; - unsigned long max; - unsigned long total; - char reason[MAX_LINE]; -}; - -static inline void check_latencytop() { } - -static struct latency_entry *read_global_stats(struct latency_entry *list, int erase); -static struct latency_entry *read_process_stats(struct latency_entry *list, int erase, int pid); -static struct latency_entry *read_thread_stats(struct latency_entry *list, int erase, int pid, int tid, int fatal); - -static struct latency_entry *alloc_latency_entry(void); -static void free_latency_entry(struct latency_entry *e); - -static void set_latencytop(int on); -static struct latency_entry *read_latency_file(FILE *f, struct latency_entry *list); -static void erase_latency_file(FILE *f); - -static struct latency_entry *find_latency_entry(struct latency_entry *e, char *reason); -static void print_latency_entries(struct latency_entry *head); - -static void signal_handler(int sig); -static void disable_latencytop(void); - -static int numcmp(const long long a, const long long b); -static int lat_cmp(const void *a, const void *b); - -static void clear_screen(void); -static void usage(const char *cmd); - -struct latency_entry *free_entries; - -int main(int argc, char *argv[]) { - struct latency_entry *e; - int delay, iterations; - int pid, tid; - int count, erase; - int i; - - delay = 1; - iterations = 0; - pid = tid = 0; - - for (i = 1; i < argc; i++) { - if (!strcmp(argv[i], "-d")) { - if (i >= argc - 1) { - fprintf(stderr, "Option -d expects an argument.\n"); - exit(EXIT_FAILURE); - } - delay = atoi(argv[++i]); - continue; - } - if (!strcmp(argv[i], "-n")) { - if (i >= argc - 1) { - fprintf(stderr, "Option -n expects an argument.\n"); - exit(EXIT_FAILURE); - } - iterations = atoi(argv[++i]); - continue; - } - if (!strcmp(argv[i], "-h")) { - usage(argv[0]); - exit(EXIT_SUCCESS); - } - if (!strcmp(argv[i], "-p")) { - if (i >= argc - 1) { - fprintf(stderr, "Option -p expects an argument.\n"); - exit(EXIT_FAILURE); - } - pid = atoi(argv[++i]); - continue; - } - if (!strcmp(argv[i], "-t")) { - if (i >= argc - 1) { - fprintf(stderr, "Option -t expects an argument.\n"); - exit(EXIT_FAILURE); - } - tid = atoi(argv[++i]); - continue; - } - fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]); - usage(argv[0]); - exit(EXIT_FAILURE); - } - - if (tid && !pid) { - fprintf(stderr, "If you provide a thread ID with -t, you must provide a process ID with -p.\n"); - exit(EXIT_FAILURE); - } - - check_latencytop(); - - free_entries = NULL; - - signal(SIGINT, &signal_handler); - signal(SIGTERM, &signal_handler); - - atexit(&disable_latencytop); - - set_latencytop(1); - - count = 0; - erase = 1; - - while ((iterations == 0) || (count++ < iterations)) { - - sleep(delay); - - e = NULL; - if (pid) { - if (tid) { - e = read_thread_stats(e, erase, pid, tid, 1); - } else { - e = read_process_stats(e, erase, pid); - } - } else { - e = read_global_stats(e, erase); - } - erase = 0; - - clear_screen(); - if (pid) { - if (tid) { - printf("Latencies for thread %d in process %d:\n", tid, pid); - } else { - printf("Latencies for process %d:\n", pid); - } - } else { - printf("Latencies across all processes:\n"); - } - print_latency_entries(e); - } - - set_latencytop(0); - - return 0; -} - -static struct latency_entry *read_global_stats(struct latency_entry *list, int erase) { - FILE *f; - struct latency_entry *e; - - if (erase) { - f = fopen(GLOBAL_STATS_FILE, "w"); - if (!f) { - fprintf(stderr, "Could not open global latency stats file: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - fprintf(f, "erase\n"); - fclose(f); - } - - f = fopen(GLOBAL_STATS_FILE, "r"); - if (!f) { - fprintf(stderr, "Could not open global latency stats file: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - - e = read_latency_file(f, list); - - fclose(f); - - return e; -} - -static struct latency_entry *read_process_stats(struct latency_entry *list, int erase, int pid) { - char dirname[MAX_FILENAME]; - DIR *dir; - struct dirent *ent; - struct latency_entry *e; - int tid; - - sprintf(dirname, "/proc/%d/task", pid); - dir = opendir(dirname); - if (!dir) { - fprintf(stderr, "Could not open task dir for process %d.\n", pid); - fprintf(stderr, "Perhaps the process has terminated?\n"); - exit(EXIT_FAILURE); - } - - e = list; - while ((ent = readdir(dir))) { - if (!isdigit(ent->d_name[0])) - continue; - - tid = atoi(ent->d_name); - - e = read_thread_stats(e, erase, pid, tid, 0); - } - - closedir(dir); - - return e; -} - -static struct latency_entry *read_thread_stats(struct latency_entry *list, int erase, int pid, int tid, int fatal) { - char filename[MAX_FILENAME]; - FILE *f; - struct latency_entry *e; - - sprintf(filename, THREAD_STATS_FILE_FORMAT, pid, tid); - - if (erase) { - f = fopen(filename, "w"); - if (!f) { - if (fatal) { - fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno)); - fprintf(stderr, "Perhaps the process or thread has terminated?\n"); - exit(EXIT_FAILURE); - } else { - return list; - } - } - fprintf(f, "erase\n"); - fclose(f); - } - - f = fopen(GLOBAL_STATS_FILE, "r"); - if (!f) { - if (fatal) { - fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno)); - fprintf(stderr, "Perhaps the process or thread has terminated?\n"); - exit(EXIT_FAILURE); - } else { - return list; - } - } - - e = read_latency_file(f, list); - - fclose(f); - - return e; -} - -static struct latency_entry *alloc_latency_entry(void) { - struct latency_entry *e; - - if (free_entries) { - e = free_entries; - free_entries = free_entries->next; - } else { - e = calloc(1, sizeof(struct latency_entry)); - if (!e) { - fprintf(stderr, "Could not allocate latency entry: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - } - - return e; -} - -static void free_latency_entry(struct latency_entry *e) { - e->next = free_entries; - free_entries = e; -} - -static struct latency_entry *find_latency_entry(struct latency_entry *head, char *reason) { - struct latency_entry *e; - - e = head; - - while (e) { - if (!strcmp(e->reason, reason)) - return e; - e = e->next; - } - - return NULL; -} - -static void set_latencytop(int on) { - FILE *f; - - f = fopen(SYSCTL_FILE, "w"); - if (!f) { - fprintf(stderr, "Could not open %s: %s\n", SYSCTL_FILE, strerror(errno)); - exit(EXIT_FAILURE); - } - - fprintf(f, "%d\n", on); - - fclose(f); -} - -static void erase_latency_file(FILE *f) { - fprintf(f, "erase\n"); -} - -static struct latency_entry *read_latency_file(FILE *f, struct latency_entry *list) { - struct latency_entry *e, *head; - char line[MAX_LINE]; - unsigned long count, max, total; - char reason[MAX_LINE]; - - head = list; - - if (!fgets(line, MAX_LINE, f)) { - fprintf(stderr, "Could not read latency file version: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - - if (strcmp(line, EXPECTED_VERSION) != 0) { - fprintf(stderr, "Expected version: %s\n", EXPECTED_VERSION); - fprintf(stderr, "But got version: %s", line); - exit(EXIT_FAILURE); - } - - while (fgets(line, MAX_LINE, f)) { - sscanf(line, "%ld %ld %ld %s", &count, &total, &max, reason); - if (max > 0 || total > 0) { - e = find_latency_entry(head, reason); - if (e) { - e->count += count; - if (max > e->max) - e->max = max; - e->total += total; - } else { - e = alloc_latency_entry(); - e->count = count; - e->max = max; - e->total = total; - strcpy(e->reason, reason); - e->next = head; - head = e; - } - } - } - - return head; -} - -static void print_latency_entries(struct latency_entry *head) { - struct latency_entry *e, **array; - unsigned long average; - int i, count; - - e = head; - count = 0; - while (e) { - count++; - e = e->next; - } - - e = head; - array = calloc(count, sizeof(struct latency_entry *)); - if (!array) { - fprintf(stderr, "Error allocating array: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - for (i = 0; i < count; i++) { - array[i] = e; - e = e->next; - } - - qsort(array, count, sizeof(struct latency_entry *), &lat_cmp); - - printf("%10s %10s %7s %s\n", "Maximum", "Average", "Count", "Reason"); - for (i = 0; i < count; i++) { - e = array[i]; - average = e->total / e->count; - printf("%4lu.%02lu ms %4lu.%02lu ms %7ld %s\n", - e->max / 1000, (e->max % 1000) / 10, - average / 1000, (average % 1000) / 10, - e->count, - e->reason); - } - - free(array); -} - -static void signal_handler(int sig) { - exit(EXIT_SUCCESS); -} - -static void disable_latencytop(void) { - set_latencytop(0); -} - -static void clear_screen(void) { - printf("\n\n"); -} - -static void usage(const char *cmd) { - fprintf(stderr, "Usage: %s [ -d delay ] [ -n iterations ] [ -p pid [ -t tid ] ] [ -h ]\n" - " -d delay Time to sleep between updates.\n" - " -n iterations Number of updates to show (0 = infinite).\n" - " -p pid Process to monitor (default is all).\n" - " -t tid Thread (within specified process) to monitor (default is all).\n" - " -h Display this help screen.\n", - cmd); -} - -static int numcmp(const long long a, const long long b) { - if (a < b) return -1; - if (a > b) return 1; - return 0; -} - -static int lat_cmp(const void *a, const void *b) { - const struct latency_entry *pa, *pb; - - pa = (*((struct latency_entry **)a)); - pb = (*((struct latency_entry **)b)); - - return numcmp(pb->max, pa->max); -} |