Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge change 3725 into donut

Browse Source 
* changes:
  process: Clean up cgroup management
This commit is contained in:
Android (Google) Code Review
2009-06-10 11:07:52 -07:00
parent 9e09e0f439 0cb53209c3
commit 0e7cf6366b
1 changed files with 27 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
core/jni/android_util_Process.cpp
View File

@@ -50,7 +50,7 @@ pid_t gettid() { return syscall(__NR_gettid);}
#undef __KERNEL__
#endif
#define ENABLE_CGROUP_ERR_LOGGING 0
#define ENABLE_CGROUP_DEBUG 0
/*
* List of cgroup names which map to ANDROID_TGROUP_ values in Thread.h
@@ -198,35 +198,39 @@ jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name)
static int add_pid_to_cgroup(int pid, int grp)
{
FILE *fp;
int fd;
char path[255];
int rc;
char text[64];
sprintf(path, "/dev/cpuctl/%s/tasks", (cgroup_names[grp] ? cgroup_names[grp] : ""));
sprintf(path, "/dev/cpuctl/%s/tasks",
(cgroup_names[grp] ? cgroup_names[grp] : ""));
if (!(fp = fopen(path, "w"))) {
#if ENABLE_CGROUP_ERR_LOGGING
LOGW("Unable to open %s (%s)\n", path, strerror(errno));
#endif
return -errno;
if ((fd = open(path, O_WRONLY)) < 0) {
LOGE("Error opening '%s' (%s)", path, strerror(errno));
return -1;
}
rc = fprintf(fp, "%d", pid);
fclose(fp);
if (rc < 0) {
#if ENABLE_CGROUP_ERR_LOGGING
LOGW("Unable to move pid %d to cgroup %s (%s)\n", pid,
(cgroup_names[grp] ? cgroup_names[grp] : "<default>"),
strerror(errno));
#endif
sprintf(text, "%d", pid);
if (write(fd, text, strlen(text)) < 0) {
LOGE("Error writing to '%s' (%s)", path, strerror(errno));
close(fd);
return -1;
}
return (rc < 0) ? errno : 0;
close(fd);
#if ENABLE_CGROUP_DEBUG
LOGD("Pid %d sucessfully added to '%s'", pid, path);
#endif
return 0;
}
void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
{
#if ENABLE_CGROUP_DEBUG
LOGD("android_os_Process_setThreadGroup(%d, %d)", pid, grp);
#endif
if (grp > ANDROID_TGROUP_MAX || grp < 0) {
signalExceptionForGroupError(env, clazz, EINVAL);
return;
@@ -243,6 +247,10 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
char proc_path[255];
struct dirent *de;
#if ENABLE_CGROUP_DEBUG
LOGD("android_os_Process_setProcessGroup(%d, %d)", pid, grp);
#endif
if (grp > ANDROID_TGROUP_MAX || grp < 0) {
signalExceptionForGroupError(env, clazz, EINVAL);
return;