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Merge change 24841 into eclair

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* changes:
  process: Switch to common cutils sched_policy api
This commit is contained in:
Android (Google) Code Review
2009-09-14 18:31:39 -04:00
parent 55bfddad19 242d65bf9f
commit aa931bcb0a
2 changed files with 17 additions and 65 deletions
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77
core/jni/android_util_Process.cpp
View File

@@ -32,6 +32,7 @@
#include <sys/errno.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <cutils/sched_policy.h>
#include <dirent.h>
#include <fcntl.h>
#include <grp.h>
@@ -186,58 +187,6 @@ jint android_os_Process_getGidForName(JNIEnv* env, jobject clazz, jstring name)
return -1;
}
static int add_pid_to_cgroup(int pid, const char *grp_name)
{
int fd;
char path[255];
char text[64];
sprintf(path, "/dev/cpuctl/%s/tasks", grp_name);
if ((fd = open(path, O_WRONLY)) < 0)
return -1;
sprintf(text, "%d", pid);
if (write(fd, text, strlen(text)) < 0) {
close(fd);
return -1;
}
close(fd);
return 0;
}
void setSchedPolicy(JNIEnv* env, jobject clazz, int pid, SchedPolicy policy)
{
static int __sys_supports_schedgroups = -1;
if (__sys_supports_schedgroups < 0) {
if (!access("/dev/cpuctl/tasks", F_OK)) {
__sys_supports_schedgroups = 1;
} else {
__sys_supports_schedgroups = 0;
}
}
if (__sys_supports_schedgroups) {
const char *grp = NULL;
if (policy == SP_BACKGROUND) {
grp = "bg_non_interactive";
}
if (add_pid_to_cgroup(pid, grp)) {
if (errno != ESRCH && errno != ENOENT)
signalExceptionForGroupError(env, clazz, errno);
}
} else {
struct sched_param param;
param.sched_priority = 0;
sched_setscheduler(pid, (policy == SP_BACKGROUND) ? 5 : 0, &param);
}
}
void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
{
if (grp > ANDROID_TGROUP_MAX || grp < 0) {
@@ -245,9 +194,10 @@ void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int pid, jint
return;
}
setSchedPolicy(env, clazz, pid,
(grp == ANDROID_TGROUP_BG_NONINTERACT) ?
SP_BACKGROUND : SP_FOREGROUND);
if (set_sched_policy(pid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ?
SP_BACKGROUND : SP_FOREGROUND)) {
signalExceptionForGroupError(env, clazz, errno);
}
}
void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
@@ -291,9 +241,10 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
continue;
}
setSchedPolicy(env, clazz, t_pid,
(grp == ANDROID_TGROUP_BG_NONINTERACT) ?
SP_BACKGROUND : SP_FOREGROUND);
if (set_sched_policy(t_pid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ?
SP_BACKGROUND : SP_FOREGROUND)) {
signalExceptionForGroupError(env, clazz, errno);
}
}
closedir(d);
}
@@ -301,10 +252,16 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz,
jint pid, jint pri)
{
int rc = 0;
if (pri >= ANDROID_PRIORITY_BACKGROUND) {
setSchedPolicy(env, clazz, pid, SP_BACKGROUND);
rc = set_sched_policy(pid, SP_BACKGROUND);
} else if (getpriority(PRIO_PROCESS, pid) >= ANDROID_PRIORITY_BACKGROUND) {
setSchedPolicy(env, clazz, pid, SP_FOREGROUND);
rc = set_sched_policy(pid, SP_FOREGROUND);
}
if (rc) {
signalExceptionForGroupError(env, clazz, errno);
}
if (setpriority(PRIO_PROCESS, pid, pri) < 0) {

5
include/utils/threads.h
View File

@@ -90,11 +90,6 @@ enum {
ANDROID_TGROUP_MAX = ANDROID_TGROUP_FG_BOOST,
};
typedef enum {
SP_BACKGROUND = 0,
SP_FOREGROUND = 1,
} SchedPolicy;
// Create and run a new thread.
extern int androidCreateThread(android_thread_func_t, void *);