我想问是否有一些简单的方法来确定java
中每个线程的cpu 使用率
。谢谢
最佳答案
我相信 JConsole ( archived link ) 确实通过插件提供了这种信息
它使用 ThreadMXBean getThreadCpuTime() 函数。
类似的东西:
long upTime = runtimeProxy.getUptime();
List<Long> threadCpuTime = new ArrayList<Long>();
for (int i = 0; i < threadIds.size(); i++) {
long threadId = threadIds.get(i);
if (threadId != -1) {
threadCpuTime.add(threadProxy.getThreadCpuTime(threadId));
} else {
threadCpuTime.add(0L);
}
}
int nCPUs = osProxy.getAvailableProcessors();
List<Float> cpuUsageList = new ArrayList<Float>();
if (prevUpTime > 0L && upTime > prevUpTime) {
// elapsedTime is in ms
long elapsedTime = upTime - prevUpTime;
for (int i = 0; i < threadIds.size(); i++) {
// elapsedCpu is in ns
long elapsedCpu = threadCpuTime.get(i) - prevThreadCpuTime.get(i);
// cpuUsage could go higher than 100% because elapsedTime
// and elapsedCpu are not fetched simultaneously. Limit to
// 99% to avoid Chart showing a scale from 0% to 200%.
float cpuUsage = Math.min(99F, elapsedCpu / (elapsedTime * 1000000F * nCPUs));
cpuUsageList.add(cpuUsage);
}
}
关于java - `监控java中每个线程的cpu使用情况?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/755899/