【JAVA之获取CPU/内存信息】

代码

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.CentralProcessor.TickType;
import oshi.hardware.GlobalMemory;
import oshi.hardware.HardwareAbstractionLayer;
import oshi.util.FormatUtil;
import oshi.util.Util;

import java.util.Arrays;


/**
 * os information test
 */
public class OshiTest {

    private static Logger logger = LoggerFactory.getLogger(OshiTest.class);


    @Test
public void test() {

        SystemInfo si = new SystemInfo();

        HardwareAbstractionLayer hal = si.getHardware();

        logger.info("Checking Memory...");
        printMemory(hal.getMemory());


        logger.info("Checking CPU...");
        printCpu(hal.getProcessor());

    }



    private static void printMemory(GlobalMemory memory) {

        logger.info("memory avail:{} MB" , memory.getAvailable() / 1024 / 1024 );//memory avail:6863 MB
logger.info("memory total:{} MB" , memory.getTotal() / 1024 / 1024 );//memory total:16384 MB
}


    private static void printCpu(CentralProcessor processor) {
        logger.info(String.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad() * 100));//CPU load: 24.9% (OS MXBean)
logger.info("CPU load averages : {}", processor.getSystemLoadAverage());//CPU load averages : 1.5234375


logger.info("Uptime: " + FormatUtil.formatElapsedSecs(processor.getSystemUptime()));
        logger.info("Context Switches/Interrupts: " + processor.getContextSwitches() + " / " + processor.getInterrupts());


        long[] prevTicks = processor.getSystemCpuLoadTicks();
        logger.info("CPU, IOWait, and IRQ ticks @ 0 sec:" + Arrays.toString(prevTicks));
         //Wait a second...
Util.sleep(1000);
        long[] ticks = processor.getSystemCpuLoadTicks();
        logger.info("CPU, IOWait, and IRQ ticks @ 1 sec:" + Arrays.toString(ticks));
        long user = ticks[TickType.USER.getIndex()] - prevTicks[TickType.USER.getIndex()];
        long nice = ticks[TickType.NICE.getIndex()] - prevTicks[TickType.NICE.getIndex()];
        long sys = ticks[TickType.SYSTEM.getIndex()] - prevTicks[TickType.SYSTEM.getIndex()];
        long idle = ticks[TickType.IDLE.getIndex()] - prevTicks[TickType.IDLE.getIndex()];
        long iowait = ticks[TickType.IOWAIT.getIndex()] - prevTicks[TickType.IOWAIT.getIndex()];
        long irq = ticks[TickType.IRQ.getIndex()] - prevTicks[TickType.IRQ.getIndex()];
        long softirq = ticks[TickType.SOFTIRQ.getIndex()] - prevTicks[TickType.SOFTIRQ.getIndex()];
        long steal = ticks[TickType.STEAL.getIndex()] - prevTicks[TickType.STEAL.getIndex()];
        long totalCpu = user + nice + sys + idle + iowait + irq + softirq + steal;

        logger.info(String.format(
                "User: %.1f%% Nice: %.1f%% System: %.1f%% Idle: %.1f%% IOwait: %.1f%% IRQ: %.1f%% SoftIRQ: %.1f%% Steal: %.1f%%%n",
                100d * user / totalCpu, 100d * nice / totalCpu, 100d * sys / totalCpu, 100d * idle / totalCpu,
                100d * iowait / totalCpu, 100d * irq / totalCpu, 100d * softirq / totalCpu, 100d * steal / totalCpu));
        logger.info(String.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks() * 100));



        double[] loadAverage = processor.getSystemLoadAverage(3);
        logger.info("CPU load averages:" + (loadAverage[0] < 0 ? " N/A" : String.format(" %.2f", loadAverage[0]))
                + (loadAverage[1] < 0 ? " N/A" : String.format(" %.2f", loadAverage[1]))
                + (loadAverage[2] < 0 ? " N/A" : String.format(" %.2f", loadAverage[2])));
        // per core CPU
StringBuilder procCpu = new StringBuilder("CPU load per processor:");
        double[] load = processor.getProcessorCpuLoadBetweenTicks();
        for (double avg : load) {
            procCpu.append(String.format(" %.1f%%", avg * 100));
        }
        logger.info(procCpu.toString());
    }
}

 

结果

16:03:08.573 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - Checking Memory...

16:03:10.592 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - memory avail:155 MB

16:03:10.594 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - memory total:4095 MB

16:03:10.594 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - Checking CPU...

16:03:10.772 [main] DEBUG oshi.hardware.common.AbstractCentralProcessor - Oracle MXBean detected.

16:03:12.319 [main] DEBUG oshi.hardware.platform.windows.WindowsCentralProcessor - Initialized Processor

16:03:12.322 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU load: 41.0% (OS MXBean)

 

16:03:12.322 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU load averages : -1.0

16:03:12.326 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - Uptime: 1 days, 20:39:54

16:03:12.328 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - Context Switches/Interrupts: 1714488866 / 570600239

16:03:12.330 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU, IOWait, and IRQ ticks @ 0 sec:[37287359, 0, 19608289, 234918099, 0, 520263, 600050, 0]

16:03:13.332 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU, IOWait, and IRQ ticks @ 1 sec:[37287421, 0, 19608313, 234920002, 0, 520263, 600057, 0]

16:03:13.333 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - User: 3.1% Nice: 0.0% System: 1.2% Idle: 95.3% IOwait: 0.0% IRQ: 0.0% SoftIRQ: 0.4% Steal: 0.0%

 

16:03:13.333 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU load: 19.8% (counting ticks)

 

16:03:13.333 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU load averages: N/A N/A N/A

16:03:13.337 [main] INFO org.apache.dolphinscheduler.common.os.OshiTest - CPU load per processor: 21.3% 18.3%