Commit 5f676ce9 authored by Andrey Filippov's avatar Andrey Filippov
Browse files

CLAUDE: McpServer: hold balanced power profile while MCP is running 



Spawns attic/elphel-agent-tools/bin/cpu_profile_hold.py on startup,
which calls power-profiles-daemon HoldProfile('balanced') via DBus.
Released automatically via SIGTERM on JVM shutdown.

Design: KDE AC default is power-saver; this hold raises the profile to
balanced (hardware-driven boost under load) while ImageJ is running,
then releases it so the machine drops back to power-saver on exit.

Co-authored-by: default avatarClaude <claude@elphel.com>
parent b7cd20d7

src/main/java/com/elphel/imagej/mcp/McpServer.java

+23 −0
Original line number Original line Diff line number Diff line
@@ -45,6 +45,7 @@ import com.sun.net.httpserver.HttpServer; 




public class McpServer {

public class McpServer {

    private static McpServer INSTANCE;

    private static McpServer INSTANCE;

    private static Process powerHoldProcess;





    private final Eyesis_Correction owner;

    private final Eyesis_Correction owner;

    private final int port;

    private final int port;
@@ -57,6 +58,7 @@ public class McpServer { 
        McpFsAccess.ensureConfigured();

        McpFsAccess.ensureConfigured();

        McpServer instance = new McpServer(owner, port);

        McpServer instance = new McpServer(owner, port);

        instance.start();

        instance.start();

        startPowerHold();

        if (hasReverseSshTunnel(port)) {

        if (hasReverseSshTunnel(port)) {

            System.out.println("MCP: reverse SSH tunnel detected for port " + port);

            System.out.println("MCP: reverse SSH tunnel detected for port " + port);

        } else {

        } else {
@@ -66,6 +68,27 @@ public class McpServer { 
        return instance;

        return instance;

    }

    }





    private static void startPowerHold() {

        java.io.File script = new java.io.File(

                System.getProperty("user.dir"),

                "attic/elphel-agent-tools/bin/cpu_profile_hold.py");

        if (!script.exists()) return;

        try {

            powerHoldProcess = new ProcessBuilder("python3", script.getAbsolutePath())

                    .redirectErrorStream(true)

                    .start();

            Runtime.getRuntime().addShutdownHook(new Thread(() -> {

                if (powerHoldProcess != null && powerHoldProcess.isAlive()) {

                    powerHoldProcess.destroy();

                }

            }, "cpu-profile-hold-release"));

            System.out.println("MCP: power profile hold started (balanced, pid="

                    + powerHoldProcess.pid() + ")");

        } catch (Exception e) {

            System.out.println("MCP: could not start power profile hold: " + e.getMessage());

        }

    }



    private static boolean hasReverseSshTunnel(int port) {

    private static boolean hasReverseSshTunnel(int port) {

        String needle = "127.0.0.1:" + port + ":127.0.0.1:" + port;

        String needle = "127.0.0.1:" + port + ":127.0.0.1:" + port;

        final boolean[] found = new boolean[] { false };

        final boolean[] found = new boolean[] { false };