C++ ACTIVE_TASK::preempt方法代码示例

// suspend all currently running tasks
// called only from CLIENT_STATE::suspend_tasks(),
// e.g. because on batteries, time of day, benchmarking, CPU throttle, etc.
//
void ACTIVE_TASK_SET::suspend_all(int reason) {
    for (unsigned int i=0; i<active_tasks.size(); i++) {
        ACTIVE_TASK* atp = active_tasks[i];
        if (atp->task_state() != PROCESS_EXECUTING) continue;
        switch (reason) {
        case SUSPEND_REASON_CPU_THROTTLE:
            // if we're doing CPU throttling, don't bother suspending apps
            // that don't use a full CPU
            //
            if (atp->result->dont_throttle()) continue;
            if (atp->app_version->avg_ncpus < 1) continue;
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_BENCHMARKS:
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_CPU_USAGE:
            // If we're suspending because of non-BOINC CPU load,
            // don't remove from memory.
            // Some systems do a security check when apps are launched,
            // which uses a lot of CPU.
            // Avoid going into a preemption loop.
            //
            if (atp->result->non_cpu_intensive()) break;
            atp->preempt(REMOVE_NEVER);
            break;
        default:
            atp->preempt(REMOVE_MAYBE_USER);
        }
    }
}

// suspend all currently running tasks
// called only from CLIENT_STATE::suspend_tasks(),
// e.g. because on batteries, time of day, benchmarking, CPU throttle, etc.
//
void ACTIVE_TASK_SET::suspend_all(int reason) {
    for (unsigned int i=0; i<active_tasks.size(); i++) {
        ACTIVE_TASK* atp = active_tasks[i];
        if (atp->task_state() != PROCESS_EXECUTING) continue;
        switch (reason) {
        case SUSPEND_REASON_CPU_THROTTLE:
            // if we're doing CPU throttling, don't bother suspending apps
            // that don't use a full CPU
            //
            if (atp->result->project->non_cpu_intensive) continue;
            if (atp->app_version->avg_ncpus < 1) continue;
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_BENCHMARKS:
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_CPU_USAGE:
            if (atp->result->project->non_cpu_intensive) break;
        // fall through
        default:
            atp->preempt(REMOVE_MAYBE_USER);
        }
    }
}

// The following runs "test_app" and sends it various messages.
// Used for testing the runtime system.
//
void run_test_app() {
    WORKUNIT wu;
    PROJECT project;
    APP app;
    APP_VERSION av;
    ACTIVE_TASK at;
    ACTIVE_TASK_SET ats;
    RESULT result;
    int retval;

    char buf[256];
    getcwd(buf, sizeof(buf));   // so we can see where we're running

    gstate.run_test_app = true;

    wu.project = &project;
    wu.app = &app;
    wu.command_line = string("--critical_section");

    strcpy(app.name, "test app");
    av.init();
    av.avg_ncpus = 1;

    strcpy(result.name, "test result");
    result.avp = &av;
    result.wup = &wu;
    result.project = &project;
    result.app = &app;

    at.result = &result;
    at.wup = &wu;
    at.app_version = &av;
    at.max_elapsed_time = 1e6;
    at.max_disk_usage = 1e14;
    at.max_mem_usage = 1e14;
    strcpy(at.slot_dir, ".");

#if 1
    // test file copy
    //
    ASYNC_COPY* ac = new ASYNC_COPY;
    FILE_INFO fi;
    retval = ac->init(&at, &fi, "big_file", "./big_file_copy");
    if (retval) {
        exit(1);
    }
    while (1) {
        do_async_file_ops();
        if (at.async_copy == NULL) {
            break;
        }
    }
    fprintf(stderr, "done\n");
    exit(0);
#endif
    ats.active_tasks.push_back(&at);

    unlink("boinc_finish_called");
    unlink("boinc_lockfile");
    unlink("boinc_temporary_exit");
    unlink("stderr.txt");
    retval = at.start(true);
    if (retval) {
        fprintf(stderr, "start() failed: %s\n", boincerror(retval));
    }
    while (1) {
        gstate.now = dtime();
        at.preempt(REMOVE_NEVER);
        ats.poll();
        boinc_sleep(.1);
        at.unsuspend();
        ats.poll();
        boinc_sleep(.2);
        //at.request_reread_prefs();
    }
}

// suspend all currently running tasks
// e.g. because on batteries, time of day, benchmarking, CPU throttle, etc.
//
void ACTIVE_TASK_SET::suspend_all(int reason) {
    for (unsigned int i=0; i<active_tasks.size(); i++) {
        ACTIVE_TASK* atp = active_tasks[i];

        // don't suspend if process doesn't exist,
        // or if quit/abort is pending.
        // If process is currently suspended, proceed;
        // the new suspension may require it to be removed from memory.
        // E.g. a GPU job may currently be suspended due to CPU throttling,
        // and therefore left in memory,
        // but this suspension (say, a user request)
        // might require it to be removed from memory.
        //
        switch (atp->task_state()) {
        case PROCESS_EXECUTING:
        case PROCESS_SUSPENDED:
            break;
        default:
            continue;
        }

        // handle CPU throttling separately
        //
        if (reason == SUSPEND_REASON_CPU_THROTTLE) {
            if (atp->result->dont_throttle()) continue;
            atp->preempt(REMOVE_NEVER, reason);
            continue;
        }

#ifdef ANDROID
        // On Android, remove apps from memory if on batteries
        // no matter what the reason for suspension.
        // The message polling in the BOINC runtime system
        // imposes an overhead which drains the battery
        //
        if (gstate.host_info.host_is_running_on_batteries()) {
            atp->preempt(REMOVE_ALWAYS);
            continue;
        }
#endif

        switch (reason) {
        case SUSPEND_REASON_BENCHMARKS:
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_CPU_USAGE:
            // If we're suspending because of non-BOINC CPU load,
            // don't remove from memory.
            // Some systems do a security check when apps are launched,
            // which uses a lot of CPU.
            // Avoid going into a preemption loop.
            //
            if (atp->result->non_cpu_intensive()) break;
            atp->preempt(REMOVE_NEVER);
            break;
        case SUSPEND_REASON_BATTERY_OVERHEATED:
        case SUSPEND_REASON_BATTERY_CHARGING:
            // these conditions can oscillate, so leave apps in mem
            //
            atp->preempt(REMOVE_NEVER);
            break;
        default:
            atp->preempt(REMOVE_MAYBE_USER);
            break;
        }
    }
}