How to raise mouse frequency(or report rate) with nrf51822

[gootoomoon]

It's only 90hz now with my nrf6310 and hid_mouse_app

[gootoomoon]

win7 seems OK . When test my ble mouse (nrf51822, OS: win8.1), the mouse Report Rate can only up to about 110 HZ, ( when browser opened) even if I set the period to 1ms (it should be about 1000 HZ). And if set the sleep time to 8ms (want to make mouse report rate 125HZ like USB mouse), the test result is olny 70HZ.

int main(void)
{
    timers_init();
    gpiote_init();
    buttons_init();
    sensor_init();
    bond_manager_init();
    ble_stack_init();
    scheduler_init();
    gap_params_init();
    advertising_init(BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE);
    services_init();
    sensor_sim_init();
    conn_params_init();
    sec_params_init();
    radio_notification_init();
    
    timers_start();
    advertising_start();
    
    for (;;)
    {
		wheel_check();
		if(button_pressed == true)
			button_check();
		
		mouse_sensor_send();
                app_sched_execute();
//              power_manage();
		nrf_delay_ms(1);
    }
}

but USB mouse and other 2.4G mouse can up to 125 HZ (with browser opened)

And I test it with logic analyzer when move the mouse

I found that every 10ms it cost 5ms break:

And it is every diffcult between BLE mouse and USB mouse at win8.1 , test by MouseMovementRecorder

BLE mouse :

USB mouse:

Get the test soft in the attachment

I want to know

1. Why it wil cost 5ms every 10ms, when I set sleep 1ms in the loop.How can I reduce it?
2. Why BLE mouse Report Rate is unstable. How can I make stable like USB mouse(125HZ or higher) ?

Thank you all !