Как смотреть fps Линукс сервера

#include <amxmodx>
#include <fakemeta>

#define PLUGIN "FPS Optimizer"
#define VERSION "1.0"
#define AUTHOR "Sho0ter"

#define ACCESS_LEVEL ADMIN_RCON

#define MAX_FPS 1050
#define MIN_FPS 1050
#define OPT_FPS 1050
#define FLUX_FPS 5

new Float:gametime
new Float:framesper

new show[33]
new hud
new syst
new currentrate
new fps
new maxplayers


public plugin_init() 
{
	register_plugin(PLUGIN, VERSION, AUTHOR)
	register_clcmd("say /showfps", "cmd_show")
	register_forward(FM_StartFrame, "start_frame")
	syst = get_cvar_pointer("sys_ticrate")
	currentrate = OPT_FPS
	hud = CreateHudSyncObj()
	maxplayers = get_maxplayers()
	return PLUGIN_CONTINUE
}

public cmd_show(id)
{
	if(!(get_user_flags(id) & ACCESS_LEVEL))
	{
		return PLUGIN_HANDLED
	}
	if(!show[id])
	{
		show[id] = 1
	}
	else
	{
		show[id] = 0
	}
	return PLUGIN_HANDLED
}

public client_disconnect(id)
{
	show[id] = 0
	return PLUGIN_CONTINUE
}

public start_frame()
{
	gametime = get_gametime()
	if(framesper >= gametime)
	{
		fps += 1
	}
	else
	{
		framesper += 1.0
		for(new id = 1; id <= maxplayers; id++)
		{
			if(!is_user_connected(id) || !show[id])
			{
				continue
			}
			switch(fps)
			{
				case 500..1000:
				{
					set_hudmessage(0, 255, 0, 0.05, -1.0, 0, 1.0, 1.1, 0.1, 0.1, -1);
				}
				case 250..499:
				{
					set_hudmessage(255, 255, 0, 0.05, -1.0, 0, 1.0, 1.1, 0.1, 0.1, -1);
				}
				case 100..249:
				{
					set_hudmessage(255, 0, 0, 0.05, -1.0, 0, 1.0, 1.1, 0.1, 0.1, -1);
				}
				default:
				{
					set_hudmessage(255, 0, 0, 0.05, -1.0, 1, 1.0, 1.1, 0.1, 0.1, -1);
				}
			}
			ShowSyncHudMsg(id, hud, "Server FPS: %d frames/sec.^nCurrent ticrate: %d", fps, currentrate)
		}
		if(fps < OPT_FPS && currentrate < MAX_FPS)
		{
			currentrate += FLUX_FPS
			set_pcvar_num(syst, currentrate)
		}
		else if(fps >= OPT_FPS && currentrate > MIN_FPS)
		{
			currentrate -= FLUX_FPS
			set_pcvar_num(syst, currentrate)
		}
		fps = 1
    }
}