http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/clplumbing/cpulimits.h

/* $Id: cpulimits.h,v 1.4 2005/07/28 08:20:05 sunjd Exp $ */ /* * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* * Functions to put limits on CPU consumption. * This allows us to better catch runaway realtime processes that * might otherwise hang the whole system. * * The process is basically this: * - Set the CPU percentage limit with cl_cpu_limit_setpercent() * according to what you expect the CPU percentage to top out at * measured over an interval at >= 10 seconds * - Call cl_cpu_limit_ms_interval() to figure out how often to update * the CPU limit (it returns milliseconds) * - At least as often as indicated above, call cl_cpu_limit_update() * to update our current CPU limit. * * These limits are approximate, so be a little conservative. * If you've gone into an infinite loop, it'll likely get caught ;-) * * Note that exceeding the soft CPU limits we set here will cause a * SIGXCPU signal to be sent. * * The default action for this signal is to cause a core dump. * This is a good choice ;-) * * As of this writing, this code will never set the soft CPU limit less * than two seconds, or greater than 10 seconds. * * It will currrently return a limit update interval between 10000 and * 400000 milliseconds. * */ /* * Set expected CPU percentage upper bound */ int cl_cpu_limit_setpercent(int ipercent); /* * Update the current CPU limit */ int cl_cpu_limit_update(void); /* * How often should we call cl_cpu_limit_update()? * * Note: return result is in milliseconds */ int cl_cpu_limit_ms_interval(void); /* Disable further CPU limits... */ int cl_cpu_limit_disable(void);