1#include <stdio.h> 2#include "api/fs/fs.h" 3#include "util/group.h" 4 5/* 6 * Check whether we can use a group for top down. 7 * Without a group may get bad results due to multiplexing. 8 */ 9bool arch_topdown_check_group(bool *warn) 10{ 11 int n; 12 13 if (sysctl__read_int("kernel/nmi_watchdog", &n) < 0) 14 return false; 15 if (n > 0) { 16 *warn = true; 17 return false; 18 } 19 return true; 20} 21 22void arch_topdown_group_warn(void) 23{ 24 fprintf(stderr, 25 "nmi_watchdog enabled with topdown. May give wrong results.\n" 26 "Disable with echo 0 > /proc/sys/kernel/nmi_watchdog\n"); 27} 28