diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vmon.c | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -17,11 +17,13 @@ */ #include <assert.h> +#include <errno.h> #include <limits.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/mman.h> #include <sys/prctl.h> #include <time.h> #include <sys/stat.h> @@ -46,6 +48,7 @@ typedef struct vmon_t { int done; int linger; int dump_procs; + int mem_locked; time_t start_time; int snapshots_interval; int snapshot; @@ -201,6 +204,7 @@ static void print_help(void) " -w --wip-name Name to use for work-in-progress snapshot filename\n" " -v --version Print version\n" " -D --dump-procs Dump libvmon internal processes table (debugging aid)\n" + " -L --mem-locked Lock in memory using mlockall(MCL_CURRENT|MCL_FUTURE)\n" " -W --width Chart width\n" " -z --hertz Sample rate in hertz\n" "-------------------------------------------------------------------------------" @@ -491,6 +495,9 @@ static int vmon_handle_argv(vmon_t *vmon, int argc, const char * const *argv) } else if (is_flag(*argv, "-D", "--dump-procs")) { vmon->dump_procs = 1; last = argv; + } else if (is_flag(*argv, "-L", "--mem-locked")) { + vmon->mem_locked = 1; + last = argv; } else if ((*argv)[0] == '-') { VWM_ERROR("Unrecognized argument: \"%s\", try --help\n", argv[0]); exit(EXIT_FAILURE); @@ -692,6 +699,13 @@ static vmon_t * vmon_startup(int argc, const char * const *argv) goto _err_win; } + if (vmon->mem_locked) { + if (mlockall(MCL_CURRENT|MCL_FUTURE) < 0) { + VWM_ERROR("unable to lock in memory: %s", strerror(errno)); + goto _err_win; + } + } + return vmon; _err_win: |