From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <47CDB710.6030103@domain.hid> Date: Tue, 04 Mar 2008 21:54:40 +0100 From: Anders Blomdell MIME-Version: 1.0 References: <47CDA626.4010604@domain.hid> <18381.44749.419005.112838@domain.hid> In-Reply-To: <18381.44749.419005.112838@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] How should rt_task_delete(NULL) be used? List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai-help Gilles Chanteperdrix wrote: > Anders Blomdell wrote: > > Why does the following program grow it's VMSIZE? This is the output I get: > > > > [child = 0, 0] VmSize: 1912 kB > > [child = 1, 1] VmSize: 1980 kB > > [child = 2, 2] VmSize: 2048 kB > > [child = 3, 3] VmSize: 2116 kB > > [child = 4, 4] VmSize: 2184 kB > > [child = 5, 5] VmSize: 2252 kB > > [child = 6, 6] VmSize: 2320 kB > > [child = 7, 7] VmSize: 2388 kB > > [child = 8, 8] VmSize: 2456 kB > > [child = 9, 9] VmSize: 2524 kB > > [child = 10, 10] VmSize: 2592 kB > > [child = 11, 11] VmSize: 2660 kB > > [child = 12, 12] VmSize: 2728 kB > > [child = 13, 13] VmSize: 2796 kB > > [child = 14, 14] VmSize: 2864 kB > > [child = 15, 15] VmSize: 2932 kB > > [child = 16, 16] VmSize: 3000 kB > > [child = 17, 17] VmSize: 3068 kB > > [child = 18, 18] VmSize: 3136 kB > > [child = 19, 19] VmSize: 3204 kB > > Could you dump /proc/self/maps at the beginning and the end, to see > where the reserved memory comes from ? > Sligtly modified program (being sloppy seems to be the better choice, just returning without trying to cleanup self is cheaper, weird)... #include #include #include #include #include #include #include #include static void child(void *arg) { int n = (int)arg; printf("[child = %2d", n); fflush(stdout); if (n < 10) { rt_task_delete(NULL); } } static void dump(char *path) { char buf[4096]; int N, fd; fd = open(path, O_RDONLY); while ((N = read(fd, buf, 4096)) > 0) { printf("%1.*s", N, buf); fflush(stdout); } close(fd); } int main(int argc, char *argv[]) { int i; RT_TASK task_main; RT_TASK task; mlockall(MCL_CURRENT|MCL_FUTURE); rt_task_shadow(&task_main, "main", 1, T_FPU); dump("/proc/self/maps"); for (i = 0 ; i < 20 ; i++) { if (rt_task_create(&task, NULL, 0, 1, 0)) { fprintf(stderr, "Failed to create task\n"); exit(1); } if (rt_task_start(&task, &child, (void*)i)) { fprintf(stderr, "Failed to start task\n"); exit(1); } rt_task_sleep(1000000000L); { int fd; char *p1 = NULL, *p2 = NULL; char buf[4000]; fd = open("/proc/self/status", O_RDONLY); if (read(fd, buf, 4000) > 0) { p1 = strstr(buf, "VmSize"); if (p1) { p2 = strstr(p1, "\n"); } if (p1 && p2) { printf(", %2d] %1.*s\n", i, p2 - p1, p1); } fflush(stdout); } close(fd); } } dump("/proc/self/maps"); exit(0); } 0062e000-00649000 r-xp 00000000 08:05 950516 /lib/ld-2.6.so 00649000-0064a000 r--p 0001a000 08:05 950516 /lib/ld-2.6.so 0064a000-0064b000 rw-p 0001b000 08:05 950516 /lib/ld-2.6.so 0064d000-0079b000 r-xp 00000000 08:05 950517 /lib/libc-2.6.so 0079b000-0079d000 r--p 0014e000 08:05 950517 /lib/libc-2.6.so 0079d000-0079e000 rw-p 00150000 08:05 950517 /lib/libc-2.6.so 0079e000-007a1000 rw-p 0079e000 00:00 0 007d5000-007e9000 r-xp 00000000 08:05 68363 /lib/libpthread-2.6.so 007e9000-007ea000 r--p 00013000 08:05 68363 /lib/libpthread-2.6.so 007ea000-007eb000 rw-p 00014000 08:05 68363 /lib/libpthread-2.6.so 007eb000-007ed000 rw-p 007eb000 00:00 0 08048000-08049000 r-xp 00000000 00:18 2230281 /home/andersb/work/robot/ethercat/xenomai/server/try2 08049000-0804a000 rw-p 00000000 00:18 2230281 /home/andersb/work/robot/ethercat/xenomai/server/try2 b7ef1000-b7ef2000 rw-p b7ef1000 00:00 0 b7f0e000-b7f13000 r-xp 00000000 08:05 4129197 /usr/xenomai/lib/libnative.so.1.0.0 b7f13000-b7f14000 rw-p 00004000 08:05 4129197 /usr/xenomai/lib/libnative.so.1.0.0 b7f14000-b7f15000 r-xp 00000000 08:05 4129207 /usr/xenomai/lib/librtdm.so.1.0.0 b7f15000-b7f16000 rw-p 00000000 08:05 4129207 /usr/xenomai/lib/librtdm.so.1.0.0 b7f16000-b7f17000 rw-p b7f16000 00:00 0 b7f17000-b7f18000 r-xp b7f17000 00:00 0 [vdso] bf970000-bf985000 rw-p bffeb000 00:00 0 [stack] [child = 0, 0] VmSize: 1912 kB [child = 1, 1] VmSize: 1980 kB [child = 2, 2] VmSize: 2048 kB [child = 3, 3] VmSize: 2116 kB [child = 4, 4] VmSize: 2184 kB [child = 5, 5] VmSize: 2252 kB [child = 6, 6] VmSize: 2320 kB [child = 7, 7] VmSize: 2388 kB [child = 8, 8] VmSize: 2456 kB [child = 9, 9] VmSize: 2524 kB [child = 10, 10] VmSize: 2640 kB [child = 11, 11] VmSize: 2640 kB [child = 12, 12] VmSize: 2640 kB [child = 13, 13] VmSize: 2640 kB [child = 14, 14] VmSize: 2640 kB [child = 15, 15] VmSize: 2640 kB [child = 16, 16] VmSize: 2640 kB [child = 17, 17] VmSize: 2640 kB [child = 18, 18] VmSize: 2640 kB [child = 19, 19] VmSize: 2640 kB 0062e000-00649000 r-xp 00000000 08:05 950516 /lib/ld-2.6.so 00649000-0064a000 r--p 0001a000 08:05 950516 /lib/ld-2.6.so 0064a000-0064b000 rw-p 0001b000 08:05 950516 /lib/ld-2.6.so 0064d000-0079b000 r-xp 00000000 08:05 950517 /lib/libc-2.6.so 0079b000-0079d000 r--p 0014e000 08:05 950517 /lib/libc-2.6.so 0079d000-0079e000 rw-p 00150000 08:05 950517 /lib/libc-2.6.so 0079e000-007a1000 rw-p 0079e000 00:00 0 007d5000-007e9000 r-xp 00000000 08:05 68363 /lib/libpthread-2.6.so 007e9000-007ea000 r--p 00013000 08:05 68363 /lib/libpthread-2.6.so 007ea000-007eb000 rw-p 00014000 08:05 68363 /lib/libpthread-2.6.so 007eb000-007ed000 rw-p 007eb000 00:00 0 00b68000-00b73000 r-xp 00000000 08:05 68364 /lib/libgcc_s-4.1.2-20070925.so.1 00b73000-00b74000 rw-p 0000a000 08:05 68364 /lib/libgcc_s-4.1.2-20070925.so.1 08048000-08049000 r-xp 00000000 00:18 2230281 /home/andersb/work/robot/ethercat/xenomai/server/try2 08049000-0804a000 rw-p 00000000 00:18 2230281 /home/andersb/work/robot/ethercat/xenomai/server/try2 0804a000-0806b000 rw-p 0804a000 00:00 0 [heap] b7e47000-b7e48000 ---p b7e47000 00:00 0 b7e48000-b7e58000 rw-p b7e48000 00:00 0 b7e58000-b7e59000 ---p b7e58000 00:00 0 b7e59000-b7e69000 rw-p b7e59000 00:00 0 b7e69000-b7e6a000 ---p b7e69000 00:00 0 b7e6a000-b7e7a000 rw-p b7e6a000 00:00 0 b7e7a000-b7e7b000 ---p b7e7a000 00:00 0 b7e7b000-b7e8b000 rw-p b7e7b000 00:00 0 b7e8b000-b7e8c000 ---p b7e8b000 00:00 0 b7e8c000-b7e9c000 rw-p b7e8c000 00:00 0 b7e9c000-b7e9d000 ---p b7e9c000 00:00 0 b7e9d000-b7ead000 rw-p b7e9d000 00:00 0 b7ead000-b7eae000 ---p b7ead000 00:00 0 b7eae000-b7ebe000 rw-p b7eae000 00:00 0 b7ebe000-b7ebf000 ---p b7ebe000 00:00 0 b7ebf000-b7ecf000 rw-p b7ebf000 00:00 0 b7ecf000-b7ed0000 ---p b7ecf000 00:00 0 b7ed0000-b7ee0000 rw-p b7ed0000 00:00 0 b7ee0000-b7ee1000 ---p b7ee0000 00:00 0 b7ee1000-b7ef1000 rw-p b7ee1000 00:00 0 b7ef1000-b7ef2000 rw-p b7ef1000 00:00 0 b7efc000-b7efd000 ---p b7efc000 00:00 0 b7efd000-b7f0e000 rw-p b7efd000 00:00 0 b7f0e000-b7f13000 r-xp 00000000 08:05 4129197 /usr/xenomai/lib/libnative.so.1.0.0 b7f13000-b7f14000 rw-p 00004000 08:05 4129197 /usr/xenomai/lib/libnative.so.1.0.0 b7f14000-b7f15000 r-xp 00000000 08:05 4129207 /usr/xenomai/lib/librtdm.so.1.0.0 b7f15000-b7f16000 rw-p 00000000 08:05 4129207 /usr/xenomai/lib/librtdm.so.1.0.0 b7f16000-b7f17000 rw-p b7f16000 00:00 0 b7f17000-b7f18000 r-xp b7f17000 00:00 0 [vdso] bf970000-bf985000 rw-p bffeb000 00:00 0 [stack] -- Anders Blomdell Email: anders.blomdell@domain.hid Department of Automatic Control Lund University Phone: +46 46 222 4625 P.O. Box 118 Fax: +46 46 138118 SE-221 00 Lund, Sweden