Hi, I want to measure the latency of my linux box before installing the low lat kernel. I found the latencytest0.42-png program. When compiling I get some warnings (see below) anton@stereocilia:~/latencytest0.42-png> make gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c latencytest.c latencytest.c: In function `main': latencytest.c:156: warning: passing arg 2 of `signal' from incompatible pointer type latencytest.c:157: warning: passing arg 2 of `signal' from incompatible pointer type gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c gfx.c gcc -o latencytest latencytest.o gfx.o -lm -lgd -lpng gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c rtc_latencytest.c rtc_latencytest.c: In function `main': rtc_latencytest.c:142: warning: passing arg 2 of `signal' from incompatible pointer type rtc_latencytest.c:143: warning: passing arg 2 of `signal' from incompatible pointer type gcc -o rtc_latencytest rtc_latencytest.o gfx.o -lm -lgd -lpng Running ./do_tests gives me lots of errors: anton@stereocilia:~/latencytest0.42-png> ./do_tests mlockall() failed, exiting. mlock: Operation not permitted x11perf - X11 performance program, version 1.5 The XFree86 Project, Inc server version 40200000 on :0.0 from stereocilia Sun Nov 10 18:03:41 2002 Sync time adjustment is 0.1274 msecs. 20000 reps @ 0.4161 msec ( 2400.0/sec): Scroll 500x500 pixels [more output here] 1200 reps @ 5.9190 msec ( 169.0/sec): ShmPutImage 500x500 square [more output here] mv: cannot stat `out.png': No such file or directory mlockall() failed, exiting. mlock: Operation not permitted mv: cannot stat `out.png': No such file or directory mlockall() failed, exiting. mlock: Operation not permitted head: /dev/zero: invalid number of bytes mv: cannot stat `out.png': No such file or directory -rw-r--r-- 1 anton users 0 2002-11-10 18:05 tmpfile mlockall() failed, exiting. mlock: Operation not permitted mv: cannot stat `out.png': No such file or directory -rw-r--r-- 1 anton users 0 2002-11-10 18:05 tmpfile -rw-r--r-- 1 anton users 0 2002-11-10 18:05 tmpfile2 mlockall() failed, exiting. mlock: Operation not permitted -rw-r--r-- 1 anton users 0 2002-11-10 18:05 tmpfile -rw-r--r-- 1 anton users 0 2002-11-10 18:05 tmpfile2 mv: cannot stat `out.png': No such file or directory I am using Suse 8.1 with the default 2.4.19 kernel. It is probably something very stupid but I cannot figure out what. Any help would be appreciated. Regards Anton