diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 0b5d31f..4ba702c 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -48,6 +48,7 @@
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/time.h>
+#include <time.h>
 #include <stdarg.h>
 
 /* Not all systems have MAP_FAILED defined */
@@ -1261,10 +1262,14 @@ int drmDMA(int fd, drmDMAReqPtr request)
     dma.request_sizes   = request->request_sizes;
     dma.granted_count   = 0;
 
+    clock_t czas = clock();
+
     do {
 	ret = ioctl( fd, DRM_IOCTL_DMA, &dma );
     } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY );
 
+    drmMsg("        xf86drm::drmDMA() ioctl used %d time(s), ret==%d (%.2f sec)\n", i + 1, ret, (float)(clock() - czas)/CLOCKS_PER_SEC);
+
     if ( ret == 0 ) {
 	request->granted_count = dma.granted_count;
 	return 0;