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test: Look at Present scaling with number of cpus 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-03-16 13:51:15 +00:00
parent ed83d92b50
commit 68913715a2
1 changed files with 54 additions and 0 deletions
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54
test/present-speed.c
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@ -52,6 +52,7 @@
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <sys/wait.h>
#include "dri3.h"
@ -119,6 +120,9 @@ static int
_check_error_handler(Display *display,
XErrorEvent *event)
{
if (_x_error_occurred < 0)
return True;
printf("X11 error from display %s, serial=%ld, error=%d, req=%d.%d\n",
DisplayString(display),
event->serial,
@ -312,6 +316,7 @@ static void run(Display *dpy, Window win, const char *name, unsigned options)
if (_x_error_occurred)
abort();
_x_error_occurred = -1;
xcb_present_select_input(c, eid, win, 0);
XSync(dpy, True);
xcb_unregister_for_special_event(c, Q);
@ -329,6 +334,51 @@ static void run(Display *dpy, Window win, const char *name, unsigned options)
completed / (elapsed(&start, &end) / 1000000));
}
static int isqrt(int x)
{
int i;
for (i = 2; i*i < x; i++)
;
return i;
}
static void siblings(int max_width, int max_height, int ncpus, unsigned options)
{
int sq_ncpus = isqrt(ncpus);
int width = max_width / sq_ncpus;
int height = max_height/ sq_ncpus;
int child;
if (ncpus <= 1)
return;
for (child = 0; child < ncpus; child++) {
for (; fork() == 0; exit(0)) {
int x = (child % sq_ncpus) * width;
int y = (child / sq_ncpus) * height;
XSetWindowAttributes attr = { .override_redirect = 1 };
Display *dpy = XOpenDisplay(NULL);
Window win = XCreateWindow(dpy, DefaultRootWindow(dpy),
x, y, width, height, 0,
DefaultDepth(dpy, DefaultScreen(dpy)),
InputOutput,
DefaultVisual(dpy, DefaultScreen(dpy)),
CWOverrideRedirect, &attr);
XMapWindow(dpy, win);
run(dpy, win, "sibling", options);
}
}
while (child) {
int status = -1;
pid_t pid = wait(&status);
if (pid == -1)
continue;
child--;
}
}
static int has_present(Display *dpy)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
@ -551,6 +601,10 @@ static void loop(Display *dpy, XRRScreenResources *res, unsigned options)
XDestroyWindow(dpy, win);
XSync(dpy, True);
siblings(mode->width, mode->height,
sysconf(_SC_NPROCESSORS_ONLN),
options);
XRRSetCrtcConfig(dpy, res, output->crtcs[c], CurrentTime,
0, 0, None, RR_Rotate_0, NULL, 0);
}