/**
* For the "greedy" migration scheme, pushes the pixmap toward being located in
* system memory.
*/
static void
exaMigrateTowardSys(ExaMigrationPtr migrate)
{
PixmapPtr pPixmap = migrate->pPix;
ExaPixmapPriv(pPixmap);
DBG_MIGRATE(("UseMem: %p score %d\n", (pointer) pPixmap,
pExaPixmap->score));
if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
return;
if (pExaPixmap->score == EXA_PIXMAP_SCORE_INIT)
pExaPixmap->score = 0;
if (pExaPixmap->score > EXA_PIXMAP_SCORE_MIN)
pExaPixmap->score--;
if (pExaPixmap->score <= EXA_PIXMAP_SCORE_MOVE_OUT && pExaPixmap->area)
exaDoMoveOutPixmap(migrate);
if (exaPixmapHasGpuCopy(pPixmap)) {
exaCopyDirtyToFb(migrate);
ExaOffscreenMarkUsed(pPixmap);
}
else
exaCopyDirtyToSys(migrate);
}
/**
* For the "greedy" migration scheme, pushes the pixmap toward being located in
* framebuffer memory.
*/
static void
exaMigrateTowardFb (PixmapPtr pPixmap)
{
ExaPixmapPriv (pPixmap);
if (pExaPixmap == NULL) {
DBG_MIGRATE(("UseScreen: ignoring exa-uncontrolled pixmap %p (%s)\n",
(pointer)pPixmap,
exaPixmapIsOffscreen(pPixmap) ? "s" : "m"));
return;
}
if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED) {
DBG_MIGRATE(("UseScreen: not migrating pinned pixmap %p\n",
(pointer)pPixmap));
return;
}
DBG_MIGRATE(("UseScreen %p score %d\n",
(pointer)pPixmap, pExaPixmap->score));
if (pExaPixmap->score == EXA_PIXMAP_SCORE_INIT) {
exaMoveInPixmap(pPixmap);
pExaPixmap->score = 0;
}
if (pExaPixmap->score < EXA_PIXMAP_SCORE_MAX)
pExaPixmap->score++;
if (pExaPixmap->score >= EXA_PIXMAP_SCORE_MOVE_IN &&
!exaPixmapIsOffscreen(pPixmap))
{
exaMoveInPixmap (pPixmap);
}
ExaOffscreenMarkUsed (pPixmap);
}
/**
* For the "greedy" migration scheme, pushes the pixmap toward being located in
* framebuffer memory.
*/
static void
exaMigrateTowardFb(ExaMigrationPtr migrate)
{
PixmapPtr pPixmap = migrate->pPix;
ExaPixmapPriv(pPixmap);
if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED) {
DBG_MIGRATE(("UseScreen: not migrating pinned pixmap %p\n",
(pointer) pPixmap));
return;
}
DBG_MIGRATE(("UseScreen %p score %d\n",
(pointer) pPixmap, pExaPixmap->score));
if (pExaPixmap->score == EXA_PIXMAP_SCORE_INIT) {
exaDoMoveInPixmap(migrate);
pExaPixmap->score = 0;
}
if (pExaPixmap->score < EXA_PIXMAP_SCORE_MAX)
pExaPixmap->score++;
if (pExaPixmap->score >= EXA_PIXMAP_SCORE_MOVE_IN &&
!exaPixmapHasGpuCopy(pPixmap)) {
exaDoMoveInPixmap(migrate);
}
if (exaPixmapHasGpuCopy(pPixmap)) {
exaCopyDirtyToFb(migrate);
ExaOffscreenMarkUsed(pPixmap);
}
else
exaCopyDirtyToSys(migrate);
}
/**
* Performs migration of the pixmaps according to the operation information
* provided in pixmaps and can_accel and the migration scheme chosen in the
* config file.
*/
void
exaDoMigration (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel)
{
ScreenPtr pScreen = pixmaps[0].pPix->drawable.pScreen;
ExaScreenPriv(pScreen);
int i, j;
/* If this debugging flag is set, check each pixmap for whether it is marked
* as clean, and if so, actually check if that's the case. This should help
* catch issues with failing to mark a drawable as dirty. While it will
* catch them late (after the operation happened), it at least explains what
* went wrong, and instrumenting the code to find what operation happened
* to the pixmap last shouldn't be hard.
*/
if (pExaScr->checkDirtyCorrectness) {
for (i = 0; i < npixmaps; i++) {
if (!exaPixmapIsDirty (pixmaps[i].pPix) &&
!exaAssertNotDirty (pixmaps[i].pPix))
ErrorF("%s: Pixmap %d dirty but not marked as such!\n", __func__, i);
}
}
/* If anything is pinned in system memory, we won't be able to
* accelerate.
*/
for (i = 0; i < npixmaps; i++) {
if (exaPixmapIsPinned (pixmaps[i].pPix) &&
!exaPixmapIsOffscreen (pixmaps[i].pPix))
{
EXA_FALLBACK(("Pixmap %p (%dx%d) pinned in sys\n", pixmaps[i].pPix,
pixmaps[i].pPix->drawable.width,
pixmaps[i].pPix->drawable.height));
can_accel = FALSE;
break;
}
}
if (pExaScr->migration == ExaMigrationSmart) {
/* If we've got something as a destination that we shouldn't cause to
* become newly dirtied, take the unaccelerated route.
*/
for (i = 0; i < npixmaps; i++) {
if (pixmaps[i].as_dst && !exaPixmapShouldBeInFB (pixmaps[i].pPix) &&
!exaPixmapIsDirty (pixmaps[i].pPix))
{
for (i = 0; i < npixmaps; i++) {
if (!exaPixmapIsDirty (pixmaps[i].pPix))
exaMoveOutPixmap (pixmaps[i].pPix);
}
return;
}
}
/* If we aren't going to accelerate, then we migrate everybody toward
* system memory, and kick out if it's free.
*/
if (!can_accel) {
for (i = 0; i < npixmaps; i++) {
exaMigrateTowardSys (pixmaps[i].pPix);
if (!exaPixmapIsDirty (pixmaps[i].pPix))
exaMoveOutPixmap (pixmaps[i].pPix);
}
return;
}
/* Finally, the acceleration path. Move them all in. */
for (i = 0; i < npixmaps; i++) {
exaMigrateTowardFb(pixmaps[i].pPix);
exaMoveInPixmap(pixmaps[i].pPix);
}
} else if (pExaScr->migration == ExaMigrationGreedy) {
/* If we can't accelerate, either because the driver can't or because one of
* the pixmaps is pinned in system memory, then we migrate everybody toward
* system memory.
*
* We also migrate toward system if all pixmaps involved are currently in
* system memory -- this can mitigate thrashing when there are significantly
* more pixmaps active than would fit in memory.
*
* If not, then we migrate toward FB so that hopefully acceleration can
* happen.
*/
if (!can_accel) {
for (i = 0; i < npixmaps; i++)
exaMigrateTowardSys (pixmaps[i].pPix);
return;
}
for (i = 0; i < npixmaps; i++) {
if (exaPixmapIsOffscreen(pixmaps[i].pPix)) {
/* Found one in FB, so move all to FB. */
for (j = 0; j < npixmaps; j++)
exaMigrateTowardFb(pixmaps[j].pPix);
return;
}
}
/* Nobody's in FB, so move all away from FB. */
for (i = 0; i < npixmaps; i++)
exaMigrateTowardSys(pixmaps[i].pPix);
} else if (pExaScr->migration == ExaMigrationAlways) {
/* Always move the pixmaps out if we can't accelerate. If we can
* accelerate, try to move them all in. If that fails, then move them
* back out.
*/
if (!can_accel) {
for (i = 0; i < npixmaps; i++)
exaMoveOutPixmap(pixmaps[i].pPix);
return;
}
/* Now, try to move them all into FB */
for (i = 0; i < npixmaps; i++) {
exaMoveInPixmap(pixmaps[i].pPix);
ExaOffscreenMarkUsed (pixmaps[i].pPix);
}
/* If we couldn't fit everything in, then kick back out */
for (i = 0; i < npixmaps; i++) {
if (!exaPixmapIsOffscreen(pixmaps[i].pPix)) {
EXA_FALLBACK(("Pixmap %p (%dx%d) not in fb\n", pixmaps[i].pPix,
pixmaps[i].pPix->drawable.width,
pixmaps[i].pPix->drawable.height));
for (j = 0; j < npixmaps; j++)
exaMoveOutPixmap(pixmaps[j].pPix);
break;
}
}
}
}
