forked from bartvdbraak/blender
Blender Internal: optimization to remove sleep() calls from the render threading
code. This gives a speedup up to a couple of seconds based only on the image resolution and tile size. For complex renders a second or two is not so noticeable but for quick ones it's nice to save some time. On the default cube this gives me about half a second speedup. Patch by Johan Walles, based on the render branch implementation by me.
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7a6919a74e
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6b600d0793
@ -673,6 +673,10 @@ static void *do_part_thread(void *pa_v)
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else
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zbufshade_tile(pa);
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/* we do actually write pixels, but don't allocate/deallocate anything,
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* so it is safe with other threads reading at the same time */
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BLI_rw_mutex_lock(&R.resultmutex, THREAD_LOCK_READ);
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/* merge too on break! */
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if (R.result->do_exr_tile) {
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render_result_exr_file_merge(R.result, pa->result);
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@ -686,6 +690,8 @@ static void *do_part_thread(void *pa_v)
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render_result_merge(R.result, pa->result);
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}
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}
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BLI_rw_mutex_unlock(&R.resultmutex);
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}
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pa->status = PART_STATUS_READY;
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@ -719,24 +725,33 @@ float panorama_pixel_rot(Render *re)
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return phi;
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}
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/* call when all parts stopped rendering, to find the next Y slice */
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/* if slice found, it rotates the dbase */
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static RenderPart *find_next_pano_slice(Render *re, int *minx, rctf *viewplane)
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/* for panorama, we render per Y slice, and update
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* camera parameters when we go the next slice */
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static bool find_next_pano_slice(Render *re, int *slice, int *minx, rctf *viewplane)
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{
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RenderPart *pa, *best = NULL;
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bool found = false;
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*minx = re->winx;
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if (!(re->r.mode & R_PANORAMA)) {
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/* for regular render, just one 'slice' */
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found = (*slice == 0);
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(*slice)++;
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return found;
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}
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/* most left part of the non-rendering parts */
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for (pa = re->parts.first; pa; pa = pa->next) {
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if (pa->status == PART_STATUS_NONE && pa->nr == 0) {
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if (pa->disprect.xmin < *minx) {
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found = true;
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best = pa;
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*minx = pa->disprect.xmin;
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}
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}
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}
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if (best) {
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float phi = panorama_pixel_rot(re);
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@ -754,7 +769,10 @@ static RenderPart *find_next_pano_slice(Render *re, int *minx, rctf *viewplane)
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R.panosi = sin(R.panodxp * phi);
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R.panoco = cos(R.panodxp * phi);
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}
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return best;
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(*slice)++;
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return found;
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}
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static RenderPart *find_next_part(Render *re, int minx)
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@ -809,26 +827,53 @@ static void print_part_stats(Render *re, RenderPart *pa)
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re->i.infostr = NULL;
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}
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typedef struct RenderThread {
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ThreadQueue *workqueue;
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ThreadQueue *donequeue;
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int number;
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} RenderThread;
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static void *do_render_thread(void *thread_v)
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{
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RenderThread *thread = thread_v;
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RenderPart *pa;
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while ((pa = BLI_thread_queue_pop(thread->workqueue))) {
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pa->thread = thread->number;
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do_part_thread(pa);
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BLI_thread_queue_push(thread->donequeue, pa);
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if(R.test_break(R.tbh))
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break;
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}
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return NULL;
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}
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static void threaded_tile_processor(Render *re)
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{
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RenderThread thread[BLENDER_MAX_THREADS];
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ThreadQueue *workqueue, *donequeue;
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ListBase threads;
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RenderPart *pa, *nextpa;
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RenderPart *pa;
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rctf viewplane = re->viewplane;
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int rendering = 1, counter = 1, drawtimer = 0, hasdrawn, minx = 0;
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double lastdraw, elapsed, redrawtime = 1.0f;
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int totpart = 0, minx = 0, slice = 0, a, wait;
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BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
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/* first step; free the entire render result, make new, and/or prepare exr buffer saving */
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if (re->result == NULL || !(re->r.scemode & R_PREVIEWBUTS)) {
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render_result_free(re->result);
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if (re->sss_points && render_display_draw_enabled(re))
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re->result = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);
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else if (re->r.scemode & R_FULL_SAMPLE)
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re->result = render_result_new_full_sample(re, &re->fullresult, &re->disprect, 0, RR_USE_EXR);
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else
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re->result = render_result_new(re, &re->disprect, 0,
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(re->r.scemode & R_EXR_TILE_FILE) ? RR_USE_EXR : RR_USE_MEM, RR_ALL_LAYERS);
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(re->r.scemode & R_EXR_TILE_FILE) ? RR_USE_EXR : RR_USE_MEM, RR_ALL_LAYERS);
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}
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BLI_rw_mutex_unlock(&re->resultmutex);
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@ -843,53 +888,46 @@ static void threaded_tile_processor(Render *re)
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if (re->result->do_exr_tile)
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render_result_exr_file_begin(re);
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BLI_init_threads(&threads, do_part_thread, re->r.threads);
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/* assuming no new data gets added to dbase... */
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R = *re;
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/* set threadsafe break */
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R.test_break = thread_break;
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/* timer loop demands to sleep when no parts are left, so we enter loop with a part */
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if (re->r.mode & R_PANORAMA)
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nextpa = find_next_pano_slice(re, &minx, &viewplane);
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else
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nextpa = find_next_part(re, 0);
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/* create and fill work queue */
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workqueue = BLI_thread_queue_init();
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donequeue = BLI_thread_queue_init();
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while (rendering) {
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if (re->test_break(re->tbh))
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PIL_sleep_ms(50);
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else if (nextpa && BLI_available_threads(&threads)) {
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drawtimer = 0;
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nextpa->nr = counter++; /* for nicest part, and for stats */
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nextpa->thread = BLI_available_thread_index(&threads); /* sample index */
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BLI_insert_thread(&threads, nextpa);
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nextpa = find_next_part(re, minx);
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}
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else if (re->r.mode & R_PANORAMA) {
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if (nextpa == NULL && BLI_available_threads(&threads) == re->r.threads)
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nextpa = find_next_pano_slice(re, &minx, &viewplane);
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else {
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PIL_sleep_ms(50);
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drawtimer++;
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}
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}
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else {
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PIL_sleep_ms(50);
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drawtimer++;
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/* for panorama we loop over slices */
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while (find_next_pano_slice(re, &slice, &minx, &viewplane)) {
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/* gather parts into queue */
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while ((pa = find_next_part(re, minx))) {
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pa->nr = totpart + 1; /* for nicest part, and for stats */
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totpart++;
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BLI_thread_queue_push(workqueue, pa);
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}
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/* check for ready ones to display, and if we need to continue */
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rendering = 0;
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hasdrawn = 0;
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for (pa = re->parts.first; pa; pa = pa->next) {
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if (pa->status == PART_STATUS_READY) {
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BLI_remove_thread(&threads, pa);
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BLI_thread_queue_nowait(workqueue);
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/* start all threads */
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BLI_init_threads(&threads, do_render_thread, re->r.threads);
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for (a = 0; a < re->r.threads; a++) {
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thread[a].workqueue = workqueue;
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thread[a].donequeue = donequeue;
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thread[a].number = a;
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BLI_insert_thread(&threads, &thread[a]);
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}
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/* wait for results to come back */
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lastdraw = PIL_check_seconds_timer();
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while (1) {
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elapsed = PIL_check_seconds_timer() - lastdraw;
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wait = (redrawtime - elapsed)*1000;
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/* handle finished part */
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if ((pa=BLI_thread_queue_pop_timeout(donequeue, wait))) {
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if (pa->result) {
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if (render_display_draw_enabled(re))
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re->display_draw(re->ddh, pa->result, NULL);
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@ -899,27 +937,40 @@ static void threaded_tile_processor(Render *re)
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pa->result = NULL;
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re->i.partsdone++;
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re->progress(re->prh, re->i.partsdone / (float)re->i.totpart);
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hasdrawn = 1;
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}
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totpart--;
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}
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else {
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rendering = 1;
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if (pa->nr && pa->result && drawtimer > 20) {
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if (render_display_draw_enabled(re))
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re->display_draw(re->ddh, pa->result, &pa->result->renrect);
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hasdrawn = 1;
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}
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/* check for render cancel */
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if ((g_break=re->test_break(re->tbh)))
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break;
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/* or done with parts */
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if (totpart == 0)
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break;
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/* redraw in progress parts */
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elapsed = PIL_check_seconds_timer() - lastdraw;
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if (elapsed > redrawtime) {
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if (render_display_draw_enabled(re))
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for (pa = re->parts.first; pa; pa = pa->next)
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if ((pa->status == PART_STATUS_IN_PROGRESS) && pa->nr && pa->result)
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re->display_draw(re->ddh, pa->result, &pa->result->renrect);
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lastdraw = PIL_check_seconds_timer();
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}
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}
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if (hasdrawn)
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drawtimer = 0;
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/* on break, wait for all slots to get freed */
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if ( (g_break = re->test_break(re->tbh)) && BLI_available_threads(&threads) == re->r.threads)
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rendering = 0;
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BLI_end_threads(&threads);
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if ((g_break=re->test_break(re->tbh)))
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break;
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}
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BLI_thread_queue_free(donequeue);
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BLI_thread_queue_free(workqueue);
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if (re->result->do_exr_tile) {
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BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
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render_result_exr_file_end(re);
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@ -929,7 +980,6 @@ static void threaded_tile_processor(Render *re)
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/* unset threadsafety */
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g_break = 0;
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BLI_end_threads(&threads);
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RE_parts_free(re);
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re->viewplane = viewplane; /* restore viewplane, modified by pano render */
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}
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