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-rw-r--r--algorithms/burning-ship-lattice.c12
-rw-r--r--algorithms/burning-ship.c12
-rw-r--r--algorithms/mandelbrot.c12
-rw-r--r--fractal-gen.c43
-rw-r--r--fractal-gen.h1
5 files changed, 46 insertions, 34 deletions
diff --git a/algorithms/burning-ship-lattice.c b/algorithms/burning-ship-lattice.c
index 60851cc..cb3e268 100644
--- a/algorithms/burning-ship-lattice.c
+++ b/algorithms/burning-ship-lattice.c
@@ -42,12 +42,12 @@ void *generate_burning_ship_lattice_section(void *section)
double left = -1.8f;
/* FIXME document this */
- b = (d->core*(size_units/size)+top);
+ b = clust_id*(size_units/size)+top; /* FIXME document this */
- for (y = d->core; y < size; y += cores)
+ for (y = clust_id; y < size; y+=clust_total)
{
- a = clust_id*(size_units/size)+left; /* FIXME document this */
- for (x = clust_id; x < size; x+=clust_total)
+ a = d->core*(size_units/size)+left;
+ for (x = d->core; x < size; x += cores)
{
z = 0;
c = a+I*b;
@@ -59,9 +59,9 @@ void *generate_burning_ship_lattice_section(void *section)
z = cpow( fabs(creal(z)) + I*fabs(cimag(z)) , power) + c;
}
d->data[d->idx++] = (255*i)/iterat;
- a += (clust_total*size_units)/size;
+ a += cores*(size_units/size);
}
- b += (cores*size_units)/size;
+ b += clust_total*(size_units/size);
}
return NULL;
}
diff --git a/algorithms/burning-ship.c b/algorithms/burning-ship.c
index 5f14c1d..6aea927 100644
--- a/algorithms/burning-ship.c
+++ b/algorithms/burning-ship.c
@@ -38,12 +38,12 @@ void *generate_burning_ship_section(void *section)
double left = -2.2f;
/* FIXME document this */
- b = (d->core*(size_units/size)+top);
+ b = clust_id*(size_units/size)+top; /* FIXME document this */
- for (y = d->core; y < size; y += cores)
+ for (y = clust_id; y < size; y += clust_total)
{
- a = clust_id*(size_units/size)+left; /* FIXME document this */
- for (x = clust_id; x < size; x+=clust_total)
+ a = d->core*(size_units/size)+left;
+ for (x = d->core; x < size; x += cores)
{
z = 0;
c = a+I*b;
@@ -55,9 +55,9 @@ void *generate_burning_ship_section(void *section)
z = cpow( fabs(creal(z)) + I*fabs(cimag(z)) , power) + c;
}
d->data[d->idx++] = (255*i)/iterat;
- a += (clust_total*size_units)/size;
+ a += cores*(size_units/size);
}
- b += (cores*size_units)/size;
+ b += clust_total*(size_units/size);
}
return NULL;
}
diff --git a/algorithms/mandelbrot.c b/algorithms/mandelbrot.c
index 1f95843..2d0a2b4 100644
--- a/algorithms/mandelbrot.c
+++ b/algorithms/mandelbrot.c
@@ -39,12 +39,12 @@ void *generate_mandelbrot_section(void *section)
/* FIXME document this */
- b = (d->core*(size_units/size)+top);
+ b = clust_id*(size_units/size)+top; /* FIXME document this */
- for (y = d->core; y < size; y += cores)
+ for (y = clust_id; y < size; y += clust_total)
{
- a = clust_id*(size_units/size)+left; /* FIXME document this */
- for (x = clust_id; x < size; x+=clust_total)
+ a = d->core*(size_units/size)+left;
+ for (x = d->core; x < size; x += cores)
{
z = 0;
c = a + I*b;
@@ -56,9 +56,9 @@ void *generate_mandelbrot_section(void *section)
z = cpow(z , power) + c;
}
d->data[d->idx++] = (255*i)/iterat;
- a += (clust_total*size_units)/size;
+ a += cores*(size_units/size);
}
- b += (cores*size_units)/size;
+ b += clust_total*(size_units/size);
}
return NULL;
}
diff --git a/fractal-gen.c b/fractal-gen.c
index 9ceef5d..612e7ce 100644
--- a/fractal-gen.c
+++ b/fractal-gen.c
@@ -45,12 +45,15 @@ static struct section_generator generators[] = {
int main(int argc, char **argv)
{
unsigned long x = 0;
+ unsigned long width = 0;
+ size_t toalloc = 0;
unsigned long y = 0;
unsigned long i = 0;
double ram_nice = 0.f; /* Forecast RAM usage, divided down to < 1024 */
char* ram_unit = NULL; /* Unit for ram_nice */
char* bname = NULL;
data_section* sections = NULL;
+ data_section *s = NULL;
generator_func generator = NULL;
/* who are we? */
@@ -102,16 +105,16 @@ int main(int argc, char **argv)
{
/* A bit complex, icky, will document later */
if (i < (size%cores))
- x = (size/cores)+1;
+ width = (size/cores)+1;
else
- x = (size/cores);
+ width = (size/cores);
- x *= size;
- x = ceilf((double)x/clust_total);
+ toalloc = width*size;
+ toalloc = ceilf((double)toalloc/clust_total);
- if ((sections[i].data = malloc(x)) == NULL)
+ if ((sections[i].data = malloc(toalloc)) == NULL)
{
- fprintf(stderr, "\nmalloc of %lu bytes failed\n", x);
+ fprintf(stderr, "\nmalloc of %lu bytes failed\n", toalloc);
perror("malloc");
/* Free already allocated chunks of memory */
@@ -123,14 +126,18 @@ int main(int argc, char **argv)
return 1;
}
sections[i].core = i;
- sections[i].datasize = x;
+ sections[i].width = width;
+ sections[i].datasize = toalloc;
fprintf(stderr, " -> Thread %lu\r", i);
pthread_create(&sections[i].thread, NULL, generator, &(sections[i]));
}
- while((x = sections[0].idx) < sections[0].datasize)
+ s = &(sections[cores-1]);
+ while((x = s->idx) < s->datasize)
{
- fprintf(stderr, "Thread 0: %.4f%%\r", 100.f*(double)x/sections[0].datasize );
+ fprintf(stderr, "Thread %d: %.4f%%\r",
+ cores-1,
+ 100.f*(double)x/s->datasize);
sleep(1);
}
@@ -140,14 +147,18 @@ int main(int argc, char **argv)
/* Output PGM Header */
- printf("P5\n%d\n%d\n255\n",size/clust_total,size);
-
- /* Vomit the data segments back onto the screen, deinterlacing
- * TO DO: look at fwrite performance benefits over putchar */
- for (y = 0; y < size; y++)
- for (x = 0; x < size/clust_total; x++)
- putchar(sections[y%cores].data[(y/cores)*(size/clust_total) + x]);
+ printf("P5\n%d\n%d\n255\n",size,size/clust_total);
+ /* Vomit the data segments onto stdout, interlacing frames from threads
+ * FIXME: look at buffering if at all possible */
+ for (y = 0; y < size/clust_total; y++)
+ {
+ for (x = 0; x < size; x++)
+ {
+ s = &(sections[x%cores]);
+ putchar(s->data[y*(s->width) + x/cores]);
+ }
+ }
fprintf(stderr, "\nDone\n");
/* Free the memory we allocated for point data */
diff --git a/fractal-gen.h b/fractal-gen.h
index 392f43a..9c9a768 100644
--- a/fractal-gen.h
+++ b/fractal-gen.h
@@ -32,6 +32,7 @@ typedef struct
{
volatile unsigned long idx;
unsigned long core;
+ unsigned long width;
unsigned long datasize;
char* data;
pthread_t thread;
generated by cgit v1.1 at 2024-12-25 07:43:02 +0000