aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAdrian Kummerlaender2020-02-02 22:43:41 +0100
committerAdrian Kummerlaender2020-02-02 22:43:41 +0100
commita90f1faedac705242a674ba94ea7bc5438cab078 (patch)
treecf31e2c7c86c10493f9009be2de34cc8ba9c5437
parentd58914164adc5876a5911edec85e2ebd43288ec9 (diff)
downloadboltzgen-master.tar
boltzgen-master.tar.gz
boltzgen-master.tar.bz2
boltzgen-master.tar.xz
boltzgen-master.zip
Implement basic multi-cuboid communication for CUDA targetHEADmaster
-rw-r--r--boltzgen/kernel/template/communicate.cuda.mako49
1 files changed, 49 insertions, 0 deletions
diff --git a/boltzgen/kernel/template/communicate.cuda.mako b/boltzgen/kernel/template/communicate.cuda.mako
new file mode 100644
index 0000000..ebc2a21
--- /dev/null
+++ b/boltzgen/kernel/template/communicate.cuda.mako
@@ -0,0 +1,49 @@
+<%
+import numpy
+
+directions = list(filter(lambda c: numpy.sum(numpy.abs(c)) == 1, descriptor.c))
+
+def name(direction):
+ names = [ ('west','','east'), ('south','','north'), ('down','','up') ]
+ return ''.join([ names[i][v+1] for i, v in enumerate(direction) ])
+
+def neighbors(direction):
+ j = list(direction).index(next(x for x in direction if x != 0))
+ return [ (i,c_i) for i, c_i in enumerate(descriptor.c) if c_i[j] == direction[j] ]
+%>
+
+% for direction in directions:
+__global__ void communicate_${name(direction)}(
+ ${float_type}** f_a
+ , ${float_type}** f_b
+ , std::size_t* cells_a
+ , std::size_t* cells_b
+ , std::size_t cell_count
+) {
+ const std::size_t index = blockIdx.x * blockDim.x + threadIdx.x;
+ if (!(index < cell_count)) {
+ return;
+ }
+ const std::size_t gid_a = cells_a[index];
+ const std::size_t gid_b = cells_b[index];
+
+% for i, c_i in neighbors(direction):
+ ${float_type}* preshifted_f_a_${i} = f_a[${i}] + ${layout.cell_preshift('gid_a')};
+ ${float_type}* preshifted_f_b_${i} = f_b[${i}] + ${layout.cell_preshift('gid_b')};
+% endfor
+
+% for i, c_i in neighbors(direction):
+ *preshifted_f_b_${i} = *preshifted_f_a_${i};
+% endfor
+
+% for i, c_i in neighbors(-direction):
+ ${float_type}* preshifted_f_a_${i} = f_a[${i}] + ${layout.cell_preshift('gid_a')};
+ ${float_type}* preshifted_f_b_${i} = f_b[${i}] + ${layout.cell_preshift('gid_b')};
+% endfor
+
+% for i, c_i in neighbors(-direction):
+ *preshifted_f_a_${i} = *preshifted_f_b_${i};
+% endfor
+}
+
+% endfor