[Mesa-dev] [PATCH mesa 1/2] Add processor topology calculation implementation for Darwin/OSX targets.
Jeremy Huddleston Sequoia
jeremyhu at apple.com
Wed Mar 14 23:19:37 UTC 2018
From: Apple SWE <jeremyhu at apple.com>
The implementation for bootstrapping SWR on Darwin targets is based on the Linux version.
Instead of reading the output of /proc/cpuinfo, sysctlbyname is used to determine the
physical identifiers, processor identifiers, core counts and thread-processor affinities.
With this patch, it is possible to use SWR as an alternate renderer on OSX to softpipe and
llvmpipe.
Reviewed-by: Jeremy Huddleston Sequoia <jeremyhu at apple.com>
Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu at apple.com>
---
.../drivers/swr/rasterizer/core/threads.cpp | 56 +++++++++++++++++++++-
1 file changed, 55 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/swr/rasterizer/core/threads.cpp b/src/gallium/drivers/swr/rasterizer/core/threads.cpp
index 4d79168d2d..3eb20abcbf 100644
--- a/src/gallium/drivers/swr/rasterizer/core/threads.cpp
+++ b/src/gallium/drivers/swr/rasterizer/core/threads.cpp
@@ -36,6 +36,11 @@
#include <unistd.h>
#endif
+#ifdef __APPLE__
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+
#include "common/os.h"
#include "context.h"
#include "frontend.h"
@@ -219,6 +224,56 @@ void CalculateProcessorTopology(CPUNumaNodes& out_nodes, uint32_t& out_numThread
#elif defined(__APPLE__)
+ auto numProcessors = 0;
+ auto numCores = 0;
+ auto numPhysicalIds = 0;
+
+ int value;
+ size_t size = sizeof(value);
+
+ int result = sysctlbyname("hw.packages", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numPhysicalIds = value;
+
+ result = sysctlbyname("hw.logicalcpu", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numProcessors = value;
+
+ result = sysctlbyname("hw.physicalcpu", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numCores = value;
+
+ out_nodes.resize(numPhysicalIds);
+
+ for (auto physId = 0; physId < numPhysicalIds; ++physId)
+ {
+ auto &numaNode = out_nodes[physId];
+ auto procId = 0;
+
+ numaNode.cores.resize(numCores);
+
+ while (procId < numProcessors)
+ {
+ for (auto coreId = 0; coreId < numaNode.cores.size(); ++coreId, ++procId)
+ {
+ auto &core = numaNode.cores[coreId];
+
+ core.procGroup = coreId;
+ core.threadIds.push_back(procId);
+ }
+ }
+ }
+
+ out_numThreadsPerProcGroup = 0;
+
+ for (auto &node : out_nodes)
+ {
+ for (auto &core : node.cores)
+ {
+ out_numThreadsPerProcGroup += core.threadIds.size();
+ }
+ }
+
#else
#error Unsupported platform
@@ -253,7 +308,6 @@ void CalculateProcessorTopology(CPUNumaNodes& out_nodes, uint32_t& out_numThread
}
}
-
void bindThread(SWR_CONTEXT* pContext, uint32_t threadId, uint32_t procGroupId = 0, bool bindProcGroup=false)
{
// Only bind threads when MAX_WORKER_THREADS isn't set.
--
2.16.1 (Apple Git-102)
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