initial subdevice support.

3 files changed, 374 insertions, 6 deletions

diff --git a/src/com/jogamp/opencl/CLDevice.java b/src/com/jogamp/opencl/CLDevice.java
index 4705d482..755f4745 100644
--- a/src/com/jogamp/opencl/CLDevice.java
+++ b/src/com/jogamp/opencl/CLDevice.java
@@ -28,9 +28,16 @@
 
 package com.jogamp.opencl;
 
+import com.jogamp.opencl.CLSubDevice.Partition;
+import com.jogamp.opencl.CLSubDevice.AffinityDomain;
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.nio.NativeSizeBuffer;
+import com.jogamp.opencl.llb.CL;
 import com.jogamp.opencl.util.CLUtil;
 import com.jogamp.opencl.spi.CLInfoAccessor;
 import java.nio.ByteOrder;
+import java.nio.IntBuffer;
+import java.nio.LongBuffer;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.EnumSet;
@@ -69,6 +76,85 @@ public class CLDevice extends CLObject {
         this.deviceInfo = platform.getAccessorFactory().createDeviceInfoAccessor(platform.getDeviceBinding(), id);
     }
 
+    /**
+     * Split the aggregate device into as many smaller aggregate devices as can be created, each containing N
+     * compute units. The value N is passed as the value accompanying this property.
+     * If N does not divide evenly into {@link #getMaxComputeUnits() } then the remaining compute units are
+     * not used.
+     */
+    public CLSubDevice[] createSubDevicesEqually(int computeUnitsPerDevice) {
+
+        LongBuffer props = Buffers.newDirectLongBuffer(3);
+        props.put(CL_DEVICE_PARTITION_EQUALLY_EXT).put(computeUnitsPerDevice).put(0).rewind();
+
+        return createSubDevices(props);
+    }
+
+    /**
+     * For each non-zero value in the list, a sub-device is created with N
+     * compute units in it.
+     */
+    public CLSubDevice[] createSubDevicesByCount(int... computeUnitsArray) {
+
+        if(computeUnitsArray.length == 0) {
+            throw new IllegalArgumentException("list was empty");
+        }
+
+        LongBuffer props = Buffers.newDirectLongBuffer(computeUnitsArray.length+3);
+        props.put(CL_DEVICE_PARTITION_BY_COUNTS_EXT);
+        for (int units : computeUnitsArray) {
+            props.put(units);
+        }
+        props.put(0).put(0).rewind();
+        return createSubDevices(props);
+    }
+
+    public CLSubDevice[] createSubDevicesByDomain(AffinityDomain domain) {
+
+        LongBuffer props = Buffers.newDirectLongBuffer(3);
+        props.put(CL_DEVICE_PARTITION_BY_AFFINITY_DOMAIN_EXT).put(domain.TYPE).put(0).rewind();
+        return createSubDevices(props);
+    }
+
+    /**
+     * Creates a devise from the supplied compute unit indices.
+     * An individual compute unit name may not appear more than once in the sub-device description.
+     */
+    public CLSubDevice createSubDeviceByIndex(int... computeUnitsIndexArray) {
+
+        if(computeUnitsIndexArray.length == 0) {
+            throw new IllegalArgumentException("list was empty");
+        }
+
+        LongBuffer props = Buffers.newDirectLongBuffer(computeUnitsIndexArray.length+3);
+        props.put(CL_DEVICE_PARTITION_BY_NAMES_EXT);
+        for (int units : computeUnitsIndexArray) {
+            props.put(units);
+        }
+        props.put(-1).put(0).rewind();
+        return createSubDevices(props)[0];
+    }
+
+    private CLSubDevice[] createSubDevices(LongBuffer props) {
+
+        CL cl = CLPlatform.getLowLevelCLInterface();
+
+        IntBuffer ib = Buffers.newDirectIntBuffer(1);
+        int ret = cl.clCreateSubDevicesEXT(ID, props, 0, null, ib);
+        CLException.checkForError(ret, "create sub devices failed");
+
+        int count = ib.get(0);
+        NativeSizeBuffer ids = NativeSizeBuffer.allocateDirect(count);
+        ret = cl.clCreateSubDevicesEXT(ID, props, count, ids, null);
+        CLException.checkForError(ret, "create sub devices failed");
+
+        CLSubDevice[] devices = new CLSubDevice[count];
+        for (int i = 0; i < devices.length; i++) {
+            devices[i] = CLSubDevice.createSubDevice(this, ids.get());
+        }
+        return devices;
+    }
+
     public CLCommandQueue createCommandQueue() {
         return createCommandQueue(0);
     }
@@ -581,6 +667,50 @@ public class CLDevice extends CLObject {
     }
 
     /**
+     * Returns all supported partition types for device fission or an empty list if fission is not possible.
+     */
+    @CLProperty("CL_DEVICE_PARTITION_TYPES")
+    public EnumSet<Partition> getPartitionTypes() {
+
+        if(!isFissionSupported()) {
+            return EnumSet.noneOf(Partition.class);
+        }
+        LongBuffer types = getInfoLongs(CL_DEVICE_PARTITION_TYPES_EXT);
+
+        List<Partition> list = new ArrayList<Partition>();
+        while(types.hasRemaining()) {
+            Partition type = Partition.valueOf((int)types.get());
+            if(type != null) {
+                list.add(type);
+            }
+        }
+        return EnumSet.copyOf(list);
+    }
+
+    /**
+     * Returns all supported partition affinity domains which can be used to partition a device.
+     * @see #createSubDevicesByDomain(com.jogamp.opencl.CLSubDevice.AffinityDomain)
+     */
+    @CLProperty("CL_DEVICE_AFFINITY_DOMAINS")
+    public EnumSet<AffinityDomain> getAffinityDomains() {
+
+        if(!getPartitionTypes().contains(Partition.DOMAIN)) {
+            return EnumSet.noneOf(AffinityDomain.class);
+        }
+
+        LongBuffer types = getInfoLongs(CL_DEVICE_AFFINITY_DOMAINS_EXT);
+
+        List<AffinityDomain> list = new ArrayList<AffinityDomain>();
+        while(types.hasRemaining()) {
+            AffinityDomain type = AffinityDomain.valueOf((int)types.get());
+            if(type != null) {
+                list.add(type);
+            }
+        }
+        return EnumSet.copyOf(list);
+    }
+
+    /**
      * Returns true if this device is available.
      */
     @CLProperty("CL_DEVICE_AVAILABLE")
@@ -642,7 +772,6 @@ public class CLDevice extends CLObject {
     public boolean isGLMemorySharingSupported() {
         return isExtensionAvailable("cl_khr_gl_sharing") || isExtensionAvailable("cl_APPLE_gl_sharing");
     }
-
     /**
      * Returns true if the extension is supported on this device.
      * @see #getExtensions()
@@ -650,7 +779,22 @@ public class CLDevice extends CLObject {
     public boolean isExtensionAvailable(String extension) {
         return getExtensions().contains(extension);
     }
-    
+
+    /**
+     * Returns true if this device can be split up in sub-devices.
+     */
+    @CLProperty("cl_ext_device_fission")
+    public boolean isFissionSupported() {
+        return isExtensionAvailable("cl_ext_device_fission");
+    }
+
+    /**
+     * Returns false.
+     */
+    public boolean isSubDevice() {
+        return false;
+    }
+
     /**
      * Returns {@link ByteOrder#LITTLE_ENDIAN} or {@link ByteOrder#BIG_ENDIAN}.
      */
@@ -694,12 +838,27 @@ public class CLDevice extends CLObject {
         return deviceInfo;
     }
 
+    private LongBuffer getInfoLongs(int flag) {
+
+        CL cl = CLPlatform.getLowLevelCLInterface();
+
+        NativeSizeBuffer nsb = NativeSizeBuffer.allocateDirect(1);
+        int ret = cl.clGetDeviceInfo(ID, flag, 0, null, nsb);
+        CLException.checkForError(ret, "clGetDeviceInfo failed");
+
+        LongBuffer types = Buffers.newDirectByteBuffer((int)nsb.get(0)).asLongBuffer();
+        ret = cl.clGetDeviceInfo(ID, flag, types.capacity()*Buffers.SIZEOF_LONG, types, null);
+        CLException.checkForError(ret, "clGetDeviceInfo failed");
+
+        return types;
+    }
+
     @Override
     public String toString() {
-        return "CLDevice [id: " + ID
-                      + " name: " + getName()
-                      + " type: " + getType()
-                      + " profile: " + getProfile()+"]";
+        return getClass().getSimpleName()+" [id: " + ID
+                                         + " name: " + getName()
+                                         + " type: " + getType()
+                                         + " profile: " + getProfile()+"]";
     }
 
     @Override
diff --git a/src/com/jogamp/opencl/CLException.java b/src/com/jogamp/opencl/CLException.java
index f776730b..0d66db69 100644
--- a/src/com/jogamp/opencl/CLException.java
+++ b/src/com/jogamp/opencl/CLException.java
@@ -147,6 +147,9 @@ public class CLException extends RuntimeException {
             case CL_PLATFORM_NOT_FOUND_KHR:                 return "CL_PLATFORM_NOT_FOUND_KHR";
             case CL_MISALIGNED_SUB_BUFFER_OFFSET:             return "CL_MISALIGNED_SUB_BUFFER_OFFSET";
             case CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST:  return "CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST";
+            case CL_DEVICE_PARTITION_FAILED_EXT:                return "CL_DEVICE_PARTITION_FAILED";
+            case CL_INVALID_PARTITION_COUNT_EXT:             return "CL_INVALID_PARTITION_COUNT";
+            case CL_INVALID_PARTITION_NAME_EXT:             return "CL_INVALID_PARTITION_NAME";
             default: return null;
         }
     }
@@ -204,6 +207,9 @@ public class CLException extends RuntimeException {
             case CL_PLATFORM_NOT_FOUND_KHR:                 return new CLPlatformNotFoundKhrException(message);
             case CL_MISALIGNED_SUB_BUFFER_OFFSET:             return new CLMisalignedSubBufferOffsetException(message);
             case CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST:  return new CLExecStatusErrorForEventsInWaitListException(message);
+            case CL_DEVICE_PARTITION_FAILED_EXT:               return new CLDevicePartitionFailedException(message);
+            case CL_INVALID_PARTITION_COUNT_EXT:              return new CLInvalidPartitionCountException(message);
+            case CL_INVALID_PARTITION_NAME_EXT:              return new CLInvalidPartitionNameException(message);
             default: return null;
         }
     }
@@ -769,4 +775,37 @@ public class CLException extends RuntimeException {
         }
     }
 
+    /**
+     * {@link CLException} thrown on CL.CL_DEVICE_PARTITION_FAILED_EXT errors.
+     * @author Michael Bien
+     */
+    public final static class CLDevicePartitionFailedException extends CLException {
+        private static final long serialVersionUID = CLException.serialVersionUID+CL_DEVICE_PARTITION_FAILED_EXT;
+        public CLDevicePartitionFailedException(String message) {
+            super(CL_DEVICE_PARTITION_FAILED_EXT, "CL_DEVICE_PARTITION_FAILED", message);
+        }
+    }
+
+    /**
+     * {@link CLException} thrown on CL.CL_INVALID_PARTITION_COUNT_EXT errors.
+     * @author Michael Bien
+     */
+    public final static class CLInvalidPartitionCountException extends CLException {
+        private static final long serialVersionUID = CLException.serialVersionUID+CL_INVALID_PARTITION_COUNT_EXT;
+        public CLInvalidPartitionCountException(String message) {
+            super(CL_INVALID_PARTITION_COUNT_EXT, "CL_INVALID_PARTITION_COUNT", message);
+        }
+    }
+
+    /**
+     * {@link CLException} thrown on CL.CL_INVALID_PARTITION_NAME_EXT errors.
+     * @author Michael Bien
+     */
+    public final static class CLInvalidPartitionNameException extends CLException {
+        private static final long serialVersionUID = CLException.serialVersionUID+CL_INVALID_PARTITION_NAME_EXT;
+        public CLInvalidPartitionNameException(String message) {
+            super(CL_INVALID_PARTITION_NAME_EXT, "CL_INVALID_PARTITION_NAME", message);
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/src/com/jogamp/opencl/CLSubDevice.java b/src/com/jogamp/opencl/CLSubDevice.java
new file mode 100644
index 00000000..68cbe9dc
--- /dev/null
+++ b/src/com/jogamp/opencl/CLSubDevice.java
@@ -0,0 +1,170 @@
+/*
+ * Created on Wednesday, July 13 2011 00:50
+ */
+package com.jogamp.opencl;
+
+import com.jogamp.opencl.llb.CL;
+
+import static com.jogamp.opencl.llb.CL.*;
+
+/**
+ * A subdevice created through device fission.
+ * A subdevice can be used like any other device but must be released if no longer needed.
+ * <p>
+ * possible usecases for device fission:
+ * <ul>
+ * <li> To reserve part of the device for use for high priority / latency-sensitive tasks </li>
+ * <li> To more directly control the assignment of work to individual compute units </li>
+ * <li> To subdivide compute devices along some shared hardware feature like a cache </li>
+ * </ul>
+ * </p>
+ * @see CLDevice#createSubDevicesEqually(int)
+ * @see CLDevice#createSubDevicesByCount(int[])
+ * @see CLDevice#createSubDeviceByIndex(int[])
+ * @see CLDevice#createSubDevicesByDomain(com.jogamp.opencl.CLSubDevice.AffinityDomain)
+ * @author Michael Bien
+ */
+public class CLSubDevice extends CLDevice implements CLResource {
+
+    private volatile boolean released;
+
+    private final CLDevice parent;
+
+    private CLSubDevice(CLDevice parent, CLContext context, long id) {
+        super(context, id);
+        this.parent = parent;
+    }
+
+    private CLSubDevice(CLDevice parent, CLPlatform platform, long id) {
+        super(platform, id);
+        this.parent = parent;
+    }
+
+    static CLSubDevice createSubDevice(CLDevice device, long id) {
+        if(device.context == null) {
+            return new CLSubDevice(device, device.getPlatform(), id);
+        }else{
+            return new CLSubDevice(device, device.getContext(), id);
+        }
+    }
+
+    /**
+     * Returns the parent device which may be a CLDevice or another CLSubDevice.
+     */
+    public CLDevice getParent() {
+        return parent;
+    }
+
+    @Override
+    public void release() {
+        if(released) {
+            throw new RuntimeException("already released");
+        }
+        released = true;
+        CL cl = CLPlatform.getLowLevelCLInterface();
+        int ret = cl.clReleaseDeviceEXT(ID);
+        CLException.checkForError(ret, "release failed");
+    }
+
+    @Override
+    public boolean isReleased() {
+        return released;
+    }
+
+    @Override
+    public boolean isSubDevice() {
+        return true;
+    }
+
+
+    /**
+     * Sub device affinity domains.
+     * @see CLDevice#createSubDevicesByDomain(com.jogamp.opencl.CLSubDevice.AffinityDomain) 
+     */
+    public enum AffinityDomain {
+
+        L1_CACHE(CL_AFFINITY_DOMAIN_L1_CACHE_EXT),
+
+        L2_CACHE(CL_AFFINITY_DOMAIN_L2_CACHE_EXT),
+
+        L3_CACHE(CL_AFFINITY_DOMAIN_L3_CACHE_EXT),
+
+        L4_CACHE(CL_AFFINITY_DOMAIN_L4_CACHE_EXT),
+
+        NUMA(CL_AFFINITY_DOMAIN_NUMA_EXT),
+
+        NEXT_FISSIONABLE(CL_AFFINITY_DOMAIN_NEXT_FISSIONABLE_EXT);
+
+        /**
+         * Value of wrapped OpenCL value.
+         */
+        public final int TYPE;
+
+        private AffinityDomain(int type) {
+            this.TYPE = type;
+        }
+
+        /**
+         * Returns the matching AffinityDomain for the given cl flag.
+         */
+        public static AffinityDomain valueOf(int domain) {
+            AffinityDomain[] values = AffinityDomain.values();
+            for (AffinityDomain value : values) {
+                if(value.TYPE == domain)
+                    return value;
+            }
+            return null;
+        }
+
+    }
+
+    /**
+     * Sub device partition styles.
+     * @see CLDevice#getPartitionTypes()
+     */
+    public enum Partition {
+
+        /**
+         * @see CLDevice#createSubDevicesEqually(int)
+         */
+        EQUALLY(CL_DEVICE_PARTITION_EQUALLY_EXT),
+
+        /**
+         * @see CLDevice#createSubDevicesByCount(int[])
+         */
+        COUNTS(CL_DEVICE_PARTITION_BY_COUNTS_EXT),
+
+        /**
+         * @see CLDevice#createSubDeviceByIndex(int[])
+         */
+        NAMES(CL_DEVICE_PARTITION_BY_NAMES_EXT),
+
+        /**
+         * @see CLDevice#createSubDevicesByDomain(com.jogamp.opencl.CLSubDevice.AffinityDomain)
+         */
+        DOMAIN(CL_DEVICE_PARTITION_BY_AFFINITY_DOMAIN_EXT);
+
+        /**
+         * Value of wrapped OpenCL value.
+         */
+        public final int FLAG;
+
+        private Partition(int type) {
+            this.FLAG = type;
+        }
+
+        /**
+         * Returns the matching AffinityDomain for the given cl flag.
+         */
+        public static Partition valueOf(int domain) {
+            Partition[] values = Partition.values();
+            for (Partition value : values) {
+                if(value.FLAG == domain)
+                    return value;
+            }
+            return null;
+        }
+
+    }
+
+}