feat: reduction of writeMany/readMany calls. (#118)

Author: b4rtaz

src/tasks.cpp

@@ -49,13 +49,15 @@ void syncUnitBuffer(unsigned int nThreads, unsigned int threadIndex, Transformer
         // root
 
         unsigned int nSockets = ctx->socketPool->nSockets / nThreads + (ctx->socketPool->nSockets % nThreads > threadIndex ? 1 : 0);
-        SocketIo ios[nSockets];
-        for (int i = 0; i < nSockets; i++) {
-            ios[i].socketIndex = threadIndex + i * nThreads;
-            ios[i].data = buffer;
-            ios[i].size = bufferBytes;
+        if (nSockets > 0) {
+            SocketIo ios[nSockets];
+            for (int i = 0; i < nSockets; i++) {
+                ios[i].socketIndex = threadIndex + i * nThreads;
+                ios[i].data = buffer;
+                ios[i].size = bufferBytes;
+            }
+            ctx->socketPool->writeMany(nSockets, ios);
         }
-        ctx->socketPool->writeMany(nSockets, ios);
     } else if (ctx->socket != NULL) {
         if (threadIndex != 0) return;
 
@@ -70,54 +72,24 @@ void syncSliceOfSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, Tr
         // root
 
         unsigned int nSockets = ctx->socketPool->nSockets / nThreads + (ctx->socketPool->nSockets % nThreads > threadIndex ? 1 : 0);
-        SocketIo ios[nSockets];
-        for (int i = 0; i < nSockets; i++) {
-            int socketIndex = threadIndex + i * nThreads;
-            uint8_t workerSliceIndex = socketIndex + 1;
-            ios[i].socketIndex = socketIndex;
-            ios[i].data = ctx->transformer->buffer->getSliced(bufferIndex, workerSliceIndex);
-            ios[i].size = bufferBytes;
-        }
-
-        ctx->socketPool->readMany(nSockets, ios);
-    } else if (ctx->socket != NULL) {
-        if (threadIndex != 0) return;
-
-        // worker
-        void* buffer = ctx->transformer->buffer->getSliced(bufferIndex, ctx->transformer->sliceIndex);
-        ctx->socket->write(buffer, bufferBytes);
-    }
-}
-
-void syncMissingSlicesOfSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, uint8_t bufferIndex) {
-    size_t sliceBytes = ctx->transformer->buffer->getSlicedBytes(bufferIndex);
-    if (ctx->socketPool != NULL) {
-        // root
-
-        unsigned int nSockets = ctx->socketPool->nSockets / nThreads + (ctx->socketPool->nSockets % nThreads > threadIndex ? 1 : 0);
-        SocketIo ios[nSockets];
-
-        for (uint8_t si = 0; si < ctx->transformer->spec->nSlices - 1; si++) {
-            for (unsigned int i = 0; i < nSockets; i++) {
+        if (nSockets > 0) {
+            SocketIo ios[nSockets];
+            for (int i = 0; i < nSockets; i++) {
                 int socketIndex = threadIndex + i * nThreads;
                 uint8_t workerSliceIndex = socketIndex + 1;
-                slice_index_t sliceIndex = si < workerSliceIndex ? si : si + 1;
                 ios[i].socketIndex = socketIndex;
-                ios[i].data = ctx->transformer->buffer->getSliced(bufferIndex, sliceIndex);
-                ios[i].size = sliceBytes;
+                ios[i].data = ctx->transformer->buffer->getSliced(bufferIndex, workerSliceIndex);
+                ios[i].size = bufferBytes;
             }
-            ctx->socketPool->writeMany(nSockets, ios);
+
+            ctx->socketPool->readMany(nSockets, ios);
         }
     } else if (ctx->socket != NULL) {
         if (threadIndex != 0) return;
 
         // worker
-        for (slice_index_t sliceIndex = 0; sliceIndex < ctx->transformer->spec->nSlices; sliceIndex++) {
-            if (sliceIndex != ctx->transformer->sliceIndex) {
-                void* buffer = ctx->transformer->buffer->getSliced(bufferIndex, sliceIndex);
-                ctx->socket->read(buffer, sliceBytes);
-            }
-        }
+        void* buffer = ctx->transformer->buffer->getSliced(bufferIndex, ctx->transformer->sliceIndex);
+        ctx->socket->write(buffer, bufferBytes);
     }
 }
 
@@ -167,13 +139,15 @@ void sendPos(TASK_ARGS) {
 
     if (ctx->socketPool != NULL) {
         unsigned int nSockets = ctx->socketPool->nSockets / nThreads + (ctx->socketPool->nSockets % nThreads > threadIndex ? 1 : 0);
-        SocketIo ios[nSockets];
-        for (int i = 0; i < nSockets; i++) {
-            ios[i].socketIndex = threadIndex + i * nThreads;
-            ios[i].data = &transformer->pos;
-            ios[i].size = sizeof(pos_t);
+        if (nSockets > 0) {
+            SocketIo ios[nSockets];
+            for (int i = 0; i < nSockets; i++) {
+                ios[i].socketIndex = threadIndex + i * nThreads;
+                ios[i].data = &transformer->pos;
+                ios[i].size = sizeof(pos_t);
+            }
+            ctx->socketPool->writeMany(nSockets, ios);
         }
-        ctx->socketPool->writeMany(nSockets, ios);
     }
 }
 

src/tasks.hpp

@@ -44,7 +44,6 @@ class TransformerArch {
 
 void syncUnitBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, uint8_t bufferIndex);
 void syncSliceOfSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, uint8_t bufferIndex);
-void syncMissingSlicesOfSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, uint8_t bufferIndex);
 void quantizeUnitBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, uint8_t sourceBufferIndex, uint8_t targetBufferIndex);
 void quantizeSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, bool quantizeRootSlice, uint8_t sourceBufferIndex, uint8_t targetBufferIndex);
 void dequantizeSlicedBuffer(unsigned int nThreads, unsigned int threadIndex, TransformerContext* ctx, bool dequantizeRootSlice, uint8_t sourceBufferIndex, uint8_t targetBufferIndex);