This commit improves the performance of multi-instance DGEMM when the…

…se multiple threads are binded to a CCX.

Multi-Instance: Each thread runs a sequential DGEMM.
Change-Id: I306920c8061b6dad61efac1dae68727f4ac27df6

config/zen/bli_cntx_init_zen.c

@@ -113,34 +113,60 @@ void bli_cntx_init_zen( cntx_t* cntx )
 	bli_blksz_init_easy( &blkszs[ BLIS_NR ],    16,     8,     8,     4 );
 
 /*
-	Multi Instance performance degradation on different cores
+	Multi Instance performance improvement of DGEMM when binded to a CCX
+	In Multi instance each thread runs a sequential DGEMM.
+
 	a) 	CPU freq 2.6 Ghz
-		DDR4 2400
+		DDR4 clock frequency 2400Mhz
 		Multi instance mode
                 mc = 240, kc = 512, and nc = 2040
 	
-	b)	CPU freq 2.4Ghz
-		DDR4 2400
+	b)	CPU freq 2.2Ghz
+		DDR4 clock frequency 2400Mhz
 		Multi Instance mode
 		either
 		mc = 240, kc = 512 and nc = 2040 
 			    (or)
 		mc = 390, kc = 512 and nc = 4080
 
-	c)  	Higher frequency(3.1Ghz), single instance mode choose default value
+	c)  	If BLIS is run in Single Instance mode choose 
 		mc = 510, kc = 1024 and nc = 4080
 
 */
 
 #ifdef BLIS_ENABLE_ZEN_BLOCK_SIZES
 	// Zen optmized level 3 cache block sizes
-	bli_blksz_init_easy( &blkszs[ BLIS_MC ],   144,   240,   144,    72 );
+	/************************************************************************
+		Below block sizes of DGEMM, works better in a multi instance mode,
+		for clock frequency of 2.6Ghz and DDR4 clock frequency of 2400Mhz
+	************************************************************************/
+	bli_blksz_init_easy( &blkszs[ BLIS_MC ],   144,  240,   144,    72 );
 	bli_blksz_init_easy( &blkszs[ BLIS_KC ],   256,  512,   256,   256 );
+	bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,  2040,  4080,  4080 );
+
+        /***********************************************************************************
+                Below block sizes of DGEMM, gives better performance in a multi instance mode,
+                for clock frequency of 2.2Ghz and DDR4 clock frequency of 2400Mhz
+        **************************************************************************************/
+        //bli_blksz_init_easy( &blkszs[ BLIS_MC ],   144,  390,   144,    72 );
+        //bli_blksz_init_easy( &blkszs[ BLIS_KC ],   256,  512,   256,   256 );
+        //bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,  4080,  4080,  4080 );
+
+        /******************************************************************************
+                BLIS on single instance mode, gives better perfomance with 
+		below mentioned default block size values
+        ********************************************************************************/
+        // bli_blksz_init_easy( &blkszs[ BLIS_MC ],   144,  510,   144,    72 );
+        //bli_blksz_init_easy( &blkszs[ BLIS_KC ],   256,  1024,   256,   256 );
+        //bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,  4080,  4080,  4080 );
+
 #else
+
 	bli_blksz_init_easy( &blkszs[ BLIS_MC ],   144,    72,   144,    72 );
 	bli_blksz_init_easy( &blkszs[ BLIS_KC ],   256,   256,   256,   256 );
+	bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,   4080,  4080,  4080 );
 #endif
-	bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,  2040,  4080,  4080 );
+ 	//bli_blksz_init_easy( &blkszs[ BLIS_NC ],  4080,  2040,  4080,  4080 );
 	bli_blksz_init_easy( &blkszs[ BLIS_AF ],     8,     8,    -1,    -1 );
 	bli_blksz_init_easy( &blkszs[ BLIS_DF ],     8,     8,    -1,    -1 );