TI ARM和DSP双核平台的一个编译例程

只看该作者 · 2019-8-1 11:24

一个适用于TI ARM与DSP双核平台的makefile。该makefile示意了如何同时编译出ARM平台和DSP平台的执行文件，以便于比较ARM核和DSP核在进行运算时表现出来的性能差异。

makefile

#############################################################################
# Makefile                                                                #
#                                                                         #
# Builds the emqbit benchmark source for ARM and DSP                      #
#############################################################################
#
#
#############################################################################
#                                                                         #
# Copyright (C) 2010 Texas Instruments Incorporated                      #
#    http://www.ti.com/                                                 #
#                                                                         #
#############################################################################
#
#
#############################################################################
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#  modification, are permitted provided that the following conditions    #
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只看该作者 · 2019-8-1 11:24

PROJNAME := matmult

# ----------------------------------------------------------------------------
# Name of the ARM GCC cross compiler
# ----------------------------------------------------------------------------
ARM_TOOLCHAIN_PREFIX ?= arm-none-linux-gnueabi-
ifdef ARM_TOOLCHAIN_PATH
ARM_CC := $(ARM_TOOLCHAIN_PATH)/bin/$(ARM_TOOLCHAIN_PREFIX)gcc
else
ARM_CC := $(ARM_TOOLCHAIN_PREFIX)gcc
endif

# Pick up any ARM compiler and linker flags from the environment
ARM_CFLAGS = $(CFLAGS)
ARM_CFLAGS += -std=gnu99 \
-Wdeclaration-after-statement -Wall -Wno-trigraphs \
-fno-strict-aliasing -fno-common -fno-omit-frame-pointer \
-c -O3
ARM_LDFLAGS = $(LDFLAGS)
ARM_LDFLAGS+=-lm

只看该作者 · 2019-8-1 11:24

# ----------------------------------------------------------------------------
# Name of the DSP compiler
# TI C6RunApp Frontend (if path variable provided, use it, otherwise assume
# the tools are in the path)
# ----------------------------------------------------------------------------
C6RUN_TOOLCHAIN_PREFIX=c6runapp-
ifdef C6RUN_TOOLCHAIN_PATH
C6RUN_CC := $(C6RUN_TOOLCHAIN_PATH)/bin/$(C6RUN_TOOLCHAIN_PREFIX)cc
else
C6RUN_CC := $(C6RUN_TOOLCHAIN_PREFIX)cc
endif

DSPLIB_PATH := $(HOME)/C64x+DSPLIB/dsplib_v210

C6RUN_CFLAGS = -c -O3 -I$(DSPLIB_PATH) -DUSE_DSPLIB
C6RUN_LDFLAGS=

只看该作者 · 2019-8-1 11:25

# ----------------------------------------------------------------------------
# List of source files
# ----------------------------------------------------------------------------
SRCS := $(PROJNAME).c
ARM_OBJS := $(SRCS:%.c=gpp/%.o)
DSP_OBJS := $(SRCS:%.c=dsp/%.o)

只看该作者 · 2019-8-1 11:25

# ----------------------------------------------------------------------------
# Makefile targets
# ----------------------------------------------------------------------------
.PHONY : dsp dsp_clean gpp gpp_clean all clean

all: dsp gpp
clean: dsp_clean gpp_clean

gpp: gpp/.created $(ARM_OBJS)
$(ARM_CC) $(ARM_LDFLAGS) -o $(PROJNAME)_gpp $(ARM_OBJS)

gpp/%.o : %.c
$(ARM_CC) $(ARM_CFLAGS) $(CINCLUDES) -o $@ $<

gpp/.created:
@mkdir -p gpp
@touch gpp/.created

gpp_clean:
@rm -Rf $(PROJNAME)_gpp
@rm -Rf gpp

dsp: dsp/.created $(DSP_OBJS)
$(C6RUN_CC) $(C6RUN_LDFLAGS) -o $(PROJNAME)_dsp $(DSP_OBJS) $(DSPLIB_PATH)/dsplib64plus.lib

dsp/%.o : %.c
$(C6RUN_CC) $(C6RUN_CFLAGS) $(CINCLUDES) -o $@ $<

dsp/.created:
@mkdir -p dsp
@touch dsp/.created

dsp_clean:
@rm -Rf $(PROJNAME)_dsp
@rm -Rf dsp

只看该作者 · 2019-8-1 11:25

源文件：
matmult.c

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#ifdef USE_DSPLIB
  #include "src/DSP_mat_mul/DSP_mat_mul.h"
#endif

// Random matrix fill
void matfill(int size, short *mat)
{
  int i, j;
  for (i = 0; i < size; i++)
  {
for (j = 0; j < size; j++)
{
   mat[j+size*i] = (short) (rand() % 100);
}
  }
}

void printmat(int size, short *mat)
{
}

只看该作者 · 2019-8-1 11:25

// Matrix multiply using Fixed point C64x+ DSPLib function
void matmult(int size, int shift, short *A, short *B, short *C)
{
#ifdef USE_DSPLIB
  DSP_mat_mul( A,size,size,
            B,    size,
            C,
            shift );
#else
  int i, j, k;
  int sum;
  for (i = 0; i < size; i++)
  {
for (j = 0; j < size; j++)
{
   sum = 0;
   for (k = 0; k < size; k++)
   {
      sum += (A[i*size + k] * B[k*size  + j]);
   }
   C[i*size + j] = sum >> shift;
}
  }
#endif
}

只看该作者 · 2019-8-1 11:26

//square matrices only
int main(int argc, char *argv[])
{
  short *A, *B, *C;
  int matsize, shift;
  time_t t;

  if (argc != 2) exit(-1);

  matsize = atoi(argv[1]);

  shift = 0;
  while ((matsize>>shift) > 0)
  {
++shift;
  }

  srand(time(NULL));

  if (matsize == 0) exit(-1);

  // Allocate space for matrices
  A = calloc(matsize*matsize, sizeof(short));
  matfill(matsize, A);

  B = calloc(matsize*matsize, sizeof(short));
  matfill(matsize, B);

  C = calloc(matsize*matsize, sizeof(short));

  // Perform multiply and time it
  t = time(NULL);
  matmult(matsize, shift, A, B, C);
  t = time(NULL) - t;
  printf("time of multiply: %d seconds\n",(int)t);

  // Free allocated spaces
  free(A);
  free(B);
  free(C);
}

只看该作者 · 2019-8-1 11:26

运行结果：

root@dm37x-evm:/opt# for i in 100 200 300 400 500 600; do ./matmult_gpp $i; done
time of multiply: 0 seconds
time of multiply: 0 seconds
time of multiply: 2 seconds
time of multiply: 6 seconds
time of multiply: 18 seconds
time of multiply: 39 seconds
root@dm37x-evm:/opt# for i in 100 200 300 400 500 600; do ./matmult_dsp $i; done
time of multiply: 0 seconds
time of multiply: 0 seconds
time of multiply: 0 seconds
time of multiply: 0 seconds
time of multiply: 1 seconds
time of multiply: 3 seconds
可见当数据量大时，DSP表现出来的性能优越性更明显。

TI ARM和DSP双核平台的一个编译例程

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