PrIM -- first commit

8 files changed, 661 insertions, 0 deletions

diff --git a/HST-L/Makefile b/HST-L/Makefile
new file mode 100644
index 0000000..fb1ce5a
--- /dev/null
+++ b/HST-L/Makefile
@@ -0,0 +1,46 @@
+DPU_DIR := dpu
+HOST_DIR := host
+BUILDDIR ?= bin
+NR_TASKLETS ?= 16
+BL ?= 8
+NR_DPUS ?= 1
+NR_HISTO ?= 1
+ENERGY ?= 0
+
+define conf_filename
+	${BUILDDIR}/.NR_DPUS_$(1)_NR_TASKLETS_$(2)_BL_$(3)_NR_DPUS_$(4).conf
+endef
+CONF := $(call conf_filename,${NR_DPUS},${NR_TASKLETS},${BL},${NR_DPUS})
+
+HOST_TARGET := ${BUILDDIR}/host_code
+DPU_TARGET := ${BUILDDIR}/dpu_code
+
+COMMON_INCLUDES := support
+HOST_SOURCES := $(wildcard ${HOST_DIR}/*.c)
+DPU_SOURCES := $(wildcard ${DPU_DIR}/*.c)
+
+.PHONY: all clean test
+
+__dirs := $(shell mkdir -p ${BUILDDIR})
+
+COMMON_FLAGS := -Wall -Wextra -g -I${COMMON_INCLUDES}
+HOST_FLAGS := ${COMMON_FLAGS} -std=c11 -O3 `dpu-pkg-config --cflags --libs dpu` -DNR_TASKLETS=${NR_TASKLETS} -DNR_DPUS=${NR_DPUS} -DBL=${BL} -DENERGY=${ENERGY}
+DPU_FLAGS := ${COMMON_FLAGS} -O2 -DNR_TASKLETS=${NR_TASKLETS} -DBL=${BL} -DNR_HISTO=${NR_HISTO} 
+
+all: ${HOST_TARGET} ${DPU_TARGET}
+
+${CONF}:
+	$(RM) $(call conf_filename,*,*)
+	touch ${CONF}
+
+${HOST_TARGET}: ${HOST_SOURCES} ${COMMON_INCLUDES} ${CONF}
+	$(CC) -o $@ ${HOST_SOURCES} ${HOST_FLAGS}
+
+${DPU_TARGET}: ${DPU_SOURCES} ${COMMON_INCLUDES} ${CONF}
+	dpu-upmem-dpurte-clang ${DPU_FLAGS} -o $@ ${DPU_SOURCES}
+
+clean:
+	$(RM) -r $(BUILDDIR)
+
+test: all
+	./${HOST_TARGET}
diff --git a/HST-L/dpu/task.c b/HST-L/dpu/task.c
new file mode 100644
index 0000000..356b2f9
--- /dev/null
+++ b/HST-L/dpu/task.c
@@ -0,0 +1,142 @@
+/*
+* Histogram (HST-L) with multiple tasklets
+*
+*/
+#include <stdint.h>
+#include <stdio.h>
+#include <defs.h>
+#include <mram.h>
+#include <alloc.h>
+#include <perfcounter.h>
+#include <barrier.h>
+#include <atomic_bit.h>
+#include <mutex.h>
+
+#include "../support/common.h"
+
+__host dpu_arguments_t DPU_INPUT_ARGUMENTS;
+
+// Array for communication between adjacent tasklets
+uint32_t* message[NR_TASKLETS];
+// DPU histogram
+uint32_t* histo_dpu;
+
+// Barrier
+BARRIER_INIT(my_barrier, NR_TASKLETS);
+ATOMIC_BIT_INIT(barriers_mutexes)[NR_HISTO];
+barrier_t barriers[NR_HISTO];
+
+// Mutex
+mutex_id_t my_mutex[NR_HISTO];
+
+// Histogram in each tasklet
+static void histogram(uint32_t* histo, uint32_t bins, T *input, uint32_t histo_id, unsigned int l_size){
+    for(unsigned int j = 0; j < l_size; j++) {
+        T d = (input[j] * bins) >> DEPTH;
+        mutex_lock(my_mutex[histo_id]);
+        histo[d] += 1;
+        mutex_unlock(my_mutex[histo_id]);
+    }
+}
+
+extern int main_kernel1(void);
+
+int (*kernels[nr_kernels])(void) = {main_kernel1};
+
+int main(void) { 
+    // Kernel
+    return kernels[DPU_INPUT_ARGUMENTS.kernel](); 
+}
+
+// main_kernel1
+int main_kernel1() {
+    unsigned int tasklet_id = me();
+#if PRINT
+    printf("tasklet_id = %u\n", tasklet_id);
+#endif
+    unsigned int l_tasklet_id = tasklet_id / NR_HISTO;
+    unsigned int nr_l_tasklet = NR_TASKLETS / NR_HISTO;
+    unsigned int my_histo_id = tasklet_id & (NR_HISTO - 1);
+
+    if (tasklet_id == 0){ // Initialize once the cycle counter
+        mem_reset(); // Reset the heap
+        // Initialize barriers
+        for (unsigned int each_barrier = 0; each_barrier < NR_HISTO; each_barrier++) {
+            barriers[each_barrier].wait_queue = 0xff;
+            barriers[each_barrier].count = nr_l_tasklet;
+            barriers[each_barrier].initial_count = nr_l_tasklet;
+            barriers[each_barrier].lock = (uint8_t) &ATOMIC_BIT_GET(barriers_mutexes)[each_barrier];
+        }
+    }
+    // Barrier
+    barrier_wait(&my_barrier);
+
+    uint32_t input_size_dpu_bytes = DPU_INPUT_ARGUMENTS.size;
+    uint32_t input_size_dpu_bytes_transfer = DPU_INPUT_ARGUMENTS.transfer_size; // Transfer input size per DPU in bytes
+    uint32_t bins = DPU_INPUT_ARGUMENTS.bins;
+
+    // Address of the current processing block in MRAM
+    uint32_t base_tasklet = tasklet_id << BLOCK_SIZE_LOG2;
+    uint32_t mram_base_addr_A = (uint32_t)DPU_MRAM_HEAP_POINTER;
+    uint32_t mram_base_addr_histo = (uint32_t)(DPU_MRAM_HEAP_POINTER + input_size_dpu_bytes_transfer);
+
+    // Initialize a local cache to store the MRAM block
+    T *cache_A = (T *) mem_alloc(BLOCK_SIZE);
+	
+    // Local histogram
+    if (tasklet_id < NR_HISTO){ // Allocate DPU histogram
+        uint32_t *histo = (uint32_t *) mem_alloc(bins * sizeof(uint32_t));
+        message[tasklet_id] = histo;
+    }
+    // Barrier
+    barrier_wait(&barriers[my_histo_id]);
+
+    uint32_t *my_histo = message[my_histo_id];
+
+    // Initialize local histogram
+    for(unsigned int i = l_tasklet_id; i < bins; i += nr_l_tasklet){
+        my_histo[i] = 0;
+    }
+    // Barrier
+    barrier_wait(&barriers[my_histo_id]);
+
+    // Compute histogram
+    for(unsigned int byte_index = base_tasklet; byte_index < input_size_dpu_bytes; byte_index += BLOCK_SIZE * NR_TASKLETS){
+
+        // Bound checking
+        uint32_t l_size_bytes = (byte_index + BLOCK_SIZE >= input_size_dpu_bytes) ? (input_size_dpu_bytes - byte_index) : BLOCK_SIZE;
+
+        // Load cache with current MRAM block
+        mram_read((const __mram_ptr void*)(mram_base_addr_A + byte_index), cache_A, l_size_bytes);
+
+        // Histogram in each tasklet
+        histogram(my_histo, bins, cache_A, my_histo_id, l_size_bytes >> DIV);
+    }
+
+    // Barrier
+    barrier_wait(&my_barrier);
+
+    uint32_t *histo_dpu = message[0];
+    for (unsigned int i = tasklet_id; i < bins; i += NR_TASKLETS){
+        uint32_t b = 0;
+        for (unsigned int j = 0; j < NR_HISTO; j++){			
+            b += *(message[j] + i);
+        }
+        histo_dpu[i] = b;
+    }
+
+    // Barrier
+    barrier_wait(&my_barrier);
+
+    // Write dpu histogram to current MRAM block
+    if(tasklet_id == 0){
+        if(bins * sizeof(uint32_t) <= 2048)
+            mram_write(histo_dpu, (__mram_ptr void*)(mram_base_addr_histo), bins * sizeof(uint32_t));
+        else 
+            for(unsigned int offset = 0; offset < ((bins * sizeof(uint32_t)) >> 11); offset++){
+    	        mram_write(histo_dpu + (offset << 9), (__mram_ptr void*)(mram_base_addr_histo + (offset << 11)), 2048);
+            }
+    }
+
+    return 0;
+}
diff --git a/HST-L/host/app.c b/HST-L/host/app.c
new file mode 100644
index 0000000..09ab578
--- /dev/null
+++ b/HST-L/host/app.c
@@ -0,0 +1,285 @@
+/**
+* app.c
+* HST-L Host Application Source File
+*
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <math.h>
+#include <dpu.h>
+#include <dpu_log.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <assert.h>
+
+#include "../support/common.h"
+#include "../support/timer.h"
+#include "../support/params.h"
+
+// Define the DPU Binary path as DPU_BINARY here
+#ifndef DPU_BINARY
+#define DPU_BINARY "./bin/dpu_code"
+#endif
+
+#if ENERGY
+#include <dpu_probe.h>
+#endif
+
+// Pointer declaration
+static T* A;
+static unsigned int* histo_host;
+static unsigned int* histo;
+
+// Create input arrays
+static void read_input(T* A, const Params p) {
+
+    char  dctFileName[100];
+    FILE *File = NULL;
+
+    // Open input file
+    unsigned short temp;
+    sprintf(dctFileName, p.file_name);
+    if((File = fopen(dctFileName, "rb")) != NULL) {
+        for(unsigned int y = 0; y < p.input_size; y++) {
+            fread(&temp, sizeof(unsigned short), 1, File);
+            A[y] = (unsigned int)ByteSwap16(temp);
+            if(A[y] >= 4096)
+                A[y] = 4095;
+        }
+        fclose(File);
+    } else {
+        printf("%s does not exist\n", dctFileName);
+        exit(1);
+    }
+}
+
+// Compute output in the host
+static void histogram_host(unsigned int* histo, T* A, unsigned int bins, unsigned int nr_elements, int exp, unsigned int nr_of_dpus) {
+    if(!exp){
+        for (unsigned int i = 0; i < nr_of_dpus; i++) {
+            for (unsigned int j = 0; j < nr_elements; j++) {
+                T d = A[j];
+                histo[i * bins + ((d * bins) >> DEPTH)] += 1;
+            }
+        }
+    }
+    else{
+        for (unsigned int j = 0; j < nr_elements; j++) {
+            T d = A[j];
+            histo[(d * bins) >> DEPTH] += 1;
+        }
+    }
+}
+
+// Main of the Host Application
+int main(int argc, char **argv) {
+
+    struct Params p = input_params(argc, argv);
+
+    struct dpu_set_t dpu_set, dpu;
+    uint32_t nr_of_dpus;
+    
+#if ENERGY
+    struct dpu_probe_t probe;
+    DPU_ASSERT(dpu_probe_init("energy_probe", &probe));
+#endif
+
+    // Allocate DPUs and load binary
+    DPU_ASSERT(dpu_alloc(NR_DPUS, NULL, &dpu_set));
+    DPU_ASSERT(dpu_load(dpu_set, DPU_BINARY, NULL));
+    DPU_ASSERT(dpu_get_nr_dpus(dpu_set, &nr_of_dpus));
+    printf("Allocated %d DPU(s)\n", nr_of_dpus);
+
+    unsigned int i = 0;
+    unsigned int input_size; // Size of input image
+    unsigned int dpu_s = p.dpu_s;
+    if(p.exp == 0)
+        input_size = p.input_size * nr_of_dpus; // Size of input image
+    else if(p.exp == 1)
+        input_size = p.input_size; // Size of input image
+	else
+        input_size = p.input_size * dpu_s; // Size of input image
+
+    const unsigned int input_size_8bytes = 
+        ((input_size * sizeof(T)) % 8) != 0 ? roundup(input_size, 8) : input_size; // Input size per DPU (max.), 8-byte aligned
+    const unsigned int input_size_dpu = divceil(input_size, nr_of_dpus); // Input size per DPU (max.)
+    const unsigned int input_size_dpu_8bytes = 
+        ((input_size_dpu * sizeof(T)) % 8) != 0 ? roundup(input_size_dpu, 8) : input_size_dpu; // Input size per DPU (max.), 8-byte aligned
+
+    // Input/output allocation
+    A = malloc(input_size_dpu_8bytes * nr_of_dpus * sizeof(T));
+    T *bufferA = A;
+    histo_host = malloc(p.bins * sizeof(unsigned int));
+    histo = malloc(nr_of_dpus * p.bins * sizeof(unsigned int));
+
+    // Create an input file with arbitrary data
+    read_input(A, p);
+    if(p.exp == 0){
+        for(unsigned int j = 1; j < nr_of_dpus; j++){
+            memcpy(&A[j * input_size_dpu_8bytes], &A[0], input_size_dpu_8bytes * sizeof(T));
+        }
+    }
+    else if(p.exp == 2){
+        for(unsigned int j = 1; j < dpu_s; j++)
+            memcpy(&A[j * p.input_size], &A[0], p.input_size * sizeof(T));
+    }
+
+    // Timer declaration
+    Timer timer;
+
+    printf("NR_TASKLETS\t%d\tBL\t%d\tinput_size\t%u\n", NR_TASKLETS, BL, input_size);
+
+    // Loop over main kernel
+    for(int rep = 0; rep < p.n_warmup + p.n_reps; rep++) {
+        memset(histo_host, 0, p.bins * sizeof(unsigned int));
+        memset(histo, 0, nr_of_dpus * p.bins * sizeof(unsigned int));
+
+        // Compute output on CPU (performance comparison and verification purposes)
+        if(rep >= p.n_warmup)
+            start(&timer, 0, rep - p.n_warmup);
+        histogram_host(histo_host, A, p.bins, p.input_size, 1, nr_of_dpus);
+        if(rep >= p.n_warmup)
+            stop(&timer, 0);
+
+        printf("Load input data\n");
+        if(rep >= p.n_warmup)
+            start(&timer, 1, rep - p.n_warmup);
+        // Input arguments
+        unsigned int kernel = 0;
+        i = 0;
+	    dpu_arguments_t input_arguments[NR_DPUS];
+	    for(i=0; i<nr_of_dpus-1; i++) {
+	        input_arguments[i].size=input_size_dpu_8bytes * sizeof(T); 
+	        input_arguments[i].transfer_size=input_size_dpu_8bytes * sizeof(T); 
+	        input_arguments[i].bins=p.bins;
+	        input_arguments[i].kernel=kernel;
+	    }
+	    input_arguments[nr_of_dpus-1].size=(input_size_8bytes - input_size_dpu_8bytes * (NR_DPUS-1)) * sizeof(T); 
+	    input_arguments[nr_of_dpus-1].transfer_size=input_size_dpu_8bytes * sizeof(T); 
+	    input_arguments[nr_of_dpus-1].bins=p.bins;
+	    input_arguments[nr_of_dpus-1].kernel=kernel;
+
+        // Copy input arrays
+        i = 0;
+        DPU_FOREACH(dpu_set, dpu, i) {
+            DPU_ASSERT(dpu_prepare_xfer(dpu, &input_arguments[i]));
+        }
+        DPU_ASSERT(dpu_push_xfer(dpu_set, DPU_XFER_TO_DPU, "DPU_INPUT_ARGUMENTS", 0, sizeof(input_arguments[0]), DPU_XFER_DEFAULT));
+        DPU_FOREACH(dpu_set, dpu, i) {
+            DPU_ASSERT(dpu_prepare_xfer(dpu, bufferA + input_size_dpu_8bytes * i));
+        }
+        DPU_ASSERT(dpu_push_xfer(dpu_set, DPU_XFER_TO_DPU, DPU_MRAM_HEAP_POINTER_NAME, 0, input_size_dpu_8bytes * sizeof(T), DPU_XFER_DEFAULT));
+        if(rep >= p.n_warmup)
+            stop(&timer, 1);
+
+        printf("Run program on DPU(s) \n");
+        // Run DPU kernel
+        if(rep >= p.n_warmup) {
+            start(&timer, 2, rep - p.n_warmup);
+            #if ENERGY
+            DPU_ASSERT(dpu_probe_start(&probe));
+            #endif
+        }
+        DPU_ASSERT(dpu_launch(dpu_set, DPU_SYNCHRONOUS));
+        if(rep >= p.n_warmup) {
+            stop(&timer, 2);
+            #if ENERGY
+            DPU_ASSERT(dpu_probe_stop(&probe));
+            #endif
+        }
+
+#if PRINT
+        {
+            unsigned int each_dpu = 0;
+            printf("Display DPU Logs\n");
+            DPU_FOREACH (dpu_set, dpu) {
+                printf("DPU#%d:\n", each_dpu);
+                DPU_ASSERT(dpulog_read_for_dpu(dpu.dpu, stdout));
+                each_dpu++;
+            }
+        }
+#endif
+
+        printf("Retrieve results\n");
+        i = 0;
+        if(rep >= p.n_warmup)
+            start(&timer, 3, rep - p.n_warmup);
+        // PARALLEL RETRIEVE TRANSFER
+        DPU_FOREACH(dpu_set, dpu, i) {
+            DPU_ASSERT(dpu_prepare_xfer(dpu, histo + p.bins * i));
+        }
+        DPU_ASSERT(dpu_push_xfer(dpu_set, DPU_XFER_FROM_DPU, DPU_MRAM_HEAP_POINTER_NAME, input_size_dpu_8bytes * sizeof(T), p.bins * sizeof(unsigned int), DPU_XFER_DEFAULT));
+		
+        // Final histogram merging
+        for(i = 1; i < nr_of_dpus; i++){
+            for(unsigned int j = 0; j < p.bins; j++){
+                histo[j] += histo[j + i * p.bins];
+            }			
+        }		
+        if(rep >= p.n_warmup)
+            stop(&timer, 3);
+
+    }
+
+    // Print timing results
+    printf("CPU ");
+    print(&timer, 0, p.n_reps);
+    printf("CPU-DPU ");
+    print(&timer, 1, p.n_reps);
+    printf("DPU Kernel ");
+    print(&timer, 2, p.n_reps);
+    printf("DPU-CPU ");
+    print(&timer, 3, p.n_reps);
+
+    #if ENERGY
+    double energy;
+    DPU_ASSERT(dpu_probe_get(&probe, DPU_ENERGY, DPU_AVERAGE, &energy));
+    printf("DPU Energy (J): %f\t", energy);
+    #endif	
+
+
+    // Check output
+    bool status = true;
+    if(p.exp == 1) 
+        for (unsigned int j = 0; j < p.bins; j++) {
+            if(histo_host[j] != histo[j]){ 
+                status = false;
+#if PRINT
+                printf("%u - %u: %u -- %u\n", j, j, histo_host[j], histo[j]);
+#endif
+            }
+        }
+    else if(p.exp == 2) 
+        for (unsigned int j = 0; j < p.bins; j++) {
+            if(dpu_s * histo_host[j] != histo[j]){ 
+                status = false;
+#if PRINT
+                printf("%u - %u: %u -- %u\n", j, j, dpu_s * histo_host[j], histo[j]);
+#endif
+            }
+        }
+    else
+        for (unsigned int j = 0; j < p.bins; j++) {
+            if(nr_of_dpus * histo_host[j] != histo[j]){ 
+                status = false;
+#if PRINT
+                printf("%u - %u: %u -- %u\n", j, j, nr_of_dpus * histo_host[j], histo[j]);
+#endif
+            }
+        }
+    if (status) {
+        printf("[" ANSI_COLOR_GREEN "OK" ANSI_COLOR_RESET "] Outputs are equal\n");
+    } else {
+        printf("[" ANSI_COLOR_RED "ERROR" ANSI_COLOR_RESET "] Outputs differ!\n");
+    }
+
+    // Deallocation
+    free(A);
+    free(histo_host);
+    free(histo);
+    DPU_ASSERT(dpu_free(dpu_set));
+	
+    return status ? 0 : -1;
+}
diff --git a/HST-L/input/image_VanHateren.iml b/HST-L/input/image_VanHateren.iml
new file mode 100644
index 0000000..1ae6047
--- /dev/null
+++ b/HST-L/input/image_VanHateren.iml
diff --git a/HST-L/run.sh b/HST-L/run.sh
new file mode 100755
index 0000000..d2a072f
--- /dev/null
+++ b/HST-L/run.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+for i in 1 
+do
+	for b in 64 128 256 512 1024 2048 4096
+	do
+    	for k in 1 2 4 8 16
+	    do
+	        NR_DPUS=$i NR_TASKLETS=$k BL=10 make all
+		    wait
+            ./bin/host_code -w 2 -e 5 -b ${b} > profile/HSTL_${b}_tl${k}_dpu${i}.txt
+		    wait
+		    make clean
+		    wait
+		done
+	done
+done
diff --git a/HST-L/support/common.h b/HST-L/support/common.h
new file mode 100755
index 0000000..30df40d
--- /dev/null
+++ b/HST-L/support/common.h
@@ -0,0 +1,45 @@
+#ifndef _COMMON_H_
+#define _COMMON_H_
+
+// Transfer size between MRAM and WRAM
+#ifdef BL
+#define BLOCK_SIZE_LOG2 BL
+#define BLOCK_SIZE (1 << BLOCK_SIZE_LOG2)
+#else
+#define BLOCK_SIZE_LOG2 8
+#define BLOCK_SIZE (1 << BLOCK_SIZE_LOG2)
+#define BL BLOCK_SIZE_LOG2
+#endif
+
+// Data type
+#define T uint32_t
+#define DIV 2 // Shift right to divide by sizeof(T)
+#define REGS (BLOCK_SIZE >> 2) // 32 bits
+
+// Pixel depth
+#define DEPTH 12
+#define ByteSwap16(n) (((((unsigned int)n) << 8) & 0xFF00) | ((((unsigned int)n) >> 8) & 0x00FF))
+
+// Structures used by both the host and the dpu to communicate information 
+typedef struct {
+    uint32_t size;
+    uint32_t transfer_size;
+    uint32_t bins;
+	enum kernels {
+	    kernel1 = 0,
+	    nr_kernels = 1,
+	} kernel;
+} dpu_arguments_t;
+
+#ifndef ENERGY
+#define ENERGY 0
+#endif
+#define PRINT 0 
+
+#define ANSI_COLOR_RED     "\x1b[31m"
+#define ANSI_COLOR_GREEN   "\x1b[32m"
+#define ANSI_COLOR_RESET   "\x1b[0m"
+
+#define divceil(n, m) (((n)-1) / (m) + 1)
+#define roundup(n, m) ((n / m) * m + m)
+#endif
diff --git a/HST-L/support/params.h b/HST-L/support/params.h
new file mode 100644
index 0000000..e29449b
--- /dev/null
+++ b/HST-L/support/params.h
@@ -0,0 +1,67 @@
+#ifndef _PARAMS_H_
+#define _PARAMS_H_
+
+#include "common.h"
+
+typedef struct Params {
+    unsigned int   input_size;
+    unsigned int   bins;
+    int   n_warmup;
+    int   n_reps;
+    const char *file_name;
+    int  exp;
+    int  dpu_s;
+}Params;
+
+static void usage() {
+    fprintf(stderr,
+        "\nUsage:  ./program [options]"
+        "\n"
+        "\nGeneral options:"
+        "\n    -h        help"
+        "\n    -w <W>    # of untimed warmup iterations (default=1)"
+        "\n    -e <E>    # of timed repetition iterations (default=3)"
+        "\n    -x <X>    Weak (0) or strong (1, 2) scaling (default=0)"
+        "\n"
+        "\nBenchmark-specific options:"
+        "\n    -i <I>    input size (default=1536*1024 elements)"
+        "\n    -b <B>    histogram size (default=256 bins)"
+        "\n    -f <F>    input image file (default=../input/image_VanHateren.iml)"
+        "\n");
+}
+
+struct Params input_params(int argc, char **argv) {
+    struct Params p;
+    p.input_size    = 1536 * 1024;
+    p.bins          = 256;
+    p.n_warmup      = 1;
+    p.n_reps        = 3;
+    p.exp           = 0;
+    p.file_name     = "./input/image_VanHateren.iml";
+    p.dpu_s         = 64;
+
+    int opt;
+    while((opt = getopt(argc, argv, "hi:b:w:e:f:x:z:")) >= 0) {
+        switch(opt) {
+        case 'h':
+        usage();
+        exit(0);
+        break;
+        case 'i': p.input_size    = atoi(optarg); break;
+        case 'b': p.bins          = atoi(optarg); break;
+        case 'w': p.n_warmup      = atoi(optarg); break;
+        case 'e': p.n_reps        = atoi(optarg); break;
+        case 'f': p.file_name     = optarg; break;
+        case 'x': p.exp           = atoi(optarg); break;
+        case 'z': p.dpu_s         = atoi(optarg); break;
+        default:
+            fprintf(stderr, "\nUnrecognized option!\n");
+            usage();
+            exit(0);
+        }
+    }
+    assert(NR_DPUS > 0 && "Invalid # of dpus!");
+
+    return p;
+}
+#endif
diff --git a/HST-L/support/timer.h b/HST-L/support/timer.h
new file mode 100755
index 0000000..eedc385
--- /dev/null
+++ b/HST-L/support/timer.h
@@ -0,0 +1,59 @@
+/*

+ * Copyright (c) 2016 University of Cordoba and University of Illinois

+ * All rights reserved.

+ *

+ * Developed by:    IMPACT Research Group

+ *                  University of Cordoba and University of Illinois

+ *                  http://impact.crhc.illinois.edu/

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a copy

+ * of this software and associated documentation files (the "Software"), to deal

+ * with the Software without restriction, including without limitation the 

+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

+ * sell copies of the Software, and to permit persons to whom the Software is

+ * furnished to do so, subject to the following conditions:

+ *

+ *      > Redistributions of source code must retain the above copyright notice,

+ *        this list of conditions and the following disclaimers.

+ *      > Redistributions in binary form must reproduce the above copyright

+ *        notice, this list of conditions and the following disclaimers in the

+ *        documentation and/or other materials provided with the distribution.

+ *      > Neither the names of IMPACT Research Group, University of Cordoba, 

+ *        University of Illinois nor the names of its contributors may be used 

+ *        to endorse or promote products derived from this Software without 

+ *        specific prior written permission.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 

+ * CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH

+ * THE SOFTWARE.

+ *

+ */

+

+#include <sys/time.h>

+

+typedef struct Timer{

+

+    struct timeval startTime[4];

+    struct timeval stopTime[4];

+    double         time[4];

+

+}Timer;

+

+void start(Timer *timer, int i, int rep) {

+    if(rep == 0) {

+        timer->time[i] = 0.0;

+    }

+    gettimeofday(&timer->startTime[i], NULL);

+}

+

+void stop(Timer *timer, int i) {

+    gettimeofday(&timer->stopTime[i], NULL);

+    timer->time[i] += (timer->stopTime[i].tv_sec - timer->startTime[i].tv_sec) * 1000000.0 +

+                      (timer->stopTime[i].tv_usec - timer->startTime[i].tv_usec);

+}

+

+void print(Timer *timer, int i, int REP) { printf("Time (ms): %f\t", timer->time[i] / (1000 * REP)); }