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/**
* Copyright 2019 Sims Hill Osborne and Joshua Bakita
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in 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:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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
* AUTHORS 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 IN THE
* SOFTWARE.
**/
#include <fcntl.h>
#include <limits.h>
#include <semaphore.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
// Benchmarks use SET_UP, START_LOOP, STOP_LOOP, and WRITE_TO_FILE
// These are macros so that we can declare and maintain additional state inside
// the benchmark.
#define SET_UP if (argc < 8) {\
printf("Usage: %s <name> <runs> <my core> <other core> <other program> <runID> <lockID>", argv[0]);\
exit(1);\
}\
char * thisProgram = argv[1];\
int maxJobs = atoi(argv[2]);\
char * thisCore = argv[3];\
char * otherCore = argv[4];\
char * otherProgram = argv[5];\
char * runID = argv[6];\
int lockID = atoi(argv[7]);\
struct timespec start, end;\
int jobsComplete;\
long * startS = malloc(sizeof(long) *maxJobs);\
long * startN = malloc(sizeof(long) *maxJobs);\
long * endS = malloc(sizeof(long) *maxJobs);\
long * endN = malloc(sizeof(long) *maxJobs);\
char * bigArray;\
char fileName[strlen(runID) + 5];\
strcpy(fileName, runID);\
strcat(fileName, ".txt");\
mlockall(MCL_CURRENT || MCL_FUTURE);\
sem_t *firstSem=sem_open("/firstTacleSem", O_CREAT, 644, 0);\
if (firstSem == SEM_FAILED) {\
perror("Error opening/creating first semaphore");\
exit(1);\
}\
sem_t *secondSem=sem_open("/secondTacleSem", O_CREAT, 644, 0);\
if (secondSem == SEM_FAILED) {\
perror("Error opening/creating second semaphore");\
exit(1);\
}\
int barrier_file = shm_open("/TacleBarrier", O_CREAT | O_RDWR, 644);\
if (barrier_file == -1) {\
perror("Error creating shared memory");\
exit(1);\
}\
/* This sets our shared file to be one byte of '\0'*/ \
if (ftruncate(barrier_file, 1) == -1) {\
perror("Error setting size of shared memory");\
exit(1);\
}\
char * barrier = mmap(NULL, 1, PROT_WRITE, MAP_SHARED, barrier_file, 0);\
if (barrier == MAP_FAILED) {\
perror("Error mapping shared memory");\
exit(1);\
}\
int error;\
int val;
#define SAVE_RESULTS if (jobsComplete > -1){\
startS[jobsComplete]=start.tv_sec;\
startN[jobsComplete]=start.tv_nsec;\
endS[jobsComplete]=end.tv_sec;\
endN[jobsComplete]=end.tv_nsec;}
#define WRITE_TO_FILE {\
munlockall();\
FILE *fp = fopen(fileName, "a");\
if (fp == NULL) {\
perror("Error opening file. \n");\
exit(1);\
}\
for(jobsComplete=0; jobsComplete<maxJobs; jobsComplete++){\
fprintf(fp, "%s %s %s %s %d %ld %ld %ld %ld %s %d \n",\
thisProgram, otherProgram, thisCore, otherCore, maxJobs,\
startS[jobsComplete], startN[jobsComplete], endS[jobsComplete], endN[jobsComplete],\
runID, jobsComplete);\
}\
fclose(fp);\
/* Clean up the barrier synchronization shared memory */\
munmap(barrier, 1);\
shm_unlink("/TacleBarrier");\
free(startS);\
free(startN);\
free(endS);\
free(endN);\
}
// Call the wbinvld instruction (it's in a kernel module due to it being ring-0)
#define FLUSH_CACHES FILE *fp = fopen("/proc/wbinvd", "r");\
if (fp == NULL) {\
perror("Cache flush module interface cannot be opened");\
exit(1);\
}\
char dummy;\
if (fread(&dummy, 1, 1, fp) == 0) {\
perror("Unable to access cache flush module interface");\
exit(1);\
}\
fclose(fp);
// These timers should just be aliases to the hardware counters w/ some small adjustments
#define START_TIMER clock_gettime(CLOCK_MONOTONIC, &start);
#define STOP_TIMER clock_gettime(CLOCK_MONOTONIC, &end);
//check value of sem
//if sem=0, unlock
//if sem=1, spin
#define SLEEP nanosleep((const struct timespec[]){{0, 1000000}}, NULL);
#define FIRST_UNLOCK if (lockID == 1) {\
if (sem_post(secondSem) != 0) {\
perror("Unable to unlock second semaphore");\
exit(1);\
}\
} \
else {\
if (sem_post(firstSem) != 0) {\
perror("Unable to unlock first semaphore");\
exit(1);\
}\
} \
#define FIRST_LOCK if (lockID == 1) {\
if (sem_wait(firstSem) != 0) {\
perror("Unable to wait on first semaphore");\
exit(1);\
}\
}\
else {\
if (sem_wait(secondSem) != 0) {\
perror("Unable to wait on second semaphore");\
exit(1);\
}\
}
#define SECOND_UNLOCK if (lockID==1){sem_post(fourthSem) ; }\
else {sem_post(thirdSem) ; }
#define SECOND_LOCK if (lockID==1){sem_wait(thirdSem); }\
else {sem_wait(fourthSem); }
#define BARRIER_SYNC if (__sync_bool_compare_and_swap(barrier, 0, 1)) {\
while (!__sync_bool_compare_and_swap(barrier, 0, 0)) {};\
}\
else {\
__sync_bool_compare_and_swap(barrier, 1, 0);\
}
#define START_LOOP FIRST_UNLOCK FIRST_LOCK FLUSH_CACHES BARRIER_SYNC START_TIMER
#define STOP_LOOP STOP_TIMER SAVE_RESULTS
/*
Intended structure
main
SET_UP
notice that STOP LOOP negates the ++ if outout=0
for (jobsComplete=-1; jobsComplete<maxJobs; jobsComplete++){
START_LOOP
tacleInit();
tacleMain();
STOP_LOOP
}
WRITE_TO_FILE
tacleReturn
*/
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