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fix time handling

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- add implementation for RCCE_wtime
- use system call to determine the clock frequency
This commit is contained in:
Stefan Lankes 2015-10-18 10:52:59 +02:00
parent 30b3166155
commit 5effe82dd4
1 changed files with 25 additions and 4 deletions
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29
hermit/usr/ircce/RCCE_admin.c
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@ -45,6 +45,7 @@
#else
#define RCCE_SESSION_ID 42
#include "syscall.h"
extern unsigned int get_cpufreq();
#endif
#endif
#include <sys/types.h>
@ -190,7 +191,15 @@ t_vcharp RCCE_fool_write_combine_buffer;
//......................................................................................
#ifdef SCC
#ifndef __INTEL_COMPILER
#ifdef __hermit__
inline volatile uint64_t _rdtsc() {
uint64_t lo, hi;
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi) );
return ((uint64_t)hi << 32ULL | (uint64_t)lo);
}
#elif defined(__INTEL_COMPILER)
inline volatile long long _rdtsc() {
register long long TSC __asm__("eax");
__asm__ volatile (".byte 15, 49" : : : "eax", "edx");
@ -248,7 +257,14 @@ int RC_COMM_BUFFER_SIZE() {
//--------------------------------------------------------------------------------------
t_vcharp RC_COMM_BUFFER_START(int ue){
#ifdef __hermit__
return (t_vcharp) SYSCALL2(__NR_rcce_malloc, RCCE_SESSION_ID, ue);
t_vcharp retval;
retval = (t_vcharp) SYSCALL2(__NR_rcce_malloc, RCCE_SESSION_ID, ue);
if (!retval) {
fprintf(stderr, "rcce_malloc failed\n");
RCCE_finalize();
exit(1);
}
return retval;
#elif defined(SCC)
// "Allocate" MPB, using memory mapping of physical addresses
t_vcharp retval;
@ -878,7 +894,14 @@ int RCCE_init(
#endif
RCCE_NP = atoi(*(++(*argv)));
#ifdef __hermit__
// HermitCore ignores the third argument and uses
// its own clock value
RC_REFCLOCKGHZ = (double) get_cpufreq() / 1000.0;
++(*argv);
#else
RC_REFCLOCKGHZ = atof(*(++(*argv)));
#endif
// put the participating core ids (unsorted) into an array
for (ue=0; ue<RCCE_NP; ue++) {
@ -1200,8 +1223,6 @@ int RCCE_finalize(void){
double RCCE_wtime(void) {
#ifdef SCC
return ( ((double)_rdtsc())/(RC_REFCLOCKGHZ*1.e9));
#elif defined(__hermit__)
#warning TODO
#else
return (omp_get_wtime());
#endif