diff options
Diffstat (limited to 'apps')
| -rw-r--r-- | apps/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | apps/xilinx.c | 84 |
2 files changed, 77 insertions, 9 deletions
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt index 14794b1..2f882a3 100644 --- a/apps/CMakeLists.txt +++ b/apps/CMakeLists.txt @@ -5,4 +5,4 @@ include_directories( link_directories(${UFODECODE_LIBRARY_DIRS}) add_executable(xilinx xilinx.c) -target_link_libraries(xilinx pcilib) +target_link_libraries(xilinx pcilib rt) diff --git a/apps/xilinx.c b/apps/xilinx.c index 1312663..1ec31d7 100644 --- a/apps/xilinx.c +++ b/apps/xilinx.c @@ -1,8 +1,11 @@ #define _BSD_SOURCE +#define _POSIX_C_SOURCE 199309L #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <stdarg.h> +#include <time.h> +#include <sched.h> #include <sys/time.h> #include "pcilib.h" @@ -14,9 +17,17 @@ #define USE PCILIB_KMEM_USE(PCILIB_KMEM_USE_USER, 1) #define BUFFERS 16 #define ITERATIONS 16384 -#define PAGE_SIZE 4096 +#define PAGE_SIZE 4096 // other values are not supported in the kernel #define TIMEOUT 100000 +/* IRQs are slow for some reason. REALTIME mode is slower. Adding delays does not really help, +otherall we have only 3 checks in average. Check ready seems to be not needed and adds quite +much extra time */ +//#define USE_IRQ +//#define CHECK_READY +//#define REALTIME +//#define ADD_DELAYS + //#define WR(addr, value) { val = value; pcilib_write(pci, BAR, addr, sizeof(val), &val); } //#define RD(addr, value) { pcilib_read(pci, BAR, addr, sizeof(val), &val); value = val; } #define WR(addr, value) { *(uint32_t*)(bar + addr) = value; } @@ -33,6 +44,23 @@ static void fail(const char *msg, ...) { exit(-1); } +void hpsleep(size_t ns) { + struct timespec wait, tv; + + clock_gettime(CLOCK_REALTIME, &wait); + + wait.tv_nsec += ns; + if (wait.tv_nsec > 999999999) { + wait.tv_sec += 1; + wait.tv_nsec = 1000000000 - wait.tv_nsec; + } + + do { + clock_gettime(CLOCK_REALTIME, &tv); + } while ((wait.tv_sec > tv.tv_sec)||((wait.tv_sec == tv.tv_sec)&&(wait.tv_nsec > tv.tv_nsec))); +} + + int main() { int err; int i, j; @@ -42,9 +70,25 @@ int main() { struct timeval start, end; size_t size, run_time; void* volatile bar; + uintptr_t bus_addr[BUFFERS]; pcilib_kmem_flags_t clean_flags = PCILIB_KMEM_FLAG_HARDWARE|PCILIB_KMEM_FLAG_PERSISTENT|PCILIB_KMEM_FLAG_EXCLUSIVE; +#ifdef ADD_DELAYS + long rpt = 0, rpt2 = 0; + size_t best_time; + best_time = 1000000000L * PAGE_SIZE / (4L * 1024 * 1024 * 1024); +#endif /* ADD_DELAYS */ + +#ifdef REALTIME + pid_t pid; + struct sched_param sched = {0}; + + pid = getpid(); + sched.sched_priority = sched_get_priority_min(SCHED_FIFO); + if (sched_setscheduler(pid, SCHED_FIFO, &sched)) + printf("Warning: not able to get real-time priority\n"); +#endif /* REALTIME */ pci = pcilib_open(DEVICE, PCILIB_MODEL_DETECT); if (!pci) fail("pcilib_open"); @@ -70,30 +114,50 @@ int main() { WR(0x04, 0) WR(0x0C, 0x20) - WR(0x10, 0x20) + WR(0x10, (PAGE_SIZE / 0x80)) WR(0x14, 0x13131313) + for (j = 0; j < BUFFERS; j++ ) { + bus_addr[j] = pcilib_kmem_get_block_ba(pci, kbuf, j); + } gettimeofday(&start, NULL); + for (i = 0; i < ITERATIONS; i++) { for (j = 0; j < BUFFERS; j++ ) { - uintptr_t ba = pcilib_kmem_get_block_ba(pci, kbuf, j); - WR(0x08, ba) - +// uintptr_t ba = pcilib_kmem_get_block_ba(pci, kbuf, j); +// WR(0x08, ba) + WR(0x08, bus_addr[j]); WR(0x04, 0x01) +#ifdef USE_IRQ err = pcilib_wait_irq(pci, PCILIB_IRQ_SOURCE_DEFAULT, TIMEOUT, NULL); if (err) printf("Timeout waiting for IRQ, err: %i\n", err); - + RD(0x04, status); if ((status&0xFFFF) != 0x101) printf("Invalid status %x\n", status); // WR(0x04, 0x00); +#else /* USE_IRQ */ +# ifdef ADD_DELAYS +// hpsleep(best_time); + do { + rpt++; + RD(0x04, status); + } while (status != 0x101); +# else /* ADD_DELAYS */ + do { + RD(0x04, status); + } while (status != 0x101); +# endif /* ADD_DELAYS */ +#endif /* USE_IRQ */ WR(0x00, 1) +#ifdef CHECK_READY do { + rpt2++; RD(0x04, status); } while (status != 0); -// usleep(1); +#endif /* CHECK_READY */ WR(0x00, 0) } } @@ -105,7 +169,11 @@ int main() { pcilib_close(pci); run_time = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_usec - start.tv_usec); - size = ITERATIONS * BUFFERS * PAGE_SIZE; + size = (long long int)ITERATIONS * BUFFERS * PAGE_SIZE; printf("%.3lf GB/s: transfered %zu bytes in %zu us using %u buffers\n", 1000000. * size / run_time / 1024 / 1024 / 1024, size, run_time, BUFFERS); + +# ifdef ADD_DELAYS + printf("Repeats: %lf, %lf\n",1. * rpt / (ITERATIONS * BUFFERS), 1. * rpt2 / (ITERATIONS * BUFFERS)); +#endif /* USE_IRQ */ } |