275 lines
9.9 KiB
C
275 lines
9.9 KiB
C
/************************************************************************
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** **
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** The YapTab/YapOr/OPTYap systems **
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** **
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** YapTab extends the Yap Prolog engine to support sequential tabling **
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** YapOr extends the Yap Prolog engine to support or-parallelism **
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** OPTYap extends the Yap Prolog engine to support or-parallel tabling **
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** **
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** **
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** Yap Prolog was developed at University of Porto, Portugal **
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** **
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************************************************************************/
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/**************************************
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** Includes & Declarations **
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**************************************/
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#include "Yap.h"
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#if defined(YAPOR_COPY) || defined(YAPOR_COW) || defined(YAPOR_SBA)
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/shm.h>
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#include <sys/mman.h>
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#include "Yatom.h"
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#include "YapHeap.h"
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#include "alloc.h"
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#include "heapgc.h"
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#include "or.macros.h"
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/************************************
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** Macros & Declarations **
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************************************/
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#define KBYTES 1024
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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int fd_mapfile;
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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int shm_mapid[MAX_WORKERS + 1];
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#endif /* MEMORY_MAPPING_SCHEME */
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/******************************************
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** Local functions declaration **
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******************************************/
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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void open_mapfile(long TotalArea);
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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void shm_map_memory(int id, int size, void *shmaddr);
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#endif /* MEMORY_MAPPING_SCHEME */
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/********************************
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** Global functions **
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********************************/
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void Yap_init_optyap_memory(long TrailAuxArea, long HeapArea, long GlobalLocalArea, int n_workers) {
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#ifdef YAPOR_COW
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int private_fd_mapfile;
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#if MMAP_MEMORY_MAPPING_SCHEME
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long TotalArea;
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#endif /* MMAP_MEMORY_MAPPING_SCHEME */
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#else /* YAPOR_COPY || YAPOR_SBA */
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long TotalArea;
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#endif
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long ExtraArea;
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HeapArea = ADJUST_SIZE_TO_PAGE(HeapArea);
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GlobalLocalArea = ADJUST_SIZE(GlobalLocalArea);
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TrailAuxArea = ADJUST_SIZE(TrailAuxArea);
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/* initial allocation - model independent */
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ExtraArea = ADJUST_SIZE_TO_PAGE(sizeof(struct global_data) + MAX_WORKERS * sizeof(struct worker_local));
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Yap_local = (struct worker_local *)(MMAP_ADDR - ExtraArea);
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Yap_global = (struct global_data *)(MMAP_ADDR - sizeof(struct global_data));
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Yap_HeapBase = (ADDR) MMAP_ADDR;
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Yap_GlobalBase = (ADDR) (MMAP_ADDR + HeapArea);
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/* shared memory allocation - model dependent */
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#ifdef YAPOR_COW
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/* acow just needs one stack */
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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/* I need this for MMAP to know what it must allocate */
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TotalArea = HeapArea;
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#endif /* MMAP_MEMORY_MAPPING_SCHEME */
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#else /* YAPOR_COPY || YAPOR_SBA */
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/* the others need n stacks */
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Yap_worker_area_size = ADJUST_SIZE_TO_PAGE(GlobalLocalArea + TrailAuxArea);
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TotalArea = ExtraArea + HeapArea + Yap_worker_area_size * n_workers;
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#endif
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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/* map total area in a single go */
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open_mapfile(TotalArea);
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if (mmap((void *) Yap_local, (size_t) TotalArea, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd_mapfile, 0) == (void *) -1)
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Yap_Error(FATAL_ERROR, TermNil, "mmap error (Yap_init_optyap_memory)");
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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/* most systems are limited regarding what we can allocate */
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#ifdef YAPOR_COW
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/* single shared segment in ACOW */
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shm_map_memory(0, ExtraArea + HeapArea, (void *) MMAP_ADDR);
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#else /* YAPOR_COPY || YAPOR_SBA */
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/* place as segment n otherwise (0..n-1 reserved for worker areas */
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shm_map_memory(n_workers, ExtraArea + HeapArea, (void *) Yap_local);
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{ int i;
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for (i = 0; i < n_workers; i++)
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shm_map_memory(i, Yap_worker_area_size, Yap_GlobalBase + Yap_worker_area_size * i);
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}
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#endif
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#endif /* MEMORY_MAPPING_SCHEME */
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#ifdef YAPOR_COW
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/* just allocate local space for stacks */
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if ((private_fd_mapfile = open("/dev/zero", O_RDWR)) < 0)
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Yap_Error(FATAL_ERROR, TermNil, "open error (Yap_init_optyap_memory)");
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if (mmap(Yap_GlobalBase, GlobalLocalArea + TrailAuxArea, PROT_READ|PROT_WRITE,
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MAP_PRIVATE|MAP_FIXED, private_fd_mapfile, 0) == (void *) -1)
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Yap_Error(FATAL_ERROR, TermNil, "mmap error (Yap_init_optyap_memory)");
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close(private_fd_mapfile);
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#endif /* YAPOR_COW */
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#ifdef YAPOR_SBA
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/* alloc space for the sparse binding array */
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sba_size = Yap_worker_area_size * n_workers;
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if ((binding_array = (char *)malloc(sba_size)) == NULL)
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Yap_Error(FATAL_ERROR, TermNil, "malloc error (Yap_init_optyap_memory)");
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if ((CELL)binding_array & MBIT) {
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Yap_Error(INTERNAL_ERROR, TermNil, "binding_array start address conflicts with tag used in IDB (Yap_init_optyap_memory)");
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}
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sba_offset = binding_array - Yap_GlobalBase;
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sba_end = (int)binding_array + sba_size;
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#endif /* YAPOR_SBA */
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Yap_TrailBase = Yap_GlobalBase + GlobalLocalArea;
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Yap_LocalBase = Yap_TrailBase - CellSize;
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if (TrailAuxArea > 262144) /* 262144 = 256 * 1024 */
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Yap_TrailTop = Yap_TrailBase + (TrailAuxArea - 131072); /* 131072 = 262144 / 2 */
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else
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Yap_TrailTop = Yap_TrailBase + (TrailAuxArea / 2);
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HeapMax = (CELL)(Yap_TrailBase + (TrailAuxArea - CellSize));
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Yap_InitHeap(Yap_HeapBase);
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}
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void Yap_remap_optyap_memory(void) {
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#ifdef YAPOR_SBA
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/* setup workers so that they have different areas */
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Yap_GlobalBase += worker_id * Yap_worker_area_size;
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Yap_TrailBase += worker_id * Yap_worker_area_size;
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Yap_LocalBase += worker_id * Yap_worker_area_size;
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Yap_TrailTop += worker_id * Yap_worker_area_size;
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#endif /* YAPOR_SBA */
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#ifdef YAPOR_COPY
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int i;
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void *remap_addr = Yap_GlobalBase;
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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long remap_offset = (ADDR) remap_addr - (ADDR) Yap_local;
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if (munmap(remap_addr, (size_t)(Yap_worker_area_size * GLOBAL_number_workers)) == -1)
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Yap_Error(FATAL_ERROR, TermNil, "munmap error (Yap_remap_optyap_memory)");
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for (i = 0; i < GLOBAL_number_workers; i++)
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if (mmap(remap_addr + worker_offset(i), (size_t)Yap_worker_area_size, PROT_READ|PROT_WRITE,
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MAP_SHARED|MAP_FIXED, fd_mapfile, remap_offset + i * Yap_worker_area_size) == (void *) -1)
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Yap_Error(FATAL_ERROR, TermNil, "mmap error (Yap_remap_optyap_memory)");
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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for (i = 0; i < GLOBAL_number_workers; i++)
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if (shmdt(remap_addr + Yap_worker_area_size * i) == -1)
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Yap_Error(FATAL_ERROR, TermNil, "shmdt error (Yap_remap_optyap_memory)");
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for (i = 0; i < GLOBAL_number_workers; i++)
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if(shmat(shm_mapid[i], remap_addr + worker_offset(i), 0) == (void *) -1)
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Yap_Error(FATAL_ERROR, TermNil, "shmat error (Yap_remap_optyap_memory)");
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#endif /* MEMORY_MAPPING_SCHEME */
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#endif /* YAPOR_COPY */
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}
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void Yap_unmap_optyap_memory (void) {
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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char MapFile[20];
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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int i;
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#endif /* MEMORY_MAPPING_SCHEME */
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int proc;
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INFORMATION_MESSAGE("Worker %d exiting...", worker_id);
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for (proc = 0; proc < GLOBAL_number_workers; proc++) {
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if (proc != worker_id && GLOBAL_worker_pid(proc) != 0) {
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if (kill(GLOBAL_worker_pid(proc), SIGKILL) != 0)
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INFORMATION_MESSAGE("Can't kill process %d", GLOBAL_worker_pid(proc));
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else
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INFORMATION_MESSAGE("Killing process %d", GLOBAL_worker_pid(proc));
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}
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}
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#ifdef YAPOR_COW
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if (GLOBAL_number_workers > 1) {
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if (kill(GLOBAL_master_worker, SIGINT) != 0)
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INFORMATION_MESSAGE("Can't kill process %d", GLOBAL_master_worker);
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else
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INFORMATION_MESSAGE("Killing process %d", GLOBAL_master_worker);
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}
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#endif /* YAPOR_COW */
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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strcpy(MapFile,"./mapfile");
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#ifdef YAPOR_COW
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itos(GLOBAL_master_worker, &MapFile[9]);
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#else /* YAPOR_COPY || YAPOR_SBA */
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itos(GLOBAL_worker_pid(0), &MapFile[9]);
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#endif
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if (remove(MapFile) == 0)
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INFORMATION_MESSAGE("Removing mapfile \"%s\"", MapFile);
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else
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INFORMATION_MESSAGE("Can't remove mapfile \"%s\"", MapFile);
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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#ifdef YAPOR_COW
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i = 0;
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#else /* YAPOR_COPY || YAPOR_SBA */
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for (i = 0; i < GLOBAL_number_workers + 1; i++)
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#endif
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{
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if (shmctl(shm_mapid[i], IPC_RMID, 0) == 0)
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INFORMATION_MESSAGE("Removing shared memory segment %d", shm_mapid[i]);
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else
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INFORMATION_MESSAGE("Can't remove shared memory segment %d", shm_mapid[i]);
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}
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#endif /* MEMORY_MAPPING_SCHEME */
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return;
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}
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/* ------------------------- **
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** Local functions **
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** ------------------------- */
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#ifdef MMAP_MEMORY_MAPPING_SCHEME
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void open_mapfile(long TotalArea) {
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char mapfile[20];
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strcpy(mapfile,"./mapfile");
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itos(getpid(), &mapfile[9]);
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if ((fd_mapfile = open(mapfile, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
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Yap_Error(FATAL_ERROR, TermNil, "open error (open_mapfile)");
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if (lseek(fd_mapfile, TotalArea, SEEK_SET) < 0)
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Yap_Error(FATAL_ERROR, TermNil, "lseek error (open_mapfile)");
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if (write(fd_mapfile, "", 1) < 0)
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Yap_Error(FATAL_ERROR, TermNil, "write error (open_mapfile)");
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return;
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}
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#else /* SHM_MEMORY_MAPPING_SCHEME */
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void shm_map_memory(int id, int size, void *shmaddr) {
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if (size > SHMMAX)
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Yap_Error(FATAL_ERROR, TermNil, "maximum size for a shm segment exceeded (shm_map_memory)");
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if ((shm_mapid[id] = shmget(IPC_PRIVATE, size, SHM_R|SHM_W)) == -1)
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Yap_Error(FATAL_ERROR, TermNil, "shmget error (shm_map_memory)");
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if (shmat(shm_mapid[id], shmaddr, 0) == (void *) -1)
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Yap_Error(FATAL_ERROR, TermNil, "shmat error (shm_map_memory)");
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return;
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}
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#endif /* MMAP_MEMORY_MAPPING_SCHEME */
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#endif /* YAPOR_COPY || YAPOR_COW || YAPOR_SBA */
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