a5fcc91656
* Mapping attached part of segment is done at attach time instead of
make time to work with runtimes (e.g. OpenMPI) xpmem_make-ing the
entire user-space
* Mapping attached part of segment at attach time can be turned off by
specifying xpmem_remote_on_demand in kernel argument
* Mapping attachment chooses appropriate page-sizes, i.e., largest
allowed by memory range and segment page boundary
Fixes: a8696d8 "xpmem: Support large page attachment"
Change-Id: I44663865204036520e5f62fe22b9134ee4629f9b
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#include <unistd.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <xpmem.h>
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#include <libgen.h>
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#include "util.h"
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#include "okng.h"
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int main(int argc, char **argv)
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{
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void *mem, *attach;
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int ret;
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int status;
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pid_t pid;
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xpmem_segid_t segid;
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xpmem_apid_t apid;
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struct xpmem_addr addr;
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START("xpmem_make size: -1\n");
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mem = mmap(0, SZ_MEM, PROT_READ | PROT_WRITE,
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MAP_ANONYMOUS | MAP_PRIVATE |
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MAP_HUGETLB | (LARGE_PAGE_SHIFT << MAP_HUGE_SHIFT), -1, 0);
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INTERR(mem == MAP_FAILED, "mmap failed\n");
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memset(mem, 0, SZ_MEM);
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segid = xpmem_make(0, -1, XPMEM_PERMIT_MODE, (void *)0666);
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OKNG(segid != -1, "xpmem_make returned %lx\n", (unsigned long)segid);
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fflush(0);
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pid = fork();
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INTERR(pid == -1, "fork failed\n");
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if (pid == 0) {
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/* Child process */
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apid = xpmem_get(segid, XPMEM_RDWR, XPMEM_PERMIT_MODE, NULL);
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OKNG(apid != -1, "child: xpmem_get returned %lx\n",
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(unsigned long)apid);
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addr.apid = apid;
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addr.offset = (unsigned long)mem;
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attach = xpmem_attach(addr, SZ_MEM, NULL);
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OKNG(attach != (void *)-1, "child: xpmem_attach returned %lx\n",
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(unsigned long)attach);
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*((unsigned long *)attach) = TEST_VAL;
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ret = xpmem_detach(attach);
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OKNG(ret != -1, "child: xpmem_detach returned %d\n",
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ret);
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fflush(0);
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_exit(0);
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} else {
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/* Parent process */
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ret = waitpid(pid, &status, 0);
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INTERR(ret == -1, "waitpid failed\n");
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OKNG(*((unsigned long *)mem) == TEST_VAL,
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"parent: TEST_VAL found\n");
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ret = xpmem_remove(segid);
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OKNG(ret != -1, "parent: xpmem_remove returned %d\n",
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errno);
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}
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return 0;
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out:
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return 1;
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}
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