Hi Scott,
You're right, in fact the simul test does do a barrier after the
stat. In the code below, the end() function does an MPI_Barrier.
-sam
void simul_file_stat(int shared) {
char *filename;
struct stat buf;
begin("setup");
filename = create_files("simul_file_stat", 0, shared);
end("setup");
begin("test");
/* All stat the file */
if (stat(filename, &buf) == -1) {
FAIL("stat failed");
}
end("test");
begin("cleanup");
remove_files("simul_file_stat", shared);
end("cleanup");
On Aug 15, 2007, at 7:37 PM, Scott Atchley wrote:
On Aug 15, 2007, at 6:53 PM, Pete Wyckoff wrote:
if (task == 0)
mkdir("foo");
MPI_Barrier();
sleep(3);
stat("foo");
if (task == 0)
rmdir("foo");
Hi Pete,
Isn't there a race condition between task 0 and the others after
the barrier? Can 0 stat the file and rmdir it before another task
can stat() it? If so, should there be a barrier after the stat()
and before the rmdir?
Scott
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