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mcexec: verify number of processes for partitioned execution

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This commit is contained in:
Balazs Gerofi
2017-09-21 16:11:56 +09:00
parent 203bfc2492
commit 5664125e57
1 changed files with 9 additions and 1 deletions
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10
executer/user/mcexec.c
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@@ -2150,6 +2150,11 @@ int main(int argc, char **argv)
return 1; return 1;
} }
if (nr_processes > ncpu) {
fprintf(stderr, "error: nr_processes can't exceed nr. of CPUs\n");
return EINVAL;
}
if (nr_threads > 0) { if (nr_threads > 0) {
n_threads = nr_threads; n_threads = nr_threads;
} }
@@ -2162,13 +2167,16 @@ int main(int argc, char **argv)
* When running with partitioned execution, do not allow * When running with partitioned execution, do not allow
* more threads then the corresponding number of CPUs. * more threads then the corresponding number of CPUs.
*/ */
if (nr_processes > 0) { if (nr_processes > 0 && nr_processes < ncpu) {
n_threads = (ncpu / nr_processes) + 4; n_threads = (ncpu / nr_processes) + 4;
if (n_threads == 0) { if (n_threads == 0) {
n_threads = 2; n_threads = 2;
} }
} }
else if (nr_processes == ncpu) {
n_threads = 1;
}
else { else {
n_threads = ncpu; n_threads = ncpu;
} }