Commit 7c5234dd authored by Philippe Gerum's avatar Philippe Gerum
Browse files

benchmarks/latmus: allow for overriding CPU affinity

Using -C bypasses the CPU checks, allowing to set the CPU affinity to
a non-isolated core.

Signed-off-by: Philippe Gerum's avatarPhilippe Gerum <>
parent acf10e3a
......@@ -91,7 +91,9 @@ static sem_t logger_done;
static bool c_state_restricted;
#define short_optlist "ikusrqbKmtp:A:T:v::l:g::H:P:c:Z:z:I:O:"
static bool force_cpu;
#define short_optlist "ikusrqbKmtp:A:T:v::l:g::H:P:c:Z:z:I:O:C:"
static const struct option options[] = {
......@@ -189,6 +191,11 @@ static const struct option options[] = {
.has_arg = required_argument,
.val = 'c',
.name = "force-cpu",
.has_arg = required_argument,
.val = 'C',
.name = "oob-gpio",
.has_arg = required_argument,
......@@ -1068,6 +1075,9 @@ static void determine_responder_cpu(bool inband_test)
goto finish;
if (force_cpu)
goto finish;
if (inband_test)
goto pick_isolated;
......@@ -1129,7 +1139,8 @@ static void usage(void)
fprintf(stderr, "-s --sirq measure in-band response time to synthetic irq\n");
fprintf(stderr, "-p --period=<us> sampling period\n");
fprintf(stderr, "-P --priority=<prio> responder thread priority [=90]\n");
fprintf(stderr, "-c --cpu=<n> pin responder thread to CPU [=0]\n");
fprintf(stderr, "-c --cpu=<n> pin responder thread to CPU [=current]\n");
fprintf(stderr, "-C --force-cpu=<n> similar to -c, accept non-isolated CPU\n");
fprintf(stderr, "-r --reset reset core timer gravity to factory default\n");
fprintf(stderr, "-b --background run in the background (daemon mode)\n");
fprintf(stderr, "-K --keep-going keep going on unexpected switch to in-band mode\n");
......@@ -1261,6 +1272,9 @@ int main(int argc, char *const argv[])
error(1, EINVAL, "invalid thread priority "
"(0 < priority < %d)", max_prio);
case 'C':
force_cpu = true;
/* fallthrough */
case 'c':
responder_cpu = atoi(optarg);
if (responder_cpu < 0 || responder_cpu >= CPU_SETSIZE)
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