Added common-cpu.c and common-cpu.h

Added common files for the cpu core parking/pinning functionality

common/common-cpu.c

@@ -0,0 +1,113 @@
+/*
+
+Copyright (c) 2017-2019, Feral Interactive
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ * Neither the name of Feral Interactive nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+ */
+
+#include <stdlib.h>
+#include <sched.h>
+#include "common-cpu.h"
+#include "common-logging.h"
+
+char *parse_cpulist (char *cpulist, long *from, long *to)
+{
+	if (!cpulist || *cpulist == '\0')
+		return NULL;
+
+	char *endp;
+	*from = strtol(cpulist, &endp, 10);
+
+	if (endp == cpulist)
+		return NULL;
+
+	if (*endp == '\0' || *endp == ',') {
+		*to = *from;
+
+		if (*endp == '\0')
+			return endp;
+
+		return endp + 1;
+	}
+
+	if (*endp != '-')
+		return NULL;
+
+	cpulist = endp + 1;
+	*to = strtol(cpulist, &endp, 10);
+
+	if (endp == cpulist)
+		return NULL;
+
+	if (*to < *from)
+		return NULL;
+
+	if (*endp == '\0')
+		return endp;
+
+	return endp + 1;
+}
+
+/* Get the vendor for a device */
+/*enum GPUVendor gamemode_get_gpu_vendor(long device)
+{
+	enum GPUVendor vendor = Vendor_Invalid;
+
+	char path[64] = { 0 };
+	if (snprintf(path, 64, "/sys/class/drm/card%ld/device/vendor", device) < 0) {
+		LOG_ERROR("snprintf failed, will not apply gpu optimisations!\n");
+		return Vendor_Invalid;
+	}
+	FILE *file = fopen(path, "r");
+	if (!file) {
+		LOG_ERROR("Couldn't open vendor file at %s, will not apply gpu optimisations!\n", path);
+		return Vendor_Invalid;
+	}
+	char buff[64];
+	bool got_line = fgets(buff, 64, file) != NULL;
+	fclose(file);
+
+	if (got_line) {
+		vendor = strtol(buff, NULL, 0);
+	} else {
+		LOG_ERROR("Couldn't read contents of file %s, will not apply optimisations!\n", path);
+		return Vendor_Invalid;
+	}
+
+	if (!GPUVendorValid(vendor)) {
+		LOG_ERROR("Unknown vendor value (0x%04x) found, cannot apply optimisations!\n",
+		          (unsigned int)vendor);
+		LOG_ERROR("Known values are: 0x%04x (NVIDIA) 0x%04x (AMD) 0x%04x (Intel)\n",
+		          (unsigned int)Vendor_NVIDIA,
+		          (unsigned int)Vendor_AMD,
+		          (unsigned int)Vendor_Intel);
+		return Vendor_Invalid;
+	}
+
+	return vendor;
+}
+*/

common/common-cpu.h

@@ -0,0 +1,44 @@
+/*
+
+Copyright (c) 2017-2019, Feral Interactive
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ * Neither the name of Feral Interactive nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+ */
+
+#pragma once
+
+/* Storage for CPU info*/
+struct GameModeCPUInfo {
+	size_t num_cpu;
+	int park_or_pin; /* 0 to park 1 to pin */
+	cpu_set_t *online;
+	cpu_set_t *to_keep;
+};
+
+/* parses a list of cpu cores in the format "a,b-c,d-e,f" */
+char *parse_cpulist (char *cpulist, long *from, long *to);
+