Add go bindings for libpqos

lib/acpi.c

@@ -473,6 +473,20 @@ acpi_get_sig(const char *sig)
                         return tbl;
         }
 
+        /*
+         * When the kernel exposes ACPI tables under /sys/firmware/acpi/tables
+         * it exposes all of them there (every table listed in the RSDT/XSDT,
+         * whether or not the kernel supports it). So if that directory exists
+         * but this table is not in it, the table is not present on the
+         * platform and scanning memory for it would be pointless.
+         */
+        if (pqos_dir_exists(ACPI_TABLE_FS_PATH)) {
+                LOG_DEBUG("ACPI table %s not present in sysfs; "
+                          "skipping memory scan\n",
+                          sig);
+                return NULL;
+        }
+
         LOG_DEBUG("Trying to obtain %s acpi table from ACPI memory\n", sig);
         return acpi_get_mmap(sig);
 }

lib/cpuinfo.c

@@ -489,8 +489,25 @@ cpuinfo_build_topo(struct apic_info *apic)
 
         for (i = 0; i < max_core_count; ++i)
                 if (detect_cpu(i, apic, &l_cpu->cores[core_count],
-                               max_core_count) == 0)
+                               max_core_count) == 0) {
+#ifdef __linux__
+                        /*
+                         * The APIC-derived topology does not give the
+                         * physical core id, so read it from sysfs (same
+                         * source as the OS interface). SMT siblings share
+                         * (socket, core_id). Left at 0 if unavailable.
+                         */
+                        char core_path[256];
+
+                        snprintf(core_path, sizeof(core_path) - 1,
+                                 "/sys/devices/system/cpu/cpu%u/topology/"
+                                 "core_id",
+                                 l_cpu->cores[core_count].lcore);
+                        pqos_fread_uint(core_path,
+                                        &l_cpu->cores[core_count].core_id);
+#endif
                         core_count++;
+                }
 
         if (set_affinity_mask(current_mask, max_core_count) != 0) {
                 LOG_ERROR("Couldn't restore original CPU affinity mask!");

lib/go/.gitignore

@@ -0,0 +1,43 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool
+*.out
+
+# Dependency directories
+vendor/
+
+# Go workspace file
+go.work
+
+# Build artifacts
+examples/*/capability
+examples/*/simple
+examples/capability/capability
+examples/simple/simple
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Temporary files
+*.tmp
+*.bak
+
+# Go build cache
+.cache/
+
+# Coverage reports
+coverage.txt
+coverage.html