/* * nodeinfo.c: Helper routines for OS specific node information * * Copyright (C) 2006-2008, 2010-2012 Red Hat, Inc. * Copyright (C) 2006 Daniel P. Berrange * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Author: Daniel P. Berrange */ #include #include #include #include #include #include #include #include #include #include "conf/domain_conf.h" #if HAVE_NUMACTL # define NUMA_VERSION1_COMPATIBILITY 1 # include #endif #include "c-ctype.h" #include "memory.h" #include "nodeinfo.h" #include "physmem.h" #include "util.h" #include "logging.h" #include "virterror_internal.h" #include "count-one-bits.h" #include "intprops.h" #include "virfile.h" #define VIR_FROM_THIS VIR_FROM_NONE #define nodeReportError(code, ...) \ virReportErrorHelper(VIR_FROM_NONE, code, __FILE__, \ __FUNCTION__, __LINE__, __VA_ARGS__) #ifdef __linux__ # define CPUINFO_PATH "/proc/cpuinfo" # define CPU_SYS_PATH "/sys/devices/system/cpu" # define PROCSTAT_PATH "/proc/stat" # define MEMINFO_PATH "/proc/meminfo" # define NODE_SYS_PATH "/sys/devices/system/node" # define LINUX_NB_CPU_STATS 4 # define LINUX_NB_MEMORY_STATS_ALL 4 # define LINUX_NB_MEMORY_STATS_CELL 2 /* NB, this is not static as we need to call it from the testsuite */ int linuxNodeInfoCPUPopulate(FILE *cpuinfo, const char *sysfs_cpudir, virNodeInfoPtr nodeinfo); static int linuxNodeGetCPUStats(FILE *procstat, int cpuNum, virNodeCPUStatsPtr params, int *nparams); static int linuxNodeGetMemoryStats(FILE *meminfo, int cellNum, virNodeMemoryStatsPtr params, int *nparams); static char sysfs_path[1024]; /* Return the positive decimal contents of the given * (*sysfs_path)/cpu%u/FILE, or -1 on error. If MISSING_OK and the * file could not be found, return 1 instead of an error; this is * because some machines cannot hot-unplug cpu0, or because * hot-unplugging is disabled. */ static int get_cpu_value(unsigned int cpu, const char *file, bool missing_ok) { char *path; FILE *pathfp; int value = -1; char value_str[INT_BUFSIZE_BOUND(value)]; char *tmp; if (virAsprintf(&path, "%s/cpu%u/%s", sysfs_path, cpu, file) < 0) { virReportOOMError(); return -1; } pathfp = fopen(path, "r"); if (pathfp == NULL) { if (missing_ok && errno == ENOENT) value = 1; else virReportSystemError(errno, _("cannot open %s"), path); goto cleanup; } if (fgets(value_str, sizeof(value_str), pathfp) == NULL) { virReportSystemError(errno, _("cannot read from %s"), path); goto cleanup; } if (virStrToLong_i(value_str, &tmp, 10, &value) < 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, _("could not convert '%s' to an integer"), value_str); goto cleanup; } cleanup: VIR_FORCE_FCLOSE(pathfp); VIR_FREE(path); return value; } /* Check if CPU is online via sysfs_path/cpu%u/online. Return 1 if online, 0 if offline, and -1 on error. */ static int cpu_online(unsigned int cpu) { return get_cpu_value(cpu, "online", true); } static unsigned long count_thread_siblings(unsigned int cpu) { unsigned long ret = 0; char *path; FILE *pathfp; char str[1024]; int i; if (virAsprintf(&path, "%s/cpu%u/topology/thread_siblings", sysfs_path, cpu) < 0) { virReportOOMError(); return 0; } pathfp = fopen(path, "r"); if (pathfp == NULL) { virReportSystemError(errno, _("cannot open %s"), path); VIR_FREE(path); return 0; } if (fgets(str, sizeof(str), pathfp) == NULL) { virReportSystemError(errno, _("cannot read from %s"), path); goto cleanup; } i = 0; while (str[i] != '\0') { if (c_isdigit(str[i])) ret += count_one_bits(str[i] - '0'); else if (str[i] >= 'A' && str[i] <= 'F') ret += count_one_bits(str[i] - 'A' + 10); else if (str[i] >= 'a' && str[i] <= 'f') ret += count_one_bits(str[i] - 'a' + 10); i++; } cleanup: VIR_FORCE_FCLOSE(pathfp); VIR_FREE(path); return ret; } static int parse_socket(unsigned int cpu) { int ret = get_cpu_value(cpu, "topology/physical_package_id", false); # if defined(__powerpc__) || \ defined(__powerpc64__) || \ defined(__s390__) || \ defined(__s390x__) /* ppc and s390(x) has -1 */ if (ret < 0) ret = 0; # endif return ret; } static int parse_core(unsigned int cpu) { return get_cpu_value(cpu, "topology/core_id", false); } int linuxNodeInfoCPUPopulate(FILE *cpuinfo, const char *sysfs_cpudir, virNodeInfoPtr nodeinfo) { char line[1024]; DIR *cpudir = NULL; struct dirent *cpudirent = NULL; unsigned int cpu; unsigned long core, sock, cur_threads; cpu_set_t core_mask; cpu_set_t socket_mask; int online; nodeinfo->cpus = 0; nodeinfo->mhz = 0; nodeinfo->cores = 0; nodeinfo->nodes = 1; # if HAVE_NUMACTL if (numa_available() >= 0) nodeinfo->nodes = numa_max_node() + 1; # endif if (!virStrcpyStatic(sysfs_path, sysfs_cpudir)) { virReportSystemError(errno, _("cannot copy %s"), sysfs_cpudir); return -1; } /* NB: It is impossible to fill our nodes, since cpuinfo * has no knowledge of NUMA nodes */ /* NOTE: hyperthreads are ignored here; they are parsed out of /sys */ while (fgets(line, sizeof(line), cpuinfo) != NULL) { char *buf = line; # if defined(__x86_64__) || \ defined(__amd64__) || \ defined(__i386__) if (STRPREFIX(buf, "cpu MHz")) { char *p; unsigned int ui; buf += 9; while (*buf && c_isspace(*buf)) buf++; if (*buf != ':' || !buf[1]) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("parsing cpuinfo cpu MHz")); return -1; } if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 /* Accept trailing fractional part. */ && (*p == '\0' || *p == '.' || c_isspace(*p))) nodeinfo->mhz = ui; } # elif defined(__powerpc__) || \ defined(__powerpc64__) if (STRPREFIX(buf, "clock")) { char *p; unsigned int ui; buf += 5; while (*buf && c_isspace(*buf)) buf++; if (*buf != ':' || !buf[1]) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("parsing cpuinfo cpu MHz")); return -1; } if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 /* Accept trailing fractional part. */ && (*p == '\0' || *p == '.' || c_isspace(*p))) nodeinfo->mhz = ui; /* No other interesting infos are available in /proc/cpuinfo. * However, there is a line identifying processor's version, * identification and machine, but we don't want it to be caught * and parsed in next iteration, because it is not in expected * format and thus lead to error. */ } # else # warning Parser for /proc/cpuinfo needs to be adapted for your architecture # endif } /* OK, we've parsed clock speed out of /proc/cpuinfo. Get the core, socket * thread and topology information from /sys */ cpudir = opendir(sysfs_cpudir); if (cpudir == NULL) { virReportSystemError(errno, _("cannot opendir %s"), sysfs_cpudir); return -1; } CPU_ZERO(&core_mask); CPU_ZERO(&socket_mask); while ((cpudirent = readdir(cpudir))) { if (sscanf(cpudirent->d_name, "cpu%u", &cpu) != 1) continue; online = cpu_online(cpu); if (online < 0) { closedir(cpudir); return -1; } if (!online) continue; nodeinfo->cpus++; /* Parse core */ core = parse_core(cpu); if (!CPU_ISSET(core, &core_mask)) { CPU_SET(core, &core_mask); nodeinfo->cores++; } /* Parse socket */ sock = parse_socket(cpu); if (!CPU_ISSET(sock, &socket_mask)) { CPU_SET(sock, &socket_mask); nodeinfo->sockets++; } cur_threads = count_thread_siblings(cpu); if (cur_threads == 0) { closedir(cpudir); return -1; } if (cur_threads > nodeinfo->threads) nodeinfo->threads = cur_threads; } if (errno) { virReportSystemError(errno, _("problem reading %s"), sysfs_path); closedir(cpudir); return -1; } closedir(cpudir); /* there should always be at least one cpu, socket and one thread */ if (nodeinfo->cpus == 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no CPUs found")); return -1; } if (nodeinfo->sockets == 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no sockets found")); return -1; } if (nodeinfo->threads == 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no threads found")); return -1; } /* nodeinfo->sockets is supposed to be a number of sockets per NUMA node, * however if NUMA nodes are not composed of whole sockets, we just lie * about the number of NUMA nodes and force apps to check capabilities XML * for the actual NUMA topology. */ if (nodeinfo->sockets % nodeinfo->nodes == 0) nodeinfo->sockets /= nodeinfo->nodes; else nodeinfo->nodes = 1; return 0; } # define TICK_TO_NSEC (1000ull * 1000ull * 1000ull / sysconf(_SC_CLK_TCK)) int linuxNodeGetCPUStats(FILE *procstat, int cpuNum, virNodeCPUStatsPtr params, int *nparams) { int ret = -1; char line[1024]; unsigned long long usr, ni, sys, idle, iowait; unsigned long long irq, softirq, steal, guest, guest_nice; char cpu_header[3 + INT_BUFSIZE_BOUND(cpuNum)]; if ((*nparams) == 0) { /* Current number of cpu stats supported by linux */ *nparams = LINUX_NB_CPU_STATS; ret = 0; goto cleanup; } if ((*nparams) != LINUX_NB_CPU_STATS) { nodeReportError(VIR_ERR_INVALID_ARG, "%s", _("Invalid parameter count")); goto cleanup; } if (cpuNum == VIR_NODE_CPU_STATS_ALL_CPUS) { strcpy(cpu_header, "cpu"); } else { snprintf(cpu_header, sizeof(cpu_header), "cpu%d", cpuNum); } while (fgets(line, sizeof(line), procstat) != NULL) { char *buf = line; if (STRPREFIX(buf, cpu_header)) { /* aka logical CPU time */ int i; if (sscanf(buf, "%*s %llu %llu %llu %llu %llu" // user ~ iowait "%llu %llu %llu %llu %llu", // irq ~ guest_nice &usr, &ni, &sys, &idle, &iowait, &irq, &softirq, &steal, &guest, &guest_nice) < 4) { continue; } for (i = 0; i < *nparams; i++) { virNodeCPUStatsPtr param = ¶ms[i]; switch (i) { case 0: /* fill kernel cpu time here */ if (virStrcpyStatic(param->field, VIR_NODE_CPU_STATS_KERNEL) == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field kernel cpu time too long for destination")); goto cleanup; } param->value = (sys + irq + softirq) * TICK_TO_NSEC; break; case 1: /* fill user cpu time here */ if (virStrcpyStatic(param->field, VIR_NODE_CPU_STATS_USER) == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field kernel cpu time too long for destination")); goto cleanup; } param->value = (usr + ni) * TICK_TO_NSEC; break; case 2: /* fill idle cpu time here */ if (virStrcpyStatic(param->field, VIR_NODE_CPU_STATS_IDLE) == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field kernel cpu time too long for destination")); goto cleanup; } param->value = idle * TICK_TO_NSEC; break; case 3: /* fill iowait cpu time here */ if (virStrcpyStatic(param->field, VIR_NODE_CPU_STATS_IOWAIT) == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field kernel cpu time too long for destination")); goto cleanup; } param->value = iowait * TICK_TO_NSEC; break; default: break; /* should not hit here */ } } ret = 0; goto cleanup; } } nodeReportError(VIR_ERR_INVALID_ARG, "%s", _("Invalid cpu number")); cleanup: return ret; } int linuxNodeGetMemoryStats(FILE *meminfo, int cellNum, virNodeMemoryStatsPtr params, int *nparams) { int ret = -1; int i = 0, j = 0, k = 0; int found = 0; int nr_param; char line[1024]; char meminfo_hdr[VIR_NODE_MEMORY_STATS_FIELD_LENGTH]; unsigned long val; struct field_conv { const char *meminfo_hdr; // meminfo header const char *field; // MemoryStats field name } field_conv[] = { {"MemTotal:", VIR_NODE_MEMORY_STATS_TOTAL}, {"MemFree:", VIR_NODE_MEMORY_STATS_FREE}, {"Buffers:", VIR_NODE_MEMORY_STATS_BUFFERS}, {"Cached:", VIR_NODE_MEMORY_STATS_CACHED}, {NULL, NULL} }; if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) { nr_param = LINUX_NB_MEMORY_STATS_ALL; } else { nr_param = LINUX_NB_MEMORY_STATS_CELL; } if ((*nparams) == 0) { /* Current number of memory stats supported by linux */ *nparams = nr_param; ret = 0; goto cleanup; } if ((*nparams) != nr_param) { nodeReportError(VIR_ERR_INVALID_ARG, "%s", _("Invalid stats count")); goto cleanup; } while (fgets(line, sizeof(line), meminfo) != NULL) { char *buf = line; if (STRPREFIX(buf, "Node ")) { /* * /sys/devices/system/node/nodeX/meminfo format is below. * So, skip prefix "Node XX ". * * Node 0 MemTotal: 8386980 kB * Node 0 MemFree: 5300920 kB * : */ char *p; p = buf; for (i = 0; i < 2; i++) { p = strchr(p, ' '); if (p == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no prefix found")); goto cleanup; } p++; } buf = p; } if (sscanf(buf, "%s %lu kB", meminfo_hdr, &val) < 2) continue; for (j = 0; field_conv[j].meminfo_hdr != NULL; j++) { struct field_conv *convp = &field_conv[j]; if (STREQ(meminfo_hdr, convp->meminfo_hdr)) { virNodeMemoryStatsPtr param = ¶ms[k++]; if (virStrcpyStatic(param->field, convp->field) == NULL) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Field kernel memory too long for destination")); goto cleanup; } param->value = val; found++; break; } } if (found >= nr_param) break; } if (found == 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no available memory line found")); goto cleanup; } ret = 0; cleanup: return ret; } /* * Linux maintains cpu bit map. For example, if cpuid=5's flag is not set * and max cpu is 7. The map file shows 0-4,6-7. This function parses * it and returns cpumap. */ static char * linuxParseCPUmap(int *max_cpuid, const char *path) { char *map = NULL; char *str = NULL; int max_id = 0, i; if (virFileReadAll(path, 5 * VIR_DOMAIN_CPUMASK_LEN, &str) < 0) { virReportOOMError(); goto error; } if (VIR_ALLOC_N(map, VIR_DOMAIN_CPUMASK_LEN) < 0) { virReportOOMError(); goto error; } if (virDomainCpuSetParse(str, 0, map, VIR_DOMAIN_CPUMASK_LEN) < 0) { goto error; } for (i = 0; i < VIR_DOMAIN_CPUMASK_LEN; i++) { if (map[i]) { max_id = i; } } *max_cpuid = max_id; return map; error: VIR_FREE(str); VIR_FREE(map); return NULL; } #endif int nodeGetInfo(virConnectPtr conn ATTRIBUTE_UNUSED, virNodeInfoPtr nodeinfo) { struct utsname info; memset(nodeinfo, 0, sizeof(*nodeinfo)); uname(&info); if (virStrcpyStatic(nodeinfo->model, info.machine) == NULL) return -1; #ifdef __linux__ { int ret; char *sysfs_cpuinfo; FILE *cpuinfo = fopen(CPUINFO_PATH, "r"); if (!cpuinfo) { virReportSystemError(errno, _("cannot open %s"), CPUINFO_PATH); return -1; } if (virAsprintf(&sysfs_cpuinfo, CPU_SYS_PATH) < 0) { virReportOOMError(); return -1; } ret = linuxNodeInfoCPUPopulate(cpuinfo, sysfs_cpuinfo, nodeinfo); VIR_FORCE_FCLOSE(cpuinfo); if (ret < 0) { VIR_FREE(sysfs_cpuinfo); return -1; } VIR_FREE(sysfs_cpuinfo); /* Convert to KB. */ nodeinfo->memory = physmem_total () / 1024; return ret; } #else /* XXX Solaris will need an impl later if they port QEMU driver */ nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("node info not implemented on this platform")); return -1; #endif } int nodeGetCPUStats(virConnectPtr conn ATTRIBUTE_UNUSED, int cpuNum ATTRIBUTE_UNUSED, virNodeCPUStatsPtr params ATTRIBUTE_UNUSED, int *nparams ATTRIBUTE_UNUSED, unsigned int flags) { virCheckFlags(0, -1); #ifdef __linux__ { int ret; FILE *procstat = fopen(PROCSTAT_PATH, "r"); if (!procstat) { virReportSystemError(errno, _("cannot open %s"), PROCSTAT_PATH); return -1; } ret = linuxNodeGetCPUStats(procstat, cpuNum, params, nparams); VIR_FORCE_FCLOSE(procstat); return ret; } #else nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("node CPU stats not implemented on this platform")); return -1; #endif } int nodeGetMemoryStats(virConnectPtr conn ATTRIBUTE_UNUSED, int cellNum ATTRIBUTE_UNUSED, virNodeMemoryStatsPtr params ATTRIBUTE_UNUSED, int *nparams ATTRIBUTE_UNUSED, unsigned int flags) { virCheckFlags(0, -1); #ifdef __linux__ { int ret; char *meminfo_path = NULL; FILE *meminfo; if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) { meminfo_path = strdup(MEMINFO_PATH); if (!meminfo_path) { virReportOOMError(); return -1; } } else { # if HAVE_NUMACTL if (numa_available() < 0) { # endif nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("NUMA not supported on this host")); return -1; # if HAVE_NUMACTL } # endif # if HAVE_NUMACTL if (cellNum > numa_max_node()) { nodeReportError(VIR_ERR_INVALID_ARG, "%s", _("Invalid cell number")); return -1; } # endif if (virAsprintf(&meminfo_path, "%s/node%d/meminfo", NODE_SYS_PATH, cellNum) < 0) { virReportOOMError(); return -1; } } meminfo = fopen(meminfo_path, "r"); if (!meminfo) { virReportSystemError(errno, _("cannot open %s"), meminfo_path); VIR_FREE(meminfo_path); return -1; } ret = linuxNodeGetMemoryStats(meminfo, cellNum, params, nparams); VIR_FORCE_FCLOSE(meminfo); VIR_FREE(meminfo_path); return ret; } #else nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("node memory stats not implemented on this platform")); return -1; #endif } char * nodeGetCPUmap(virConnectPtr conn ATTRIBUTE_UNUSED, int *max_id ATTRIBUTE_UNUSED, const char *mapname ATTRIBUTE_UNUSED) { #ifdef __linux__ char *path; char *cpumap; if (virAsprintf(&path, CPU_SYS_PATH "/%s", mapname) < 0) { virReportOOMError(); return NULL; } cpumap = linuxParseCPUmap(max_id, path); VIR_FREE(path); return cpumap; #else nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("node cpumap not implemented on this platform")); return NULL; #endif } #if HAVE_NUMACTL # if LIBNUMA_API_VERSION <= 1 # define NUMA_MAX_N_CPUS 4096 # else # define NUMA_MAX_N_CPUS (numa_all_cpus_ptr->size) # endif # define n_bits(var) (8 * sizeof(var)) # define MASK_CPU_ISSET(mask, cpu) \ (((mask)[((cpu) / n_bits(*(mask)))] >> ((cpu) % n_bits(*(mask)))) & 1) int nodeCapsInitNUMA(virCapsPtr caps) { int n; unsigned long *mask = NULL; unsigned long *allonesmask = NULL; int *cpus = NULL; int ret = -1; int max_n_cpus = NUMA_MAX_N_CPUS; if (numa_available() < 0) return 0; int mask_n_bytes = max_n_cpus / 8; if (VIR_ALLOC_N(mask, mask_n_bytes / sizeof *mask) < 0) goto cleanup; if (VIR_ALLOC_N(allonesmask, mask_n_bytes / sizeof *mask) < 0) goto cleanup; memset(allonesmask, 0xff, mask_n_bytes); for (n = 0 ; n <= numa_max_node() ; n++) { int i; int ncpus; /* The first time this returns -1, ENOENT if node doesn't exist... */ if (numa_node_to_cpus(n, mask, mask_n_bytes) < 0) { VIR_WARN("NUMA topology for cell %d of %d not available, ignoring", n, numa_max_node()+1); continue; } /* second, third... times it returns an all-1's mask */ if (memcmp(mask, allonesmask, mask_n_bytes) == 0) { VIR_DEBUG("NUMA topology for cell %d of %d is all ones, ignoring", n, numa_max_node()+1); continue; } for (ncpus = 0, i = 0 ; i < max_n_cpus ; i++) if (MASK_CPU_ISSET(mask, i)) ncpus++; if (VIR_ALLOC_N(cpus, ncpus) < 0) goto cleanup; for (ncpus = 0, i = 0 ; i < max_n_cpus ; i++) if (MASK_CPU_ISSET(mask, i)) cpus[ncpus++] = i; if (virCapabilitiesAddHostNUMACell(caps, n, ncpus, cpus) < 0) goto cleanup; VIR_FREE(cpus); } ret = 0; cleanup: VIR_FREE(cpus); VIR_FREE(mask); VIR_FREE(allonesmask); return ret; } int nodeGetCellsFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED, unsigned long long *freeMems, int startCell, int maxCells) { int n, lastCell, numCells; int ret = -1; int maxCell; if (numa_available() < 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("NUMA not supported on this host")); goto cleanup; } maxCell = numa_max_node(); if (startCell > maxCell) { nodeReportError(VIR_ERR_INTERNAL_ERROR, _("start cell %d out of range (0-%d)"), startCell, maxCell); goto cleanup; } lastCell = startCell + maxCells - 1; if (lastCell > maxCell) lastCell = maxCell; for (numCells = 0, n = startCell ; n <= lastCell ; n++) { long long mem; if (numa_node_size64(n, &mem) < 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, _("Failed to query NUMA free memory for node: %d"), n); goto cleanup; } freeMems[numCells++] = mem; } ret = numCells; cleanup: return ret; } unsigned long long nodeGetFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED) { unsigned long long freeMem = 0; int n; if (numa_available() < 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("NUMA not supported on this host")); goto cleanup; } for (n = 0 ; n <= numa_max_node() ; n++) { long long mem; if (numa_node_size64(n, &mem) < 0) { nodeReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Failed to query NUMA free memory")); goto cleanup; } freeMem += mem; } cleanup: return freeMem; } #else int nodeCapsInitNUMA(virCapsPtr caps ATTRIBUTE_UNUSED) { return 0; } int nodeGetCellsFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED, unsigned long long *freeMems ATTRIBUTE_UNUSED, int startCell ATTRIBUTE_UNUSED, int maxCells ATTRIBUTE_UNUSED) { nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("NUMA memory information not available on this platform")); return -1; } unsigned long long nodeGetFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED) { nodeReportError(VIR_ERR_NO_SUPPORT, "%s", _("NUMA memory information not available on this platform")); return 0; } #endif