[libvirt] [PATCH 03/17] nodeinfo: split CPU info retrieval out of nodeGetInfo
Daniel P. Berrange
berrange at redhat.com
Thu Apr 14 15:22:06 UTC 2016
Instead of having platform specific code in nodeGetInfo to
fetch CPU topology, split it all out into a new method
nodeGetCPUInfo.
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/nodeinfo.c | 172 +++++++++++++++++++++++++++++----------------------
src/nodeinfopriv.h | 7 ++-
tests/nodeinfotest.c | 5 +-
3 files changed, 108 insertions(+), 76 deletions(-)
diff --git a/src/nodeinfo.c b/src/nodeinfo.c
index bc5400f..e6a9d3d 100644
--- a/src/nodeinfo.c
+++ b/src/nodeinfo.c
@@ -608,14 +608,19 @@ nodeHasValidSubcoreConfiguration(int threads_per_subcore)
int
linuxNodeInfoCPUPopulate(FILE *cpuinfo,
virArch arch,
- virNodeInfoPtr nodeinfo)
+ unsigned int *cpus,
+ unsigned int *mhz,
+ unsigned int *nodes,
+ unsigned int *sockets,
+ unsigned int *cores,
+ unsigned int *threads)
{
virBitmapPtr present_cpus_map = NULL;
virBitmapPtr online_cpus_map = NULL;
char line[1024];
DIR *nodedir = NULL;
struct dirent *nodedirent = NULL;
- int cpus, cores, socks, threads, offline = 0;
+ int nodecpus, nodecores, nodesockets, nodethreads, offline = 0;
int threads_per_subcore = 0;
unsigned int node;
int ret = -1;
@@ -623,6 +628,9 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
char *sysfs_cpudir = NULL;
int direrr;
+ *mhz = 0;
+ *cpus = *nodes = *sockets = *cores = *threads = 0;
+
/* Start with parsing CPU clock speed from /proc/cpuinfo */
while (fgets(line, sizeof(line), cpuinfo) != NULL) {
if (ARCH_IS_X86(arch)) {
@@ -644,9 +652,8 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
/* Accept trailing fractional part. */
(*p == '\0' || *p == '.' || c_isspace(*p)))
- nodeinfo->mhz = ui;
+ *mhz = ui;
}
-
} else if (ARCH_IS_PPC(arch)) {
char *buf = line;
if (STRPREFIX(buf, "clock")) {
@@ -666,7 +673,7 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
/* Accept trailing fractional part. */
(*p == '\0' || *p == '.' || c_isspace(*p)))
- nodeinfo->mhz = ui;
+ *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
@@ -692,12 +699,12 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0
/* Accept trailing fractional part. */
&& (*p == '\0' || *p == '.' || c_isspace(*p)))
- nodeinfo->mhz = ui;
+ *mhz = ui;
}
} else if (ARCH_IS_S390(arch)) {
/* s390x has no realistic value for CPU speed,
* assign a value of zero to signify this */
- nodeinfo->mhz = 0;
+ *mhz = 0;
} else {
VIR_WARN("Parser for /proc/cpuinfo needs to be adapted for your architecture");
break;
@@ -758,38 +765,38 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
if (sscanf(nodedirent->d_name, "node%u", &node) != 1)
continue;
- nodeinfo->nodes++;
+ (*nodes)++;
if (virAsprintf(&sysfs_cpudir, "%s/node/%s",
sysfs_system_path, nodedirent->d_name) < 0)
goto cleanup;
- if ((cpus = virNodeParseNode(sysfs_cpudir, arch,
- present_cpus_map,
- online_cpus_map,
- threads_per_subcore,
- &socks, &cores,
- &threads, &offline)) < 0)
+ if ((nodecpus = virNodeParseNode(sysfs_cpudir, arch,
+ present_cpus_map,
+ online_cpus_map,
+ threads_per_subcore,
+ &nodesockets, &nodecores,
+ &nodethreads, &offline)) < 0)
goto cleanup;
VIR_FREE(sysfs_cpudir);
- nodeinfo->cpus += cpus;
+ *cpus += nodecpus;
- if (socks > nodeinfo->sockets)
- nodeinfo->sockets = socks;
+ if (nodesockets > *sockets)
+ *sockets = nodesockets;
- if (cores > nodeinfo->cores)
- nodeinfo->cores = cores;
+ if (nodecores > *cores)
+ *cores = nodecores;
- if (threads > nodeinfo->threads)
- nodeinfo->threads = threads;
+ if (nodethreads > *threads)
+ *threads = nodethreads;
}
if (direrr < 0)
goto cleanup;
- if (nodeinfo->cpus && nodeinfo->nodes)
+ if (*cpus && *nodes)
goto done;
fallback:
@@ -798,33 +805,33 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
if (virAsprintf(&sysfs_cpudir, "%s/cpu", sysfs_system_path) < 0)
goto cleanup;
- if ((cpus = virNodeParseNode(sysfs_cpudir, arch,
- present_cpus_map,
- online_cpus_map,
- threads_per_subcore,
- &socks, &cores,
- &threads, &offline)) < 0)
+ if ((nodecpus = virNodeParseNode(sysfs_cpudir, arch,
+ present_cpus_map,
+ online_cpus_map,
+ threads_per_subcore,
+ &nodesockets, &nodecores,
+ &nodethreads, &offline)) < 0)
goto cleanup;
- nodeinfo->nodes = 1;
- nodeinfo->cpus = cpus;
- nodeinfo->sockets = socks;
- nodeinfo->cores = cores;
- nodeinfo->threads = threads;
+ *nodes = 1;
+ *cpus = nodecpus;
+ *sockets = nodesockets;
+ *cores = nodecores;
+ *threads = nodethreads;
done:
/* There should always be at least one cpu, socket, node, and thread. */
- if (nodeinfo->cpus == 0) {
+ if (*cpus == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no CPUs found"));
goto cleanup;
}
- if (nodeinfo->sockets == 0) {
+ if (*sockets == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no sockets found"));
goto cleanup;
}
- if (nodeinfo->threads == 0) {
+ if (*threads == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no threads found"));
goto cleanup;
}
@@ -836,14 +843,14 @@ linuxNodeInfoCPUPopulate(FILE *cpuinfo,
* the nodeinfo structure isn't designed to carry the full topology so
* we're going to lie about the detected topology to notify the user
* to check the host capabilities for the actual topology. */
- if ((nodeinfo->nodes *
- nodeinfo->sockets *
- nodeinfo->cores *
- nodeinfo->threads) != (nodeinfo->cpus + offline)) {
- nodeinfo->nodes = 1;
- nodeinfo->sockets = 1;
- nodeinfo->cores = nodeinfo->cpus + offline;
- nodeinfo->threads = 1;
+ if ((*nodes *
+ *sockets *
+ *cores *
+ *threads) != (*cpus + offline)) {
+ *nodes = 1;
+ *sockets = 1;
+ *cores = *cpus + offline;
+ *threads = 1;
}
ret = 0;
@@ -1161,23 +1168,17 @@ virNodeGetSiblingsList(const char *dir, int cpu_id)
}
#endif
-int
-nodeGetInfo(virNodeInfoPtr nodeinfo)
-{
- virArch hostarch = virArchFromHost();
- unsigned long long memorybytes;
-
- memset(nodeinfo, 0, sizeof(*nodeinfo));
-
- if (virStrcpyStatic(nodeinfo->model, virArchToString(hostarch)) == NULL)
- return -1;
-
- if (nodeGetMemory(&memorybytes, NULL) < 0)
- return -1;
- nodeinfo->memory = memorybytes / 1024;
+static int
+nodeGetCPUInfo(virArch hostarch,
+ unsigned int *cpus,
+ unsigned int *mhz,
+ unsigned int *nodes,
+ unsigned int *sockets,
+ unsigned int *cores,
+ unsigned int *threads)
+{
#ifdef __linux__
- {
int ret = -1;
FILE *cpuinfo = fopen(CPUINFO_PATH, "r");
@@ -1187,28 +1188,27 @@ nodeGetInfo(virNodeInfoPtr nodeinfo)
return -1;
}
- ret = linuxNodeInfoCPUPopulate(cpuinfo, hostarch, nodeinfo);
+ ret = linuxNodeInfoCPUPopulate(cpuinfo, hostarch,
+ cpus, mhz, nodes,
+ sockets, cores, threads);
if (ret < 0)
goto cleanup;
cleanup:
VIR_FORCE_FCLOSE(cpuinfo);
return ret;
- }
#elif defined(__FreeBSD__) || defined(__APPLE__)
- {
- nodeinfo->nodes = 1;
- nodeinfo->sockets = 1;
- nodeinfo->threads = 1;
+ unsigned long cpu_freq;
+ size_t cpu_freq_len = sizeof(cpu_freq);
- nodeinfo->cpus = appleFreebsdNodeGetCPUCount();
- if (nodeinfo->cpus == -1)
+ *cpus = appleFreebsdNodeGetCPUCount();
+ if (*cpus == -1)
return -1;
- nodeinfo->cores = nodeinfo->cpus;
-
- unsigned long cpu_freq;
- size_t cpu_freq_len = sizeof(cpu_freq);
+ *nodes = 1;
+ *sockets = 1;
+ *cores = *cpus;
+ *threads = 1;
# ifdef __FreeBSD__
if (sysctlbyname("dev.cpu.0.freq", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
@@ -1216,18 +1216,17 @@ nodeGetInfo(virNodeInfoPtr nodeinfo)
return -1;
}
- nodeinfo->mhz = cpu_freq;
+ *mhz = cpu_freq;
# else
if (sysctlbyname("hw.cpufrequency", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
return -1;
}
- nodeinfo->mhz = cpu_freq / 1000000;
+ *mhz = cpu_freq / 1000000;
# endif
return 0;
- }
#else
/* XXX Solaris will need an impl later if they port QEMU driver */
virReportError(VIR_ERR_NO_SUPPORT, "%s",
@@ -1236,6 +1235,31 @@ nodeGetInfo(virNodeInfoPtr nodeinfo)
#endif
}
+
+int
+nodeGetInfo(virNodeInfoPtr nodeinfo)
+{
+ virArch hostarch = virArchFromHost();
+ unsigned long long memorybytes;
+
+ memset(nodeinfo, 0, sizeof(*nodeinfo));
+
+ if (virStrcpyStatic(nodeinfo->model, virArchToString(hostarch)) == NULL)
+ return -1;
+
+ if (nodeGetMemory(&memorybytes, NULL) < 0)
+ return -1;
+ nodeinfo->memory = memorybytes / 1024;
+
+ if (nodeGetCPUInfo(hostarch,
+ &nodeinfo->cpus, &nodeinfo->mhz,
+ &nodeinfo->nodes, &nodeinfo->sockets,
+ &nodeinfo->cores, &nodeinfo->threads) < 0)
+ return -1;
+
+ return 0;
+}
+
int
nodeGetCPUStats(int cpuNum ATTRIBUTE_UNUSED,
virNodeCPUStatsPtr params ATTRIBUTE_UNUSED,
diff --git a/src/nodeinfopriv.h b/src/nodeinfopriv.h
index 4fe489a..01bcb8d 100644
--- a/src/nodeinfopriv.h
+++ b/src/nodeinfopriv.h
@@ -29,7 +29,12 @@ void linuxNodeInfoSetSysFSSystemPath(const char *path);
int linuxNodeInfoCPUPopulate(FILE *cpuinfo,
virArch arch,
- virNodeInfoPtr nodeinfo);
+ unsigned int *cpus,
+ unsigned int *mhz,
+ unsigned int *nodes,
+ unsigned int *sockets,
+ unsigned int *cores,
+ unsigned int *threads);
int linuxNodeGetCPUStats(FILE *procstat,
int cpuNum,
diff --git a/tests/nodeinfotest.c b/tests/nodeinfotest.c
index 8d93024..951ae2f 100644
--- a/tests/nodeinfotest.c
+++ b/tests/nodeinfotest.c
@@ -41,7 +41,10 @@ linuxTestCompareFiles(const char *cpuinfofile,
}
memset(&nodeinfo, 0, sizeof(nodeinfo));
- if (linuxNodeInfoCPUPopulate(cpuinfo, arch, &nodeinfo) < 0) {
+ if (linuxNodeInfoCPUPopulate(cpuinfo, arch,
+ &nodeinfo.cpus, &nodeinfo.mhz,
+ &nodeinfo.nodes, &nodeinfo.sockets,
+ &nodeinfo.cores, &nodeinfo.threads) < 0) {
if (virTestGetDebug()) {
virErrorPtr error = virSaveLastError();
if (error && error->code != VIR_ERR_OK)
--
2.5.5
More information about the libvir-list
mailing list