[libvirt] [PATCH 1/2] util: rename qemuGetProcessInfo to virProcessGetStat
Wang King
king.wang at huawei.com
Wed May 24 03:31:00 UTC 2017
qemuGetProcessInfo is more likely a process utility function, just rename it
to virProcessGetStat and move it to virprocess.c source file.
---
src/libvirt_private.syms | 1 +
src/qemu/qemu_driver.c | 83 ++++++++++--------------------------------------
src/util/virprocess.c | 62 ++++++++++++++++++++++++++++++++++++
src/util/virprocess.h | 4 +++
4 files changed, 83 insertions(+), 67 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d361454..3681869 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2382,6 +2382,7 @@ virProcessGetMaxMemLock;
virProcessGetNamespaces;
virProcessGetPids;
virProcessGetStartTime;
+virProcessGetStat;
virProcessKill;
virProcessKillPainfully;
virProcessNamespaceAvailable;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 6c79d4f..a4aa5da 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -1378,68 +1378,6 @@ qemuGetSchedInfo(unsigned long long *cpuWait,
return ret;
}
-
-static int
-qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss,
- pid_t pid, int tid)
-{
- char *proc;
- FILE *pidinfo;
- unsigned long long usertime = 0, systime = 0;
- long rss = 0;
- int cpu = 0;
- int ret;
-
- /* In general, we cannot assume pid_t fits in int; but /proc parsing
- * is specific to Linux where int works fine. */
- if (tid)
- ret = virAsprintf(&proc, "/proc/%d/task/%d/stat", (int) pid, tid);
- else
- ret = virAsprintf(&proc, "/proc/%d/stat", (int) pid);
- if (ret < 0)
- return -1;
-
- pidinfo = fopen(proc, "r");
- VIR_FREE(proc);
-
- /* See 'man proc' for information about what all these fields are. We're
- * only interested in a very few of them */
- if (!pidinfo ||
- fscanf(pidinfo,
- /* pid -> stime */
- "%*d (%*[^)]) %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu"
- /* cutime -> endcode */
- "%*d %*d %*d %*d %*d %*d %*u %*u %ld %*u %*u %*u"
- /* startstack -> processor */
- "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %d",
- &usertime, &systime, &rss, &cpu) != 4) {
- VIR_WARN("cannot parse process status data");
- }
-
- /* We got jiffies
- * We want nanoseconds
- * _SC_CLK_TCK is jiffies per second
- * So calculate thus....
- */
- if (cpuTime)
- *cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime)
- / (unsigned long long)sysconf(_SC_CLK_TCK);
- if (lastCpu)
- *lastCpu = cpu;
-
- if (vm_rss)
- *vm_rss = rss * virGetSystemPageSizeKB();
-
-
- VIR_DEBUG("Got status for %d/%d user=%llu sys=%llu cpu=%d rss=%ld",
- (int) pid, tid, usertime, systime, cpu, rss);
-
- VIR_FORCE_FCLOSE(pidinfo);
-
- return 0;
-}
-
-
static int
qemuDomainHelperGetVcpus(virDomainObjPtr vm,
virVcpuInfoPtr info,
@@ -1482,9 +1420,9 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm,
vcpuinfo->number = i;
vcpuinfo->state = VIR_VCPU_RUNNING;
- if (qemuGetProcessInfo(&vcpuinfo->cpuTime,
- &vcpuinfo->cpu, NULL,
- vm->pid, vcpupid) < 0) {
+ if (virProcessGetStat(vm->pid, vcpupid,
+ &vcpuinfo->cpuTime,
+ &vcpuinfo->cpu, NULL) < 0) {
virReportSystemError(errno, "%s",
_("cannot get vCPU placement & pCPU time"));
return -1;
@@ -2641,7 +2579,7 @@ qemuDomainGetInfo(virDomainPtr dom,
}
if (virDomainObjIsActive(vm)) {
- if (qemuGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0) < 0) {
+ if (virProcessGetStat(vm->pid, 0, &(info->cpuTime), NULL, NULL) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot read cputime for domain"));
goto cleanup;
@@ -8172,6 +8110,8 @@ static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
bool force = (flags & VIR_DOMAIN_DEVICE_MODIFY_FORCE) != 0;
int ret = -1;
+ virQEMUCapsPtr qemuCaps = NULL;
+ qemuDomainObjPrivatePtr priv;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE;
@@ -8190,6 +8130,8 @@ static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
+ priv = vm->privateData;
+
if (virDomainUpdateDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
@@ -8216,6 +8158,12 @@ static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
goto endjob;
}
+ if (priv->qemuCaps)
+ qemuCaps = virObjectRef(priv->qemuCaps);
+ else if (!(qemuCaps = virQEMUCapsCacheLookup(caps, driver->qemuCapsCache,
+ vm->def->emulator)))
+ goto endjob;
+
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
@@ -8263,6 +8211,7 @@ static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
qemuDomainObjEndJob(driver, vm);
cleanup:
+ virObjectUnref(qemuCaps);
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
@@ -11107,7 +11056,7 @@ qemuDomainMemoryStatsInternal(virQEMUDriverPtr driver,
ret = 0;
}
- if (qemuGetProcessInfo(NULL, NULL, &rss, vm->pid, 0) < 0) {
+ if (virProcessGetStat(vm->pid, 0, NULL, NULL, &rss) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot get RSS for domain"));
} else {
diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index 1fbbbb3..98f4b25 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -1426,3 +1426,65 @@ virProcessSetScheduler(pid_t pid ATTRIBUTE_UNUSED,
}
#endif /* !HAVE_SCHED_SETSCHEDULER */
+
+int
+virProcessGetStat(pid_t pid, int tid,
+ unsigned long long *cpuTime,
+ int *lastCpu, long *vm_rss)
+{
+ char *proc;
+ FILE *pidinfo;
+ unsigned long long usertime = 0, systime = 0;
+ long rss = 0;
+ int cpu = 0;
+ int ret;
+
+ /* In general, we cannot assume pid_t fits in int; but /proc parsing
+ * is specific to Linux where int works fine. */
+ if (tid)
+ ret = virAsprintf(&proc, "/proc/%d/task/%d/stat", (int) pid, tid);
+ else
+ ret = virAsprintf(&proc, "/proc/%d/stat", (int) pid);
+ if (ret < 0)
+ return -1;
+
+ pidinfo = fopen(proc, "r");
+ VIR_FREE(proc);
+
+ /* See 'man proc' for information about what all these fields are. We're
+ * only interested in a very few of them */
+ if (!pidinfo ||
+ fscanf(pidinfo,
+ /* pid -> stime */
+ "%*d (%*[^)]) %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu"
+ /* cutime -> endcode */
+ "%*d %*d %*d %*d %*d %*d %*u %*u %ld %*u %*u %*u"
+ /* startstack -> processor */
+ "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %d",
+ &usertime, &systime, &rss, &cpu) != 4) {
+ VIR_WARN("cannot parse process status data");
+ }
+
+ /* We got jiffies
+ * We want nanoseconds
+ * _SC_CLK_TCK is jiffies per second
+ * So calculate thus....
+ */
+ if (cpuTime)
+ *cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime)
+ / (unsigned long long)sysconf(_SC_CLK_TCK);
+ if (lastCpu)
+ *lastCpu = cpu;
+
+ if (vm_rss)
+ *vm_rss = rss * virGetSystemPageSizeKB();
+
+
+ VIR_DEBUG("Got status for %d/%d user=%llu sys=%llu cpu=%d rss=%ld",
+ (int) pid, tid, usertime, systime, cpu, rss);
+
+ VIR_FORCE_FCLOSE(pidinfo);
+
+ return 0;
+
+}
diff --git a/src/util/virprocess.h b/src/util/virprocess.h
index 3c5a882..2a2b91d 100644
--- a/src/util/virprocess.h
+++ b/src/util/virprocess.h
@@ -106,4 +106,8 @@ typedef enum {
int virProcessNamespaceAvailable(unsigned int ns);
+int virProcessGetStat(pid_t pid, int tid,
+ unsigned long long *cpuTime,
+ int *lastCpu, long *vm_rss);
+
#endif /* __VIR_PROCESS_H__ */
--
2.8.3
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