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4fbf322fe9
It turns out that the cpuacct results properly account for offline
cpus, and always returns results for every possible cpu, not just
the online ones. So there is no need to check the map of online
cpus in the first place, merely only a need to know the maximum
possible cpu. Meanwhile, virNodeGetCPUBitmap had a subtle change
from returning the maximum id to instead returning the width of
the bitmap (one larger than the maximum id) in commit 2f4c5338,
which made this code encounter some off-by-one logic leading to
bad error messages when a cpu was offline:
$ virsh cpu-stats dom
error: Failed to virDomainGetCPUStats()
error: An error occurred, but the cause is unknown
Cleaning this up unraveled a chain of other unused variables.
* src/qemu/qemu_driver.c (qemuDomainGetPercpuStats): Drop
pointless check for cpumap changes, and use correct number of
cpus. Simplify signature.
(qemuDomainGetCPUStats): Adjust caller.
* src/nodeinfo.h (nodeGetCPUCount): New prototype.
(nodeGetCPUBitmap): Drop unused parameter.
* src/nodeinfo.c (nodeGetCPUBitmap): Likewise.
(nodeGetCPUMap): Adjust caller.
(nodeGetCPUCount): New function.
* src/libvirt_private.syms (nodeinfo.h): Export it.
68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
/*
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* nodeinfo.c: Helper routines for OS specific node information
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*
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* Copyright (C) 2006-2008, 2011-2012 Red Hat, Inc.
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* Copyright (C) 2006 Daniel P. Berrange
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel P. Berrange <berrange@redhat.com>
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*/
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#ifndef __VIR_NODEINFO_H__
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# define __VIR_NODEINFO_H__
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# include "libvirt/libvirt.h"
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# include "capabilities.h"
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int nodeGetInfo(virConnectPtr conn, virNodeInfoPtr nodeinfo);
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int nodeCapsInitNUMA(virCapsPtr caps);
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int nodeGetCPUStats(virConnectPtr conn,
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int cpuNum,
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virNodeCPUStatsPtr params,
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int *nparams,
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unsigned int flags);
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int nodeGetMemoryStats(virConnectPtr conn,
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int cellNum,
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virNodeMemoryStatsPtr params,
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int *nparams,
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unsigned int flags);
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int nodeGetCellsFreeMemory(virConnectPtr conn,
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unsigned long long *freeMems,
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int startCell,
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int maxCells);
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unsigned long long nodeGetFreeMemory(virConnectPtr conn);
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virBitmapPtr nodeGetCPUBitmap(int *max_id);
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int nodeGetCPUCount(void);
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int nodeGetMemoryParameters(virConnectPtr conn,
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virTypedParameterPtr params,
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int *nparams,
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unsigned int flags);
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int nodeSetMemoryParameters(virConnectPtr conn,
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virTypedParameterPtr params,
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int nparams,
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unsigned int flags);
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int nodeGetCPUMap(virConnectPtr conn,
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unsigned char **cpumap,
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unsigned int *online,
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unsigned int flags);
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#endif /* __VIR_NODEINFO_H__*/
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