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46d88d8dba
Previous patch handled the runtime case where a non-x86 host is fetching /proc/cpuinfo data for a microcode info that we know it doesn't exist. This change alone speeded everything by a bit for non-x86, but there is at least one major culprit left. qemuxml2argvtest does several arch-specific tests, and a good chunk of them are x86 exclusive. This means that 'hostArch' will be seen as x86 for these tests, even when running in non-x86 hosts. In a Power 9 server with 128 CPUs, qemuxml2argvtest takes 298 seconds to complete in average, and 'perf record' indicates that 95% of the time is spent in virHostCPUGetMicrocodeVersion(). This patch mocks virHostCPUGetMicrocodeVersion() to always return 0 in the tests, avoiding /proc/cpuinfo reads. This will make all tests behave arch-agnostic, and the microcode value being 0 has no impact on any existing test. This is a CI speed across the board for all archs, including x86, given that we're not reading /proc/cpuinfo in the tests. For a Thinkpad T480 laptop with 8 Intel i7 CPUs, qemuxml2argvtest went from 15.50 sec to 12.50 seconds. The performance gain is even more noticeable for huge servers with lots of CPUs. For the Power 9 server mentioned above, this patch speeds qemuxml2argvtest to 9 seconds, down from 298 sec. Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Ján Tomko <jtomko@redhat.com>
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/*
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* virhostcpu.h: helper APIs for host CPU info
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*
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* Copyright (C) 2006-2016 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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#pragma once
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#include "internal.h"
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#include "virarch.h"
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#include "virbitmap.h"
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#include "virenum.h"
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typedef struct _virHostCPUTscInfo virHostCPUTscInfo;
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typedef virHostCPUTscInfo *virHostCPUTscInfoPtr;
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struct _virHostCPUTscInfo {
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unsigned long long frequency;
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virTristateBool scaling;
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};
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int virHostCPUGetStats(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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bool virHostCPUHasBitmap(void);
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virBitmapPtr virHostCPUGetPresentBitmap(void);
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virBitmapPtr virHostCPUGetOnlineBitmap(void);
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virBitmapPtr virHostCPUGetAvailableCPUsBitmap(void);
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int virHostCPUGetCount(void);
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int virHostCPUGetThreadsPerSubcore(virArch arch) G_GNUC_NO_INLINE;
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int virHostCPUGetMap(unsigned char **cpumap,
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unsigned int *online,
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unsigned int flags);
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int virHostCPUGetInfo(virArch hostarch,
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unsigned int *cpus,
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unsigned int *mhz,
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unsigned int *nodes,
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unsigned int *sockets,
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unsigned int *cores,
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unsigned int *threads);
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int virHostCPUGetKVMMaxVCPUs(void) G_GNUC_NO_INLINE;
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int virHostCPUStatsAssign(virNodeCPUStatsPtr param,
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const char *name,
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unsigned long long value);
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#ifdef __linux__
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int virHostCPUGetSocket(unsigned int cpu, unsigned int *socket);
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int virHostCPUGetDie(unsigned int cpu, unsigned int *die);
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int virHostCPUGetCore(unsigned int cpu, unsigned int *core);
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virBitmapPtr virHostCPUGetSiblingsList(unsigned int cpu);
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#endif
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int virHostCPUGetOnline(unsigned int cpu, bool *online);
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unsigned int
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virHostCPUGetMicrocodeVersion(virArch hostArch) G_GNUC_NO_INLINE;
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int virHostCPUGetMSR(unsigned long index,
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uint64_t *msr);
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virHostCPUTscInfoPtr virHostCPUGetTscInfo(void);
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int virHostCPUGetSignature(char **signature);
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