2016-04-13 18:53:02 +01:00
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/*
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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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2019-06-18 11:12:52 -05:00
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#pragma once
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2016-04-13 18:53:02 +01:00
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2019-06-18 11:12:52 -05:00
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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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2019-05-30 16:34:59 +02:00
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typedef struct _virHostCPUTscInfo virHostCPUTscInfo;
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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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2016-04-13 18:53:02 +01:00
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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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2016-11-25 14:57:04 +01:00
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bool virHostCPUHasBitmap(void);
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2021-03-11 08:16:13 +01:00
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virBitmap *virHostCPUGetPresentBitmap(void);
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virBitmap *virHostCPUGetOnlineBitmap(void);
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virBitmap *virHostCPUGetAvailableCPUsBitmap(void);
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2020-06-26 19:10:43 -03:00
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2016-04-13 18:53:02 +01:00
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int virHostCPUGetCount(void);
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2019-10-15 13:24:34 +02:00
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int virHostCPUGetThreadsPerSubcore(virArch arch) G_GNUC_NO_INLINE;
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2016-04-13 18:53:02 +01:00
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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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2019-10-15 13:24:34 +02:00
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int virHostCPUGetKVMMaxVCPUs(void) G_GNUC_NO_INLINE;
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2016-06-24 20:33:13 +05:30
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2016-09-15 10:27:02 +02:00
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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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2019-06-18 11:12:52 -05:00
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#ifdef __linux__
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2017-03-07 15:11:22 +01:00
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int virHostCPUGetSocket(unsigned int cpu, unsigned int *socket);
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2019-12-16 18:10:29 +00:00
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int virHostCPUGetDie(unsigned int cpu, unsigned int *die);
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2017-03-07 15:11:22 +01:00
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int virHostCPUGetCore(unsigned int cpu, unsigned int *core);
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2021-03-11 08:16:13 +01:00
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virBitmap *virHostCPUGetSiblingsList(unsigned int cpu);
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2019-06-18 11:12:52 -05:00
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#endif
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2017-03-27 16:15:45 +02:00
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int virHostCPUGetOnline(unsigned int cpu, bool *online);
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2017-03-07 15:11:22 +01:00
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domaincapsmock: mock virHostCPUGetMicrocodeVersion()
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>
2020-08-24 10:27:54 -03:00
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unsigned int
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virHostCPUGetMicrocodeVersion(virArch hostArch) G_GNUC_NO_INLINE;
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2017-12-12 16:23:41 +01:00
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2019-03-22 16:44:02 +01:00
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int virHostCPUGetMSR(unsigned long index,
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uint64_t *msr);
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2021-03-11 08:16:13 +01:00
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virHostCPUTscInfo *virHostCPUGetTscInfo(void);
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2020-04-01 00:44:00 +02:00
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int virHostCPUGetSignature(char **signature);
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2021-07-22 16:05:01 +08:00
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int virHostCPUGetHaltPollTime(pid_t pid,
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unsigned long long *haltPollSuccess,
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unsigned long long *haltPollFail);
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