2016-06-27 13:40:31 +00:00
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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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#include <config.h>
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#include "virhostcpu.h"
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2021-01-20 10:30:34 +00:00
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#include "virhostmem.h"
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2021-07-22 09:45:38 +00:00
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#if WITH_QEMU
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# include "virmock.h"
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# include "qemu/qemu_capabilities.h"
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#endif
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2016-06-27 13:40:31 +00:00
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int
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virHostCPUGetKVMMaxVCPUs(void)
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{
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return INT_MAX;
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}
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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 13:27:54 +00:00
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unsigned int
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virHostCPUGetMicrocodeVersion(virArch hostArch G_GNUC_UNUSED)
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{
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return 0;
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}
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2021-07-16 09:44:32 +00:00
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2023-06-09 15:17:36 +00:00
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int
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virHostCPUGetPhysAddrSize(unsigned int *size)
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{
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*size = 64;
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return 0;
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}
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2021-07-22 09:45:38 +00:00
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#if WITH_QEMU
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2021-07-16 09:44:32 +00:00
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static bool (*real_virQEMUCapsGetKVMSupportsSecureGuest)(virQEMUCaps *qemuCaps);
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bool
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virQEMUCapsGetKVMSupportsSecureGuest(virQEMUCaps *qemuCaps)
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{
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if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_CONFIDENTAL_GUEST_SUPPORT) &&
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virQEMUCapsGet(qemuCaps, QEMU_CAPS_S390_PV_GUEST))
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return true;
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if (!real_virQEMUCapsGetKVMSupportsSecureGuest)
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VIR_MOCK_REAL_INIT(virQEMUCapsGetKVMSupportsSecureGuest);
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return real_virQEMUCapsGetKVMSupportsSecureGuest(qemuCaps);
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}
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2021-07-22 09:45:38 +00:00
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#endif
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2021-01-20 10:30:34 +00:00
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int
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virHostMemGetTHPSize(unsigned long long *size)
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{
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/* Pretend Transparent Huge Page size is 2MiB. */
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*size = 2048;
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return 0;
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}
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