From: Mihai Carabas <mihai.carabas@oracle.com>
Cc: "Mihai Carabas" <mihai.carabas@oracle.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Wanpeng Li" <wanpengli@tencent.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Daniel Lezcano" <daniel.lezcano@linaro.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Kees Cook" <keescook@chromium.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Petr Mladek" <pmladek@suse.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Sami Tolvanen" <samitolvanen@google.com>,
"Nicholas Piggin" <npiggin@gmail.com>,
"Juerg Haefliger" <juerg.haefliger@canonical.com>,
"Mickaël Salaün" <mic@digikod.net>,
"Joao Martins" <joao.m.martins@oracle.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Ankur Arora" <ankur.a.arora@oracle.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: [PATCH] Enable haltpoll for arm64
Date: Wed, 9 Aug 2023 14:39:34 +0300 [thread overview]
Message-ID: <1691581193-8416-1-git-send-email-mihai.carabas@oracle.com> (raw)
This patchset enables the usage of haltpoll governer on arm64. This is
specifically interesting for KVM guests.
Here are some benchmarks without/with haltpoll for a KVM guest:
a) without haltpoll:
perf bench sched pipe
# Running 'sched/pipe' benchmark:
# Executed 1000000 pipe operations between two processes
Total time: 8.410 [sec]
8.410882 usecs/op
118893 ops/sec
b) with haltpoll:
perf bench sched pipe
# Running 'sched/pipe' benchmark:
# Executed 1000000 pipe operations between two processes
Total time: 5.183 [sec]
5.183491 usecs/op
192920 ops/sec
Joao Martins (7):
cpuidle-haltpoll: Make boot_option_idle_override check X86 specific
x86: Move ARCH_HAS_CPU_RELAX to arch
x86/kvm: Move haltpoll_want() to be arch defined
governors/haltpoll: Drop kvm_para_available() check
arm64: Select ARCH_HAS_CPU_RELAX
arm64: Define TIF_POLLING_NRFLAG
cpuidle-haltpoll: ARM64 support
arch/Kconfig | 3 +++
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/thread_info.h | 6 ++++++
arch/x86/Kconfig | 1 +
arch/x86/include/asm/cpuidle_haltpoll.h | 1 +
arch/x86/kernel/kvm.c | 6 ++++++
drivers/cpuidle/Kconfig | 4 ++--
drivers/cpuidle/cpuidle-haltpoll.c | 6 ++++--
drivers/cpuidle/governors/haltpoll.c | 5 +----
include/linux/cpuidle_haltpoll.h | 5 +++++
10 files changed, 30 insertions(+), 8 deletions(-)
--
1.8.3.1
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next reply other threads:[~2023-08-09 12:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-09 11:39 Mihai Carabas [this message]
2023-08-09 11:39 ` [PATCH 1/7] cpuidle-haltpoll: Make boot_option_idle_override check X86 specific Mihai Carabas
2023-08-10 19:22 ` Rafael J. Wysocki
2023-08-09 11:39 ` [PATCH 2/7] x86: Move ARCH_HAS_CPU_RELAX to arch Mihai Carabas
2023-08-09 11:39 ` [PATCH 3/7] x86/kvm: Move haltpoll_want() to be arch defined Mihai Carabas
2023-08-09 11:39 ` [PATCH 4/7] governors/haltpoll: Drop kvm_para_available() check Mihai Carabas
2023-08-10 19:25 ` Rafael J. Wysocki
2023-08-09 11:39 ` [PATCH 5/7] arm64: Select ARCH_HAS_CPU_RELAX Mihai Carabas
2023-08-09 13:49 ` Peter Zijlstra
2023-08-29 14:49 ` Russell King (Oracle)
2023-08-09 11:39 ` [PATCH 6/7] arm64: Define TIF_POLLING_NRFLAG Mihai Carabas
2023-08-09 11:39 ` [PATCH 7/7] cpuidle-haltpoll: ARM64 support Mihai Carabas
2023-08-09 13:48 ` [PATCH] Enable haltpoll for arm64 Peter Zijlstra
2023-08-29 14:31 ` Mihai Carabas
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