From: "Sverdlin, Alexander (Nokia - DE/Ulm)" <alexander.sverdlin@nokia.com>
To: "x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "Sverdlin,
Alexander (Nokia - DE/Ulm)" <alexander.sverdlin@nokia.com>,
Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Vas Dias <jason.vas.dias@gmail.com>
Subject: [PATCH v3 0/2] x86/vdso: CLOCK_MONOTONIC_RAW implementation
Date: Wed, 5 Jun 2019 14:41:41 +0000 [thread overview]
Message-ID: <20190605144116.28553-1-alexander.sverdlin@nokia.com> (raw)
In-Reply-To: <CALCETrW6aE--Fo3qnK2zCAis5C-NraZtie4RBw59DVmzg5K_oA@mail.gmail.com>
From: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Trivial vDSO implementation saves a syscall and brings 700% performance
boost of clock_gettime(CLOCK_MONOTONIC_RAW, ...) call.
Changelog:
v3: Move mult and shift into struct vgtod_ts
v2: copy do_hres() into do_monotonic_raw()
Alexander Sverdlin (2):
x86/vdso: Move mult and shift into struct vgtod_ts
x86/vdso: implement clock_gettime(CLOCK_MONOTONIC_RAW, ...)
arch/x86/entry/vdso/vclock_gettime.c | 4 ++--
arch/x86/entry/vsyscall/vsyscall_gtod.c | 14 ++++++++++++--
arch/x86/include/asm/vgtod.h | 7 ++++---
3 files changed, 18 insertions(+), 7 deletions(-)
--
2.4.6
next prev parent reply other threads:[~2019-06-05 14:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 8:01 [PATCH] x86/vdso: implement clock_gettime(CLOCK_MONOTONIC_RAW, ...) Sverdlin, Alexander (Nokia - DE/Ulm)
2019-05-28 18:01 ` Thomas Gleixner
2019-06-04 16:42 ` [PATCH v2] " Sverdlin, Alexander (Nokia - DE/Ulm)
2019-06-04 17:39 ` Andy Lutomirski
2019-06-05 14:41 ` Sverdlin, Alexander (Nokia - DE/Ulm) [this message]
2019-06-05 14:41 ` [PATCH v3 1/2] x86/vdso: Move mult and shift into struct vgtod_ts Sverdlin, Alexander (Nokia - DE/Ulm)
2019-06-23 10:18 ` Thomas Gleixner
2019-06-24 9:16 ` Sverdlin, Alexander (Nokia - DE/Ulm)
2019-06-24 9:40 ` Thomas Gleixner
2019-06-27 12:00 ` Sverdlin, Alexander (Nokia - DE/Ulm)
2019-06-27 12:07 ` Thomas Gleixner
2019-06-27 12:15 ` Sverdlin, Alexander (Nokia - DE/Ulm)
2019-06-27 12:21 ` Thomas Gleixner
2019-06-05 14:41 ` [PATCH v3 2/2] x86/vdso: implement clock_gettime(CLOCK_MONOTONIC_RAW, ...) Sverdlin, Alexander (Nokia - DE/Ulm)
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