From: Thomas Gleixner <tglx@linutronix.de>
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
dima@arista.com, avagin@gmail.com, arnd@arndb.de,
vincenzo.frascino@arm.com, luto@kernel.org,
linux-arch@vger.kernel.org
Subject: Re: [PATCH RESEND v1 1/4] lib/vdso: Mark do_hres_timens() and do_coarse_timens() __always_inline()
Date: Mon, 12 Apr 2021 14:47:49 +0200 [thread overview]
Message-ID: <87r1jf1xfu.ffs@nanos.tec.linutronix.de> (raw)
In-Reply-To: <90dcf45ebadfd5a07f24241551c62f619d1cb930.1617209142.git.christophe.leroy@csgroup.eu>
On Wed, Mar 31 2021 at 16:48, Christophe Leroy wrote:
> In the same spirit as commit c966533f8c6c ("lib/vdso: Mark do_hres()
> and do_coarse() as __always_inline"), mark do_hres_timens() and
> do_coarse_timens() __always_inline.
>
> The measurement below in on a non timens process, ie on the fastest path.
>
> On powerpc32, without the patch:
>
> clock-gettime-monotonic-raw: vdso: 1155 nsec/call
> clock-gettime-monotonic-coarse: vdso: 813 nsec/call
> clock-gettime-monotonic: vdso: 1076 nsec/call
>
> With the patch:
>
> clock-gettime-monotonic-raw: vdso: 1100 nsec/call
> clock-gettime-monotonic-coarse: vdso: 667 nsec/call
> clock-gettime-monotonic: vdso: 1025 nsec/call
>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-arch@vger.kernel.org, arnd@arndb.de, dima@arista.com,
linux-kernel@vger.kernel.org, avagin@gmail.com, luto@kernel.org,
vincenzo.frascino@arm.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH RESEND v1 1/4] lib/vdso: Mark do_hres_timens() and do_coarse_timens() __always_inline()
Date: Mon, 12 Apr 2021 14:47:49 +0200 [thread overview]
Message-ID: <87r1jf1xfu.ffs@nanos.tec.linutronix.de> (raw)
In-Reply-To: <90dcf45ebadfd5a07f24241551c62f619d1cb930.1617209142.git.christophe.leroy@csgroup.eu>
On Wed, Mar 31 2021 at 16:48, Christophe Leroy wrote:
> In the same spirit as commit c966533f8c6c ("lib/vdso: Mark do_hres()
> and do_coarse() as __always_inline"), mark do_hres_timens() and
> do_coarse_timens() __always_inline.
>
> The measurement below in on a non timens process, ie on the fastest path.
>
> On powerpc32, without the patch:
>
> clock-gettime-monotonic-raw: vdso: 1155 nsec/call
> clock-gettime-monotonic-coarse: vdso: 813 nsec/call
> clock-gettime-monotonic: vdso: 1076 nsec/call
>
> With the patch:
>
> clock-gettime-monotonic-raw: vdso: 1100 nsec/call
> clock-gettime-monotonic-coarse: vdso: 667 nsec/call
> clock-gettime-monotonic: vdso: 1025 nsec/call
>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2021-04-12 12:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 16:48 [PATCH RESEND v1 0/4] powerpc/vdso: Add support for time namespaces Christophe Leroy
2021-03-31 16:48 ` Christophe Leroy
2021-03-31 16:48 ` [PATCH RESEND v1 1/4] lib/vdso: Mark do_hres_timens() and do_coarse_timens() __always_inline() Christophe Leroy
2021-03-31 16:48 ` Christophe Leroy
2021-04-12 12:47 ` Thomas Gleixner [this message]
2021-04-12 12:47 ` Thomas Gleixner
2021-04-12 12:54 ` Vincenzo Frascino
2021-04-12 12:54 ` Vincenzo Frascino
2021-03-31 16:48 ` [PATCH RESEND v1 2/4] lib/vdso: Add vdso_data pointer as input to __arch_get_timens_vdso_data() Christophe Leroy
2021-03-31 16:48 ` Christophe Leroy
2021-04-05 5:00 ` Andrei Vagin
2021-04-05 5:00 ` Andrei Vagin
2021-04-12 12:48 ` Thomas Gleixner
2021-04-12 12:48 ` Thomas Gleixner
2021-04-12 12:56 ` Vincenzo Frascino
2021-04-12 12:56 ` Vincenzo Frascino
2021-03-31 16:48 ` [PATCH RESEND v1 3/4] powerpc/vdso: Separate vvar vma from vdso Christophe Leroy
2021-03-31 16:48 ` Christophe Leroy
2021-04-05 5:03 ` Andrei Vagin
2021-04-05 5:03 ` Andrei Vagin
2021-04-12 12:58 ` Vincenzo Frascino
2021-04-12 12:58 ` Vincenzo Frascino
2021-03-31 16:48 ` [PATCH RESEND v1 4/4] powerpc/vdso: Add support for time namespaces Christophe Leroy
2021-03-31 16:48 ` Christophe Leroy
2021-04-05 4:50 ` Andrei Vagin
2021-04-05 4:50 ` Andrei Vagin
2021-04-12 13:00 ` Vincenzo Frascino
2021-04-12 13:00 ` Vincenzo Frascino
2021-04-12 12:49 ` [PATCH RESEND v1 0/4] " Thomas Gleixner
2021-04-12 12:49 ` Thomas Gleixner
2021-04-13 6:31 ` Michael Ellerman
2021-04-13 6:31 ` Michael Ellerman
2021-04-19 4:00 ` Michael Ellerman
2021-04-19 4:00 ` Michael Ellerman
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