From: Christian Ehrhardt <christian.ehrhardt@canonical.com>
To: Luca Boccassi <bluca@debian.org>, dev <dev@dpdk.org>,
Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [dpdk-dev] [PATCH v3] build: establish an invariant machine type
Date: Wed, 14 Nov 2018 20:39:06 +0100 [thread overview]
Message-ID: <CAATJJ0JD_5UnBERw_PjYFKHjCGhWF+4-1gDa8e2xDvjY+mVSAQ@mail.gmail.com> (raw)
In-Reply-To: <20181114143315.2695-1-christian.ehrhardt@canonical.com>
On Wed, Nov 14, 2018 at 3:33 PM Christian Ehrhardt
<christian.ehrhardt@canonical.com> wrote:
>
> Add the machine definition 'default' which is special compared
> to 'native' (most optimized for current system) or any explicit
> type (external entity has to decide on the type).
>
> It defaults to the per arch agreed common minimal baseline
> needed for DPDK to reasonable work.
>
> That might not be the most optimized, but the most portable
> version while still being able to support the CPU features
> required for DPDK.
>
> Going forward this can be bumped up by the DPDK project, but it
> can never be an invariant like 'native'.
>
> Distributions and other needing portable code are expected to
> define the machine as 'default'.
>
> Changes in v2:
> - fixed the non 64 bit arm default type
> - changed baseline to default to match the old build system
>
> Changes in v3:
> - add acked-by's
> - removed old wording from commit message
> - adding Fixes line per request by Luca Boccassi
FYI: I'll drop the version update from the commit (I didn't have a
cover letter to add them instead).
Also I'll add the Acked-by of Luca to the other patch as well and move
the Fixes line as it was meant for the 1/2 of these.
Overall I think v4 will then be fine, all acks in place and hopefully
making it in before -rc4 is defined to fix more peoples builds.
Replying to this mail with both updated patches soon, let me know if
anything else is holding these back from being accepted.
> Fixes: 54d609a13876 ("build: add ppc64 meson build")
>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> Acked-by: Luca Boccassi <bluca@debian.org>
> Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
> ---
> config/meson.build | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/config/meson.build b/config/meson.build
> index 1af305f46..db32499b3 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -7,6 +7,27 @@ if meson.is_cross_build()
> else
> machine = get_option('machine')
> endif
> +
> +# machine type 'default' is special, it defaults to the per arch agreed common
> +# minimal baseline needed for DPDK.
> +# That might not be the most optimized, but the most portable version while
> +# still being able to support the CPU features required for DPDK.
> +# This can be bumped up by the DPDK project, but it can never be an
> +# invariant like 'native'
> +if machine == 'default'
> + if host_machine.cpu_family().startswith('x86')
> + # matches the old pre-meson build systems default
> + machine = 'corei7'
> + elif host_machine.cpu_family().startswith('arm')
> + machine = 'armv7-a'
> + elif host_machine.cpu_family().startswith('aarch')
> + # arm64 manages defaults in config/arm/meson.build
> + machine = 'default'
> + elif host_machine.cpu_family().startswith('ppc')
> + machine = 'power8'
> + endif
> +endif
> +
> dpdk_conf.set('RTE_MACHINE', machine)
> machine_args = []
>
> --
> 2.17.1
>
--
Christian Ehrhardt
Software Engineer, Ubuntu Server
Canonical Ltd
next prev parent reply other threads:[~2018-11-14 19:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-14 11:34 [dpdk-dev] [PATCH 1/2] build: avoid non supported -march on ppc (meson) Christian Ehrhardt
2018-11-14 11:34 ` [dpdk-dev] [PATCH 2/2] build: establish an invariant machine type Christian Ehrhardt
2018-11-14 11:40 ` Luca Boccassi
2018-11-14 11:52 ` Bruce Richardson
2018-11-14 12:05 ` Luca Boccassi
2018-11-14 13:09 ` Christian Ehrhardt
2018-11-14 13:18 ` [dpdk-dev] [PATCH] " Christian Ehrhardt
2018-11-14 13:54 ` Bruce Richardson
2018-11-14 14:33 ` [dpdk-dev] [PATCH v3] " Christian Ehrhardt
2018-11-14 19:39 ` Christian Ehrhardt [this message]
2018-11-18 13:24 ` Thomas Monjalon
2018-11-14 19:40 ` [dpdk-dev] [PATCH v4 1/2] build: avoid non supported -march on ppc (meson) Christian Ehrhardt
2018-11-14 19:40 ` [dpdk-dev] [PATCH v4 2/2] build: establish an invariant machine type Christian Ehrhardt
2018-11-18 14:24 ` [dpdk-dev] [PATCH v4 1/2] build: avoid non supported -march on ppc (meson) Thomas Monjalon
2018-11-14 13:06 ` [dpdk-dev] [PATCH 2/2] build: establish an invariant machine type Luca Boccassi
2018-11-14 13:08 ` Christian Ehrhardt
2018-11-14 11:39 ` [dpdk-dev] [PATCH 1/2] build: avoid non supported -march on ppc (meson) Luca Boccassi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAATJJ0JD_5UnBERw_PjYFKHjCGhWF+4-1gDa8e2xDvjY+mVSAQ@mail.gmail.com \
--to=christian.ehrhardt@canonical.com \
--cc=bluca@debian.org \
--cc=bruce.richardson@intel.com \
--cc=dev@dpdk.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).