From: Stephen Hemminger <stephen@networkplumber.org>
To: "Morten Brørup" <mb@smartsharesystems.com>
Cc: "Mattias Rönnblom" <hofors@lysator.liu.se>,
dev@dpdk.org, "Bruce Richardson" <bruce.richardson@intel.com>,
"Konstantin Ananyev" <konstantin.v.ananyev@yandex.ru>,
"Jan Viktorin" <viktorin@rehivetech.com>,
"Ruifeng Wang" <ruifeng.wang@arm.com>,
"David Christensen" <drc@linux.vnet.ibm.com>,
"Stanislaw Kardach" <kda@semihalf.com>
Subject: Re: [RFC v2] non-temporal memcpy
Date: Tue, 9 Aug 2022 08:26:02 -0700 [thread overview]
Message-ID: <20220809082602.1fe5bd89@hermes.local> (raw)
In-Reply-To: <98CBD80474FA8B44BF855DF32C47DC35D87247@smartserver.smartshare.dk>
On Tue, 9 Aug 2022 11:46:19 +0200
Morten Brørup <mb@smartsharesystems.com> wrote:
> >
> > I don't think memcpy() functions should have alignment requirements.
> > That's not very practical, and violates the principle of least
> > surprise.
>
> I didn't make the CPUs with these alignment requirements.
>
> However, I will offer optimized performance in a generic NT memcpy() function in the cases where the individual alignment requirements of various CPUs happen to be met.
Rather than making a generic equivalent memcpy function, why not have
something which only takes aligned data. And to avoid user confusion
change the name to be something not suggestive of memcpy.
Maybe rte_non_cache_copy()?
Want to avoid the naive user just doing s/memcpy/rte_memcpy_nt/ and expect
everything to work.
next prev parent reply other threads:[~2022-08-09 15:26 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 15:26 Morten Brørup
2022-07-19 18:00 ` David Christensen
2022-07-19 18:41 ` Morten Brørup
2022-07-19 18:51 ` Stanisław Kardach
2022-07-19 22:15 ` Morten Brørup
2022-07-21 23:19 ` Konstantin Ananyev
2022-07-22 10:44 ` Morten Brørup
2022-07-24 13:35 ` Konstantin Ananyev
2022-07-24 22:18 ` Morten Brørup
2022-07-29 10:00 ` Konstantin Ananyev
2022-07-29 10:46 ` Morten Brørup
2022-07-29 11:50 ` Konstantin Ananyev
2022-07-29 17:17 ` Morten Brørup
2022-07-29 22:00 ` Konstantin Ananyev
2022-07-30 9:51 ` Morten Brørup
2022-08-02 9:05 ` Konstantin Ananyev
2022-07-29 12:13 ` Konstantin Ananyev
2022-07-29 16:05 ` Stephen Hemminger
2022-07-29 17:29 ` Morten Brørup
2022-08-07 20:40 ` Mattias Rönnblom
2022-08-09 9:24 ` Morten Brørup
2022-08-09 11:53 ` Mattias Rönnblom
2022-10-09 16:16 ` Morten Brørup
2022-07-29 18:13 ` Morten Brørup
2022-07-29 19:49 ` Konstantin Ananyev
2022-07-29 20:26 ` Morten Brørup
2022-07-29 21:34 ` Konstantin Ananyev
2022-08-07 20:20 ` Mattias Rönnblom
2022-08-09 9:34 ` Morten Brørup
2022-08-09 11:56 ` Mattias Rönnblom
2022-08-10 21:05 ` Honnappa Nagarahalli
2022-08-11 11:50 ` Mattias Rönnblom
2022-08-11 16:26 ` Honnappa Nagarahalli
2022-07-25 1:17 ` Honnappa Nagarahalli
2022-07-27 10:26 ` Morten Brørup
2022-07-27 17:37 ` Honnappa Nagarahalli
2022-07-27 18:49 ` Morten Brørup
2022-07-27 19:12 ` Stephen Hemminger
2022-07-28 9:00 ` Morten Brørup
2022-07-27 19:52 ` Honnappa Nagarahalli
2022-07-27 22:02 ` Stanisław Kardach
2022-07-28 10:51 ` Morten Brørup
2022-07-29 9:21 ` Konstantin Ananyev
2022-08-07 20:25 ` Mattias Rönnblom
2022-08-09 9:46 ` Morten Brørup
2022-08-09 12:05 ` Mattias Rönnblom
2022-08-09 15:00 ` Morten Brørup
2022-08-10 11:47 ` Mattias Rönnblom
2022-08-09 15:26 ` Stephen Hemminger [this message]
2022-08-09 17:24 ` Morten Brørup
2022-08-10 11:59 ` Mattias Rönnblom
2022-08-10 12:12 ` Morten Brørup
2022-08-10 11:55 ` Mattias Rönnblom
2022-08-10 12:18 ` Morten Brørup
2022-08-10 21:20 ` Honnappa Nagarahalli
2022-08-11 11:53 ` Mattias Rönnblom
2022-08-11 22:24 ` Honnappa Nagarahalli
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