From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Pashupati Kumar <kumarp@brocade.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Bit spinlocks in DPDK
Date: Fri, 06 Dec 2013 23:24:27 +0100 [thread overview]
Message-ID: <4656219.tgqzelRNOJ@x220> (raw)
In-Reply-To: <6895EAE0CA8DEE40B92D7CA88BB521F332BA572E7A@HQ1-EXCH02.corp.brocade.com>
06/12/2013 14:12, Pashupati Kumar :
> From: Thomas Monjalon
> > 06/12/2013 13:04, Pashupati Kumar :
> > > We use bit spinlocks extensively to have compact data structures. Are
> > > there any plans for adding them to DPDK in some future release?
> >
> > Not sure to understand your request.
> > Are you looking for that?
> > http://dpdk.org/doc/api/rte__spinlock_8h.html
>
> I am looking for spinlocks that use a single bit (bit 31) of a 32 bit word
> for locking. The rest of the bits in the word are left undisturbed. This
> enables more compact data structures as only 1 bit is consumed for the
> lock.
Oh yes, like test_and_set_bit_lock() in Linux:
http://lxr.free-electrons.com/source/arch/ia64/include/asm/bitops.h?v=3.12#L205
I think that a patch would be appreciated :)
PS: please try to answer below the question. It's far easier to read.
--
Thomas
next prev parent reply other threads:[~2013-12-06 22:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-06 21:04 Pashupati Kumar
2013-12-06 22:02 ` Thomas Monjalon
2013-12-06 22:12 ` Pashupati Kumar
2013-12-06 22:24 ` Thomas Monjalon [this message]
2013-12-06 22:54 ` Pashupati Kumar
2013-12-07 17:54 ` François-Frédéric Ozog
2013-12-19 16:41 ` Thomas Monjalon
2013-12-20 15:39 ` Thomas Monjalon
2013-12-20 16:00 ` François-Frédéric Ozog
2013-12-20 16:36 ` Stephen Hemminger
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