interrupt numbers

["Terry Tree" <terry.tree@xxxxxxxxx>]

Anyone know where DragonFly stands in this regard ?

-Terry

From: Paolo Pisati <p.pisati@xxxxxxxxxxxxxx>
Message-ID: <20060405003358.GA83600@xxxxxx>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4.2.1i
X-Virus-Scanned: by amavisd-new-20030616-p10 (Debian) at krisma.oltrelinux.com
Subject: Interesting data on network interrupt - part II
X-BeenThere: freebsd-current@xxxxxxxxxxx
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@xxxxxxxxxxx?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@xxxxxxxxxxx>
List-Help: <mailto:freebsd-current-request@xxxxxxxxxxx?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@xxxxxxxxxxx?subject=subscribe>
Sender: owner-freebsd-current@xxxxxxxxxxx
Errors-To: owner-freebsd-current@xxxxxxxxxxx

Hi,

i updated my work on interrupt profiling with sone new
experiments.

In total we have now:

-FreeBSD 4 PIC (no asm part)
-FreeBSD 7 APIC
-FreeBSD 7 PIC
-FreeBSD 7 PREE APIC
-FreeBSD 7 APIC JHB

Some quick comments:

-PIC is much slower in masking interrupt (7k in PIC vs 3k in APIC)
-PREE let new thread save less than 500 ticks of 'queue' while
 preempted threads are often resumed after a lot
-JHB patch shaved 2.5k ticks in interrupt masking op

For graphs, data and more comments:

http://mercurio.sm.dsi.unimi.it/~pisati/interrupt/

bye
--

Paolo

"le influenze esterne sono troppe, il mondo reale non e' mica
quello fatato dei komunisti :-p" - Anonymous Lumbard