linux-kernel - 2.6.19-rt14 slowdown compared to 2.6.19

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <9D2C22909C6E774EBFB8B5583AE5291C0199950A@fmsmsx414.amr.corp.intel.com>
Date:	Fri, 22 Dec 2006 13:39:15 -0800
From:	"Chen, Tim C" <tim.c.chen@...el.com>
To:	<mingo@...e.hu>
Cc:	<linux-kernel@...r.kernel.org>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
Subject: 2.6.19-rt14 slowdown compared to 2.6.19

Ingo,

We did some benchmarking on 2.6.19-rt14, compared it with 2.6.19 
kernel and noticed several slowdowns.  The test machine is a 2 socket
woodcrest machine with your default configuration.

Netperf TCP Streaming was slower by 40% ( 1 server and 1 client 
each bound to separate cpu cores on different socket, network
loopback mode was used).  

Volanomark was slower by 80% (Server and Clients communicate with 
network loopback mode. Idle time goes from 1% to 60%)

Re-Aim7 was slower by 40% (idle time goes from 0% to 20%)

Wonder if you have any suggestions on what could cause the slowdown.  
We've tried disabling CONFIG_NO_HZ and it didn't help much.

Thanks.

Tim
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/