linux-kernel - scheduling oddity on 2.6.20.3 stock

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]

Date:	Wed, 2 May 2007 18:31:21 -0700 (PDT)
From:	david@...g.hm
To:	linux-kernel@...r.kernel.org
Subject: scheduling oddity on 2.6.20.3 stock

I needed to recompress some files from .bz2 to .gz so I setup a script to 
do

bunzip2 -c $file.bz2 |gzip -9 >$file.gz

I expected that the two CPU heavy processes would end up on different 
cpu's and spend a little time shuffling data between the two cpu's on a 
system (dual core opteron)

however, instead what I find is that each process is getting 50% of one 
cpu while the other cpu is 97% idle.

David Lang
-
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/