dunno why this didn't go here already... ----- Forwarded Message ----- From: "Matt W. Benjamin" <[email protected]> To: "Benjamin Kaduk" <[email protected]> Cc: [email protected], "Garrett Wollman" <[email protected]> Sent: Thursday, March 31, 2011 9:50:00 PM Subject: Re: [OpenAFS-port-freebsd] Client deadlock?
Hi, I'm embarrassed to say that I saw write stalls a good while back, just moving a large file into a constrained cache--but didn't have time to approach it. Bonnie is a complex workload--it would be attractive to find the simplest workload that can reproduce...I would try just moving large object in a small-memory vm. Regards, Matt ----- "Benjamin Kaduk" <[email protected]> wrote: > On Thu, 31 Mar 2011, Garrett Wollman wrote: > > > > > It turns out that even dd(1) hangs it nearly immediately: > > > > $ dd if=/dev/zero of=test bs=64k count=1048576 > > load: 0.04 cmd: dd 7375 [afsslp] 17.63r 0.01u 0.45s 0% 1088k > > load: 0.03 cmd: dd 7375 [afsslp] 21.97r 0.01u 0.45s 0% 1088k > > Assuming I can do math correctly, that's creating a 64G file; it looks > > like bonnie++ by default will use something like a 2G test file. > Since > your cache is roughly 1.5G, I am going to go out on a limb and surmise > > that write-on-close() is working okay but earlier writes due to cache > > starvation are not. > > Which is kind of unfortunate. > > -Ben Kaduk > _______________________________________________ > port-freebsd mailing list > [email protected] > https://lists.openafs.org/mailman/listinfo/port-freebsd -- Matt Benjamin The Linux Box 206 South Fifth Ave. Suite 150 Ann Arbor, MI 48104 http://linuxbox.com tel. 734-761-4689 fax. 734-769-8938 cel. 734-216-5309 _______________________________________________ port-freebsd mailing list [email protected] https://lists.openafs.org/mailman/listinfo/port-freebsd -- Matt Benjamin The Linux Box 206 South Fifth Ave. Suite 150 Ann Arbor, MI 48104 http://linuxbox.com tel. 734-761-4689 fax. 734-769-8938 cel. 734-216-5309 _______________________________________________ OpenAFS-devel mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-devel
