Date: Sun, 14 Jun 1998 00:12:52 -0300 (EST) From: Joao Carlos Mendes Luis <jonny@jonny.eng.br> To: scsi@FreeBSD.ORG Subject: 100% interrupt time ? Message-ID: <199806140312.AAA26981@roma.coe.ufrj.br>
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Hi, I was checking a JAZ disk today, and noted that during a whole disk dd the time spent in interrupt mode (as told by top) was almost 100%. My machine is a PPro/200, and the Jaz is in it's own controller, aic0. Is this expected ? I know that the aic support is not perfect, as stated in it's sources, but in a dd with large block sizes the machine is almost unusable. Or is it a JAZ "feature" ? The jaz drive was at a 2940 controller at first, by I changed it because heavy usage in the jaz media made the whole system slower. At first I thought that the SCSI bus beeing busy with a non-disconectable device would slow all devices, including the system disks. Maybe I was wrong ? Jonny -- Joao Carlos Mendes Luis M.Sc. Student jonny@jonny.eng.br Universidade Federal do Rio de Janeiro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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