site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Hi all, Best regards, Allie _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Just a quick question! I'm running an app which is used for testing i/o. Right now, I'm running a thread at an elevated priority which does a lot of pread() calls. The app works fine but is a little slow & right now, I'm fine-tuning it. One issue, though; when I fire up BigTop, find my process and look at the system call throughput, I notice that it appears to be capped at 9000 calls/sec. I'm guessing this is being throttled by a kernel parameter. Is there any way this can be modified? I can understand why there is an upper limit on something like that, but I don't mind if my particular app/thread dominates the machine. The device I'm hitting is more than capable of beating that, so I'm definitely not saturating the driver. Thoughts / hints / ridicule welcome :-) This email sent to site_archiver@lists.apple.com