Re: IOLog on serial port? Or to use kprintf?
site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jan 22, 2005, at 21:22 Uhr, Justin Walker wrote: thanks for the info, Justin! iD8DBQFB87kaDTGb09msdNARAnGZAJ46XQT9a26Pqd5sECfUQH7d18USNgCdFaBG E5M+xYM4cpwZANUcC+2gjsg= =/t/c -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... FYI, if you do succeed in getting kprintf output directed to a serial port (cf. mail from Markus and Felix in this thread), be aware that using it will noticeably degrade the performance of your system (the last I looked, kprintf() uses polling to output to its device, and for serial, that means "forever" with interrupts disabled). The last time I used kprintf to serial posts (when I was young, and there was Rhapsody in the air), it degraded the performance of the ethernet driver/network stack by about 90% (I was debugging the stack). felix - -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 http://fkr.hazardous.org | http://opendarwin.org/~fkr/ | FKR-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) This email sent to site_archiver@lists.apple.com
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Felix Kronlage