Date: Sat, 10 May 2003 08:40:21 -0700 From: Lars Eggert <larse@ISI.EDU> To: Paul Richards <paul@freebsd-services.com> Cc: current@freebsd.org Subject: Re: Interrupt latency problems Message-ID: <3EBD1D65.1060104@isi.edu> In-Reply-To: <1052570246.27195.6.camel@cf.freebsd-services.com> References: <1052570246.27195.6.camel@cf.freebsd-services.com>
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This is a cryptographically signed message in MIME format. --------------ms030404050308060908070708 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit On 5/10/2003 5:37 AM, Paul Richards wrote: > > I'm having real problems with current with heavy disk activity. > > When working in X and updating ports which causes a lot of disk activity > I get *very* poor interactive responses. Keypresses can not appear for > seconds and mouse movement is very jerky and unresponsive. > > I'm wondering if something is holding locks a long time in interrupt > handlers and causing mouse/keyboard interrupts to be lost? > > Since this is caused by heavy disk activity then my first guess would be > the ATA driver. > > Is anyone else seeing anything like this? I do, but with SCSI disks and on an SMP box. So I doubt it's the ATA subsystem alone. Lars -- Lars Eggert <larse@isi.edu> USC Information Sciences Institute --------------ms030404050308060908070708 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJtjCC AzgwggKhoAMCAQICEGZFcrfMdPXPY3ZFhNAukQEwDQYJKoZIhvcNAQEEBQAwgdExCzAJBgNV BAYTAlpBMRUwEwYDVQQIEwxXZXN0ZXJuIENhcGUxEjAQBgNVBAcTCUNhcGUgVG93bjEaMBgG A1UEChMRVGhhd3RlIENvbnN1bHRpbmcxKDAmBgNVBAsTH0NlcnRpZmljYXRpb24gU2Vydmlj ZXMgRGl2aXNpb24xJDAiBgNVBAMTG1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBDQTErMCkG CSqGSIb3DQEJARYccGVyc29uYWwtZnJlZW1haWxAdGhhd3RlLmNvbTAeFw0wMDA4MzAwMDAw MDBaFw0wNDA4MjcyMzU5NTlaMIGSMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBD YXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xDzANBgNVBAoTBlRoYXd0ZTEdMBsGA1UECxMUQ2Vy dGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNvbmFsIEZyZWVtYWlsIFJTQSAyMDAw 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