Re: [ANNOUNCE] 3.4.9-rt17

From: Tim Sander
Date: Fri Aug 24 2012 - 04:32:25 EST


Hi

After fixing the realtime prios which got shuffled due to other irq thread names
I just tested the realtime latency for interrupts on the i.mx35. With our own
systemtimer which does not get into the way of the measurement interrupt this
kernel has 30µs worst time (caveat: short measurement period) interrupt
latency and usermode can keep up with a 2400kHz interrupt rate. While the
usermode performance seems to be largely unchanged (but i haven't tested very
thoroughly) the interrupt latency went down about 10µs coming from the 3.0-rt
series. Its really nice to see that kind of improvement.

Thanks
Tim

Ignore the legalese please:


Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhorst | Aufsichtsratsvorsitzender: James Charles Webster

The information in this email is confidential. It is intended solely for the addressee. If you are not the intended recipient, please let me know and delete this email.

Die in dieser E-Mail enthaltene Information ist vertraulich und lediglich für den Empfaenger bestimmt. Sollten Sie nicht der eigentliche Empfaenger sein, informieren Sie mich bitte kurz und loeschen diese E-Mail.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/