From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailserv2.iuinc.com (IDENT:qmailr@mailserv2.iuinc.com [206.245.164.55]) by puffin.external.hp.com (8.9.3/8.9.3) with SMTP id MAA05962 for ; Fri, 11 Feb 2000 12:58:36 -0700 Received: from hpdst41.cup.hp.com (hpdst41.cup.hp.com [15.16.128.62]) by atlrel1.hp.com (Postfix) with ESMTP id 9EE781A9A7 for ; Fri, 11 Feb 2000 13:53:30 -0500 (EST) Received: from cup.hp.com (hpdst231.cup.hp.com [15.16.129.192]) by hpdst41.cup.hp.com with ESMTP (8.8.6 (PHNE_17190)/8.7.3 TIS 5.0.1) id KAA25689 for ; Fri, 11 Feb 2000 10:53:29 -0800 (PST) Message-ID: <38A45AE4.EF2A67AB@cup.hp.com> Date: Fri, 11 Feb 2000 10:54:29 -0800 From: Ullas Ponnadi MIME-Version: 1.0 To: parisc-linux@thepuffingroup.com References: <38A0B5CB.DCF1C486@cup.hp.com> Content-Type: text/plain; charset=us-ascii Subject: [parisc-linux] Timer Interrupt and Scheduler List-ID: I would like to expand my observations a little bit more with regards to the timer interrupt and the scheduler. Looking at the linux documentation available and the code for the x86 and alpha architectures, at the very end of a return from the timer interrupt, a call to the scheduler should be made, if necessary. I see this call in the ret_from_intr label in entry.S file on the x86 architecture and ret_from_sys_call in entry.S on the alpha architecture. The parisc interrupt handler does not seem to be doing any such thing. ( Looking at the linux-2_3_29-20000208_tar archive ). Could someone help me understand how the scheduler would get called when a timer interrupt occurs? Thanks, Ullas Ullas Ponnadi wrote: > Could someone give me more insight into how the scheduler would get > called > when a timer interrupt happens? I tried tracing through the code > handling the > external interrupt and am at a loss trying to figure out this part. > > Thanks, > > Ullas Ponnadi