public inbox for linuxppc-dev@ozlabs.org 
 help / color / mirror / Atom feed

From: "0x0000" <0x0000@163•com>
To: "linuxppc-dev" <linuxppc-dev@ozlabs•org>
Subject: some questions about the implementation of oprofile of mpc8560 in linux kernel source code
Date: Mon, 11 May 2009 20:36:58 +0800	[thread overview]
Message-ID: <200905112036570173816@163.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 1440 bytes --]

Dear All,

I am a user of oprofile. When I use oprofile, I find some problems. Could you please help me? 

I have some questions about the open source code of the implementation of oprofile in linux 
kernel 2.6.26, which is presented op_model_fsl_emb.c, and the path in linux kernel source 
tree is arch/powerpc/oprofile/op_model_fsl_emb.c. 

To present this question more clearly, It needs the following steps: 

1> I give some cpu event and its counter values, which finally will call the function fsl_emb_reg_setup 

2> I execute setup, which finally will call the function fsl_emb_cpu_setup 

3> I execute start, which finally will call the function fsl_emb_start 

4> After calling start, the MPC8560 CPU will continuing increasing the PMCn value until its value reach 
0x80000000. Basing on what metioned in E500CORERM.pdf, this value should cause a exception, and 
should goto the interrupt routine:fsl_emb_handle_interrupt. 
But in fact, It never goto this interrupt routine! It always cause a reboot without any information! 

But while we using MPC7450 CPU, this situation never happened, it works well. 


Basing on the information metioned above, my questions are: 
1> Is there any bug in op_model_fsl_emb.c and its related source code? 
2> If possible, could you please tell me what the reason it is? And How to use op_model_fsl_emb.c correctly? 


Any feedback is appreciated! 

Thanks & regards 
Jike

2009-05-11 



0x0000 

[-- Attachment #2: Type: text/html, Size: 2586 bytes --]

                 reply	other threads:[~2009-05-11 12:52 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200905112036570173816@163.com \
    --to=0x0000@163$(echo .)com \
    --cc=linuxppc-dev@ozlabs$(echo .)org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox