Where is op_model_mipsxx.c ?

Where is op_model_mipsxx.c ?

[David Daney]

I noticed this in the Makefile for the OProfile directory for mips:

oprofile-$(CONFIG_CPU_MIPS32_R1)                += op_model_mipsxx.o

The file op_model_mipsxx.c does not seem to exist.  Which implies to me 
that someone was working on making it work for MIPS32, but didn't quite 
finish.

I want to start hacking on OProfile for a MIPS32 based system and 
thought it might make a nice starting point.

If the missing file exists would its author mind making it available to me?

Thanks,
David Daney

Re: Where is op_model_mipsxx.c ?

[Ralf Baechle]

On Tue, Oct 04, 2005 at 09:11:06PM -0700, David Daney wrote:

> I noticed this in the Makefile for the OProfile directory for mips:
> 
> oprofile-$(CONFIG_CPU_MIPS32_R1)                += op_model_mipsxx.o
> 
> The file op_model_mipsxx.c does not seem to exist.  Which implies to me 
> that someone was working on making it work for MIPS32, but didn't quite 
> finish.
> 
> I want to start hacking on OProfile for a MIPS32 based system and 
> thought it might make a nice starting point.
> 
> If the missing file exists would its author mind making it available to me?

I've got oprofile support for MIPS32 / MIPS64 style counters in the queue.
It still needs some debugging to become actually useful but anyway, I'm
going to check those patches into git in a few minutes.

  Ralf

Re: Where is op_model_mipsxx.c ?

[Matej Kupljen]

Hi

> I've got oprofile support for MIPS32 / MIPS64 style counters in the queue.
> It still needs some debugging to become actually useful but anyway, I'm
> going to check those patches into git in a few minutes.

Can these be used on the AMD AU1200 core?
(I don't see Register 25 on Coprocessor 0)

If OProfile cannot be used, what can I use to profile the kernel?

BR,
Matej

Re: Where is op_model_mipsxx.c ?

[David Daney]

Matej Kupljen wrote:
> Hi
> 
> 
>>I've got oprofile support for MIPS32 / MIPS64 style counters in the queue.
>>It still needs some debugging to become actually useful but anyway, I'm
>>going to check those patches into git in a few minutes.
> 
> 
> Can these be used on the AMD AU1200 core?
> (I don't see Register 25 on Coprocessor 0)
> 
> If OProfile cannot be used, what can I use to profile the kernel?
> 

If there are no performance counters, OProfile can still use the system 
timer to take samples each clock tick.  This is the way I am using it.

To use it in this manner you have to hack up the code a bit so that the 
return value of oprofile_arch_init() (in oprofile/common.c) is -ENODEV.

David Daney.

Re: Where is op_model_mipsxx.c ?

[Matej Kupljen]

[-- Attachment #1: Type: text/plain, Size: 721 bytes --]

Hi

> If there are no performance counters, OProfile can still use the system 
> timer to take samples each clock tick.  This is the way I am using it.

Thanks for the info.

> To use it in this manner you have to hack up the code a bit so that the 
> return value of oprofile_arch_init() (in oprofile/common.c) is -ENODEV.

I'll try that and let you know the results.

I want to use the profiler, because the network performance of dbau1200
is very poor (with 2.6.14-rc2 and smc91x driver I get around 12Mbit/s!).

I check the traffic of netperf with ethereal and I see quite a lot
of duplicated packets (see the attached file with a few packets).
I think think this is also the reason that NFS is so slow.

BR,
Matej



[-- Attachment #2: netperf_dump.txt --]
[-- Type: text/plain, Size: 2621 bytes --]

No.     Time        Source                Destination           Protocol Info
     50 5.759336    172.18.1.53           172.18.1.57           TCP      37994 > 32772 [ACK] Seq=28961 Ack=1 Win=5840 Len=1448 TSV=111254184 TSER=2217426
     51 5.759342    172.18.1.53           172.18.1.57           TCP      37994 > 32772 [ACK] Seq=30409 Ack=1 Win=5840 Len=1448 TSV=111254184 TSER=2217426
     52 5.761884    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#1] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217427 TSER=111254176 SLE=17377 SRE=18825
     53 5.761894    172.18.1.53           172.18.1.57           TCP      37994 > 32772 [ACK] Seq=31857 Ack=1 Win=5840 Len=1448 TSV=111254186 TSER=2217427
     54 5.762052    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#2] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217429 TSER=111254176 SLE=17377 SRE=20273
     55 5.762063    172.18.1.53           172.18.1.57           TCP      [TCP Retransmission] 37994 > 32772 [ACK] Seq=14481 Ack=1 Win=5840 Len=1448 TSV=111254186 TSER=2217429
     56 5.762214    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#3] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217429 TSER=111254176 SLE=17377 SRE=21721
     57 5.762223    172.18.1.53           172.18.1.57           TCP      [TCP Retransmission] 37994 > 32772 [ACK] Seq=15929 Ack=1 Win=5840 Len=1448 TSV=111254187 TSER=2217429
     58 5.764745    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#4] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=17377 SRE=23169
     59 5.764754    172.18.1.53           172.18.1.57           TCP      37994 > 32772 [ACK] Seq=33305 Ack=1 Win=5840 Len=1448 TSV=111254189 TSER=2217432
     60 5.764911    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#5] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=26065 SRE=27513 SLE=17377 SRE=23169
     61 5.765074    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#6] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217432 TSER=111254176 SLE=26065 SRE=28961 SLE=17377 SRE=23169
     62 5.765083    172.18.1.53           172.18.1.57           TCP      [TCP Retransmission] 37994 > 32772 [PSH, ACK] Seq=23169 Ack=1 Win=5840 Len=1448 TSV=111254189 TSER=2217432
     63 5.766842    172.18.1.57           172.18.1.53           TCP      [TCP Dup ACK 49#7] 32772 > 37994 [ACK] Seq=1 Ack=14481 Win=34752 Len=0 TSV=2217434 TSER=111254176 SLE=26065 SRE=30409 SLE=17377 SRE=23169

Re: Where is op_model_mipsxx.c ?

[Ralf Baechle]

On Tue, Oct 25, 2005 at 01:25:59PM +0200, Matej Kupljen wrote:

> > I've got oprofile support for MIPS32 / MIPS64 style counters in the queue.
> > It still needs some debugging to become actually useful but anyway, I'm
> > going to check those patches into git in a few minutes.
> 
> Can these be used on the AMD AU1200 core?
> (I don't see Register 25 on Coprocessor 0)
> 
> If OProfile cannot be used, what can I use to profile the kernel?

You can still use oprofile in timer interrupt mode then.

  Ralf

RE: Where is op_model_mipsxx.c ?

[Mike C. Ward]

I created an op_model file for the r5K core in a MIPS32 kernel.
details are at
http://oss.pioneer-pra.com/oprofile/

I have not had a chance to test it on a real 2.6 kernel yet, it
was back-ported from 2.6.11 into 2.4.25.

Mike

> -----Original Message-----
> From: linux-mips-bounce@linux-mips.org 
> [mailto:linux-mips-bounce@linux-mips.org] On Behalf Of David Daney
> Sent: Tuesday, October 04, 2005 9:11 PM
> To: linux-mips@linux-mips.org
> Subject: Where is op_model_mipsxx.c ?
> 
> 
> I noticed this in the Makefile for the OProfile directory for mips:
> 
> oprofile-$(CONFIG_CPU_MIPS32_R1)                += op_model_mipsxx.o
> 
> The file op_model_mipsxx.c does not seem to exist.  Which 
> implies to me 
> that someone was working on making it work for MIPS32, but 
> didn't quite 
> finish.
> 
> I want to start hacking on OProfile for a MIPS32 based system and 
> thought it might make a nice starting point.
> 
> If the missing file exists would its author mind making it 
> available to me?
> 
> Thanks,
> David Daney
> 
> 

RE: Where is op_model_mipsxx.c ?

[Mike C. Ward]

I created an op_model file for the r5K core in a MIPS32 kernel.
details are at
http://oss.pioneer-pra.com/oprofile/

I have not had a chance to test it on a real 2.6 kernel yet, it
was back-ported from 2.6.11 into 2.4.25.

Mike

> -----Original Message-----
> From: linux-mips-bounce@linux-mips.org 
> [mailto:linux-mips-bounce@linux-mips.org] On Behalf Of David Daney
> Sent: Tuesday, October 04, 2005 9:11 PM
> To: linux-mips@linux-mips.org
> Subject: Where is op_model_mipsxx.c ?
> 
> 
> I noticed this in the Makefile for the OProfile directory for mips:
> 
> oprofile-$(CONFIG_CPU_MIPS32_R1)                += op_model_mipsxx.o
> 
> The file op_model_mipsxx.c does not seem to exist.  Which 
> implies to me 
> that someone was working on making it work for MIPS32, but 
> didn't quite 
> finish.
> 
> I want to start hacking on OProfile for a MIPS32 based system and 
> thought it might make a nice starting point.
> 
> If the missing file exists would its author mind making it 
> available to me?
> 
> Thanks,
> David Daney
> 
>