Messages in this thread | | | From | "Metzger, Markus T" <> | Date | Wed, 19 Nov 2008 12:14:45 +0000 | Subject | RE: debugctl msr |
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>-----Original Message----- >From: stephane eranian [mailto:eranian@googlemail.com] >Sent: Dienstag, 18. November 2008 23:01 >To: Markus Metzger >Cc: Metzger, Markus T; Ingo Molnar; Andi Kleen; Andrew Morton; >linux-kernel@vger.kernel.org >Subject: Re: debugctl msr >
>I think your definition for ds_cfg_64 is wrong. On Core, the PEBS >record ALWAYS includes r8-r15 even on >32 bits (zero filled). Also the DS_AREA has 9 fields, not 8. >Consequently, I think the structure should be defined >as follows: > >static const struct ds_configuration ds_cfg_64 = { > .sizeof_ds = 8 * 9,
You are right that there are 9 fields. However, the 9th field is double the size of the other fields and the entire structure is padded. The original code should read 8 * 12 to reflect that.
> .sizeof_field = 8, > .sizeof_rec[ds_bts] = 8 * 3, > .sizeof_rec[ds_pebs] = 8 * 18
You're right about the PEBS size.
I will send a patch some time this week.
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