linux-kernel - Re: [PATCH] perf/x86/intel/uncore: Fix the lack of ch

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Message-ID: <4f1b0d01deaaf0a2cb3930679868453c3be1ed5f.camel@intel.com>
Date: Tue, 7 Jan 2025 17:12:41 +0000
From: "Falcon, Thomas" <thomas.falcon@...el.com>
To: "peterz@...radead.org" <peterz@...radead.org>, "acme@...nel.org"
	<acme@...nel.org>, "renyu.zj@...ux.alibaba.com" <renyu.zj@...ux.alibaba.com>,
	"kan.liang@...ux.intel.com" <kan.liang@...ux.intel.com>, "irogers@...gle.com"
	<irogers@...gle.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
	"xueshuai@...ux.alibaba.com" <xueshuai@...ux.alibaba.com>
Subject: Re: [PATCH] perf/x86/intel/uncore: Fix the lack of ch_mask format for
 SPR

On Tue, 2025-01-07 at 09:55 +0800, Jing Zhang wrote:
> 
> 
> 在 2025/1/6 下午9:44, Liang, Kan 写道:
> > 
> > 
> > On 2025-01-05 9:16 p.m., Jing Zhang wrote:
> > > 
> > > 
> > > 在 2025/1/3 上午3:02, Liang, Kan 写道:
> > > > 
> > > > 
> > > > On 2024-12-30 2:11 a.m., Jing Zhang wrote:
> > > > > perf stat errors out with
> > > > > UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL event
> > > > > because of lack of ch_mask format in drivers, and perf test
> > > > > "104: perf
> > > > > all PMU test (exclusive)" failed.
> > > > > 
> > > > > $perf stat -e perf stat -e
> > > > > UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL
> > > > > sleep 1
> > > > > 
> > > > > Initial error:
> > > > > event syntax error:
> > > > > 'UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL'
> > > > >                                 \___ unknown term 'ch_mask'
> > > > > for pmu 'uncore_cha_0'
> > > > > 
> > > > > 104: perf all PMU test
> > > > > (exclusive)                                   : FAILED!
> > > > > 
> > > > > Add ch_mask format for SPR to fix it.
> > > > > 
> > > > 
> > > > I don't think there is a ch_mask. It should be extended umask.
> > > > The issue of the CHA extended umask should has been fixed by
> > > > https://lore.kernel.org/lkml/172052531679.2215.16140288595428337453.tip-bot2@tip-bot2/
> > > > 
> > > 
> > > I think it is not the same issue. I have this patch but still
> > > error.
> > > 
> > > in "tools/perf/pmu-events/arch/x86/sapphirerapids/uncore-
> > > cache.json",
> > > the event "UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL" is described
> > > as:
> > > {
> > >         "BriefDescription":
> > > "UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL",
> > >         "Counter": "0,1,2,3",
> > >         "EventCode": "0x35",
> > >         "EventName": "UNC_CHA_TOR_INSERTS.IA_HIT_CXL_ACC_LOCAL",
> > >         "Experimental": "1",
> > >         "PerPkg": "1",
> > >         "PortMask": "0x000",
> > >         "UMask": "0x10c0008101",
> > >         "Unit": "CHA"
> > > },
> > > 
> > > the PortMask is ch_mask, but driver not output ch_mask on SPR, it
> > > causes error.
> > 
> > There is no ch_mask on SPR. It should be Extended Umask.
> > The convertor tool should avoid generating the PortMask and FCMask
> > for
> > SPR/EMR/GNR.
> 
> Oh, I see. Maybe the event description is inaccurate.
> 
> Thanks,
> Jing
> 
> > 
> > + Thomas
> > 
> > Could you please take a look? We may have to re-generate the event
> > list.

Jing, could you please retest with the latest perf-tools-next:

https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/?h=perf-tools-next

and with this patch series applied:
https://lore.kernel.org/lkml/20241209222800.296000-1-irogers@google.com/

Please let us know if that resolves the issue for you.

Thanks,
Tom

> > 
> > Thanks,
> > Kan
> > 
> > > 
> > > Thanks,
> > > Jing
> > > 
> > > > Thanks,
> > > > Kan
> > > 
> > > 
> > > 
> > > 
> > > > > Fixes: 949b11381f81 ("perf/x86/intel/uncore: Add Sapphire
> > > > > Rapids server CHA support")
> > > > > Signed-off-by: Jing Zhang <renyu.zj@...ux.alibaba.com>
> > > > > ---
> > > > >  arch/x86/events/intel/uncore_snbep.c | 1 +
> > > > >  1 file changed, 1 insertion(+)
> > > > > 
> > > > > diff --git a/arch/x86/events/intel/uncore_snbep.c
> > > > > b/arch/x86/events/intel/uncore_snbep.c
> > > > > index ca98744..e537623 100644
> > > > > --- a/arch/x86/events/intel/uncore_snbep.c
> > > > > +++ b/arch/x86/events/intel/uncore_snbep.c
> > > > > @@ -5967,6 +5967,7 @@ static int spr_cha_hw_config(struct
> > > > > intel_uncore_box *box, struct perf_event *ev
> > > > >  	&format_attr_inv.attr,
> > > > >  	&format_attr_thresh8.attr,
> > > > >  	&format_attr_filter_tid5.attr,
> > > > > +	&format_attr_ch_mask.attr,
> > > > >  	NULL,
> > > > >  };
> > > > >  static const struct attribute_group
> > > > > spr_uncore_chabox_format_group = {
> > > 
> >