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From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/3] arm64: perf: add support for Cortex-A55/A75/A76
Date: Mon, 6 Jul 2020 16:04:11 +0800	[thread overview]
Message-ID: <20200706160411.19d91904@xhacker.debian> (raw)
In-Reply-To: <20200703123346.GB18953@willie-the-truck>

Hi Will,

On Fri, 3 Jul 2020 13:33:47 +0100 Will Deacon wrote:

> 
> 
> On Fri, Jun 19, 2020 at 06:44:37PM +0800, Jisheng Zhang wrote:
> > The Cortex-A55/A75/A76 use some implementation defined perf events.
> > Add the support.
> >
> > Jisheng Zhang (3):
> >   arm64: perf: add support for Cortex-A55
> >   arm64: perf: add support for Cortex-A75
> >   arm64: perf: add support for Cortex-A76
> >
> >  arch/arm64/kernel/perf_event.c | 49 +++++++++++++++++++++++++++++++---
> >  1 file changed, 45 insertions(+), 4 deletions(-)  
> 
> Do we really need this? I'd prefer for this stuff to live in userspace

IMHO, this stuff is to add a relationship between linux standard
HW events and ARM PMU events, take CA55 for example:

w/o the stuff, perf -e PREFETCH_LINEFILL

w/ the stuff, perf -e L1-dcache-prefetch-misses

But indeed, we also need to add json descriptions in perf tool, I'll submit
patches.

Thanks

> now that the perf tool has supported JSON event descriptions for a while,
> and the in-kernel driver advertises the architected events advertised
> by PMCEID*.
> 
> Will


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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] arm64: perf: add support for Cortex-A55/A75/A76
Date: Mon, 6 Jul 2020 16:04:11 +0800	[thread overview]
Message-ID: <20200706160411.19d91904@xhacker.debian> (raw)
In-Reply-To: <20200703123346.GB18953@willie-the-truck>

Hi Will,

On Fri, 3 Jul 2020 13:33:47 +0100 Will Deacon wrote:

> 
> 
> On Fri, Jun 19, 2020 at 06:44:37PM +0800, Jisheng Zhang wrote:
> > The Cortex-A55/A75/A76 use some implementation defined perf events.
> > Add the support.
> >
> > Jisheng Zhang (3):
> >   arm64: perf: add support for Cortex-A55
> >   arm64: perf: add support for Cortex-A75
> >   arm64: perf: add support for Cortex-A76
> >
> >  arch/arm64/kernel/perf_event.c | 49 +++++++++++++++++++++++++++++++---
> >  1 file changed, 45 insertions(+), 4 deletions(-)  
> 
> Do we really need this? I'd prefer for this stuff to live in userspace

IMHO, this stuff is to add a relationship between linux standard
HW events and ARM PMU events, take CA55 for example:

w/o the stuff, perf -e PREFETCH_LINEFILL

w/ the stuff, perf -e L1-dcache-prefetch-misses

But indeed, we also need to add json descriptions in perf tool, I'll submit
patches.

Thanks

> now that the perf tool has supported JSON event descriptions for a while,
> and the in-kernel driver advertises the architected events advertised
> by PMCEID*.
> 
> Will


  reply	other threads:[~2020-07-06  8:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-19 10:44 [PATCH 0/3] arm64: perf: add support for Cortex-A55/A75/A76 Jisheng Zhang
2020-06-19 10:44 ` Jisheng Zhang
2020-06-19 10:45 ` [PATCH 1/3] arm64: perf: add support for Cortex-A55 Jisheng Zhang
2020-06-19 10:45   ` Jisheng Zhang
2020-06-19 10:45 ` [PATCH 2/3] arm64: perf: add support for Cortex-A75 Jisheng Zhang
2020-06-19 10:45   ` Jisheng Zhang
2020-06-19 10:45 ` [PATCH 3/3] arm64: perf: add support for Cortex-A76 Jisheng Zhang
2020-06-19 10:45   ` Jisheng Zhang
2020-07-03 12:33 ` [PATCH 0/3] arm64: perf: add support for Cortex-A55/A75/A76 Will Deacon
2020-07-03 12:33   ` Will Deacon
2020-07-06  8:04   ` Jisheng Zhang [this message]
2020-07-06  8:04     ` Jisheng Zhang

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