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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prev parent reply other threads:[~2020-07-06 8:05 UTC|newest]
Thread overview: 6+ 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 10:45 ` [PATCH 1/3] arm64: perf: add support for Cortex-A55 Jisheng Zhang
2020-06-19 10:45 ` [PATCH 2/3] arm64: perf: add support for Cortex-A75 Jisheng Zhang
2020-06-19 10:45 ` [PATCH 3/3] arm64: perf: add support for Cortex-A76 Jisheng Zhang
2020-07-03 12:33 ` [PATCH 0/3] arm64: perf: add support for Cortex-A55/A75/A76 Will Deacon
2020-07-06 8:04 ` Jisheng Zhang [this message]
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