From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>
Subject: Re: [PATCH] powerpc/64s/perf: Always use SIAR for kernel interrupts
Date: Wed, 18 Aug 2021 23:38:14 +1000 [thread overview]
Message-ID: <162929389413.3619265.9033949276183345817.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20210720141504.420110-1-npiggin@gmail.com>
On Wed, 21 Jul 2021 00:15:04 +1000, Nicholas Piggin wrote:
> If an interrupt is taken in kernel mode, always use SIAR for it rather than
> looking at regs_sipr. This prevents samples piling up around interrupt
> enable (hard enable or interrupt replay via soft enable) in PMUs / modes
> where the PR sample indication is not in synch with SIAR.
>
> This results in better sampling of interrupt entry and exit in particular.
Applied to powerpc/next.
[1/1] powerpc/64s/perf: Always use SIAR for kernel interrupts
https://git.kernel.org/powerpc/c/cf9c615cde49fb5d2480549c8c955a0a387798d3
cheers
prev parent reply other threads:[~2021-08-18 13:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 14:15 [PATCH] powerpc/64s/perf: Always use SIAR for kernel interrupts Nicholas Piggin
2021-07-21 5:36 ` Athira Rajeev
2021-08-18 13:38 ` Michael Ellerman [this message]
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