From: Peter Zijlstra <peterz@infradead.org>
To: Alex Neronskiy <zakmagnus@chromium.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Don Zickus <dzickus@redhat.com>,
Mandeep Singh Baines <msb@chromium.org>,
Alex Neronskiy <zakmagnus@chromium.com>
Subject: Re: [PATCH v6 2/2] Output stall data in debugfs
Date: Thu, 11 Aug 2011 21:57:28 +0200 [thread overview]
Message-ID: <1313092648.26866.3.camel@twins> (raw)
In-Reply-To: <CAAuSN92aJ2unHgSDi-385ejbEsRHTavxi11cnL_z806a6Z+FZw@mail.gmail.com>
On Thu, 2011-08-11 at 12:51 -0700, Alex Neronskiy wrote:
> I didn't want to hold on to a lock while the lines were iterated over,
> and instead just dump it in one go. I guess it's not a big deal to do
> that, though. Nonetheless, is one page not enough?
The "[<%pK>] %pS\n" that's 6bytes + 8bytes + ~64bytes making 78 bytes at
worst (assuming we have a symbol length max of 64 that is), that yields
4096/78 = 52, so yeah, just about enough since your trace depth is
limited at 50. But its close enough to make me feel uncomfortable.
next prev parent reply other threads:[~2011-08-11 19:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-10 18:02 [PATCH v6 1/2] Track hard and soft "short lockups" or "stalls." Alex Neronskiy
2011-08-10 18:02 ` [PATCH v6 2/2] Output stall data in debugfs Alex Neronskiy
2011-08-11 18:48 ` Andi Kleen
2011-08-11 19:04 ` Don Zickus
2011-08-11 21:05 ` Andi Kleen
2011-08-11 19:13 ` Peter Zijlstra
2011-08-11 19:35 ` Peter Zijlstra
2011-08-11 20:10 ` Alex Neronskiy
2011-08-11 20:23 ` Peter Zijlstra
2011-08-11 20:31 ` Alex Neronskiy
2011-08-11 21:17 ` Peter Zijlstra
2011-08-11 22:02 ` Alex Neronskiy
2011-08-11 23:00 ` Mandeep Singh Baines
2011-08-12 12:14 ` Peter Zijlstra
2011-08-16 19:32 ` Mandeep Singh Baines
2011-08-12 9:06 ` Ingo Molnar
2011-08-12 19:46 ` Alex Neronskiy
2011-08-11 19:43 ` Peter Zijlstra
2011-08-11 19:51 ` Alex Neronskiy
2011-08-11 19:57 ` Peter Zijlstra [this message]
2011-08-11 19:09 ` [PATCH v6 1/2] Track hard and soft "short lockups" or "stalls." Peter Zijlstra
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