From: jld@mozilla.com (Jed Davis)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] perf: arm64: Record the user-mode PC in the call chain.
Date: Wed, 19 Jun 2013 20:07:14 -0700 [thread overview]
Message-ID: <20130620030713.GA27428@mozilla.com> (raw)
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
---
arch/arm64/kernel/perf_event.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 1e49e5eb..9ba33c4 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -1336,6 +1336,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
return;
}
+ perf_callchain_store(entry, regs->pc);
tail = (struct frame_tail __user *)regs->regs[29];
while (entry->nr < PERF_MAX_STACK_DEPTH &&
--
1.7.10.4
WARNING: multiple messages have this Message-ID (diff)
From: Jed Davis <jld@mozilla.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: [PATCH] perf: arm64: Record the user-mode PC in the call chain.
Date: Wed, 19 Jun 2013 20:07:14 -0700 [thread overview]
Message-ID: <20130620030713.GA27428@mozilla.com> (raw)
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
---
arch/arm64/kernel/perf_event.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 1e49e5eb..9ba33c4 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -1336,6 +1336,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
return;
}
+ perf_callchain_store(entry, regs->pc);
tail = (struct frame_tail __user *)regs->regs[29];
while (entry->nr < PERF_MAX_STACK_DEPTH &&
--
1.7.10.4
next reply other threads:[~2013-06-20 3:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 3:07 Jed Davis [this message]
2013-06-20 3:07 ` [PATCH] perf: arm64: Record the user-mode PC in the call chain Jed Davis
2013-06-20 8:33 ` Ingo Molnar
2013-06-20 8:33 ` Ingo Molnar
2013-06-20 9:11 ` Will Deacon
2013-06-20 9:11 ` Will Deacon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130620030713.GA27428@mozilla.com \
--to=jld@mozilla.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.