On 11/8/17 10:53 PM, Thomas Gleixner wrote:
On Wed, 8 Nov 2017, Yonghong Song wrote:
On 11/8/17 4:06 PM, David Miller wrote:
From: Yonghong Song
Date: Wed, 8 Nov 2017 13:37:12 -0800
Uprobe is a tracing mechanism for userspace programs.
Typical uprobe will incur overhead of two traps.
First
On Wed, 8 Nov 2017, Yonghong Song wrote:
> On 11/8/17 4:06 PM, David Miller wrote:
> > From: Yonghong Song
> > Date: Wed, 8 Nov 2017 13:37:12 -0800
> >
> > > Uprobe is a tracing mechanism for userspace programs.
> > > Typical uprobe will incur overhead of two traps.
> > > First trap is caused by
On 11/8/17 4:06 PM, David Miller wrote:
From: Yonghong Song
Date: Wed, 8 Nov 2017 13:37:12 -0800
Uprobe is a tracing mechanism for userspace programs.
Typical uprobe will incur overhead of two traps.
First trap is caused by replaced trap insn, and
the second trap is to execute the original d
From: Yonghong Song
Date: Wed, 8 Nov 2017 13:37:12 -0800
> Uprobe is a tracing mechanism for userspace programs.
> Typical uprobe will incur overhead of two traps.
> First trap is caused by replaced trap insn, and
> the second trap is to execute the original displaced
> insn in user space.
...
Uprobe is a tracing mechanism for userspace programs.
Typical uprobe will incur overhead of two traps.
First trap is caused by replaced trap insn, and
the second trap is to execute the original displaced
insn in user space.
To reduce the overhead, kernel provides hooks
for architectures to emulate
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