Add munmap events to perf
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From: Peter Zijlstra on 28 Jun 2010 16:10 On Mon, 2010-06-28 at 19:08 +0100, Eric B Munson wrote: > This patch adds a new software event for munmaps. It will allows > users to profile changes to address space. munmaps will be tracked > with mmaps. Why? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric B Munson on 29 Jun 2010 04:40 On Mon, 28 Jun 2010, Peter Zijlstra wrote: > On Mon, 2010-06-28 at 19:08 +0100, Eric B Munson wrote: > > This patch adds a new software event for munmaps. It will allows > > users to profile changes to address space. munmaps will be tracked > > with mmaps. > > Why? > It is going to be used by a tool that will model memory usage over the lifetime of a process. -- Eric B Munson IBM Linux Technology Center ebmunson(a)us.ibm.com
From: Peter Zijlstra on 29 Jun 2010 07:30 On Tue, 2010-06-29 at 09:33 +0100, Eric B Munson wrote: > On Mon, 28 Jun 2010, Peter Zijlstra wrote: > > > On Mon, 2010-06-28 at 19:08 +0100, Eric B Munson wrote: > > > This patch adds a new software event for munmaps. It will allows > > > users to profile changes to address space. munmaps will be tracked > > > with mmaps. > > > > Why? > > > > It is going to be used by a tool that will model memory usage over the > lifetime of a process. Wouldn't it be better to use some tracepoints for that instead? I want to keep the sideband data to a minimum required to interpret the sample data, and you don't need unmap events for that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Eric B Munson on 30 Jun 2010 07:10
On Tue, 29 Jun 2010, Peter Zijlstra wrote: > On Tue, 2010-06-29 at 09:33 +0100, Eric B Munson wrote: > > On Mon, 28 Jun 2010, Peter Zijlstra wrote: > > > > > On Mon, 2010-06-28 at 19:08 +0100, Eric B Munson wrote: > > > > This patch adds a new software event for munmaps. It will allows > > > > users to profile changes to address space. munmaps will be tracked > > > > with mmaps. > > > > > > Why? > > > > > > > It is going to be used by a tool that will model memory usage over the > > lifetime of a process. > > Wouldn't it be better to use some tracepoints for that instead? I want > to keep the sideband data to a minimum required to interpret the sample > data, and you don't need unmap events for that. > > Sure, I will get it moved to a tracepoint event instead. -- Eric B Munson IBM Linux Technology Center ebmunson(a)us.ibm.com |