Re: [PATCH] perf record: enable multiplexing scaling via -R

On Fri, Sep 01, 2017 at 01:21:03AM -0700, Stephane Eranian wrote: SNIP > >> I am also surprised to see that perf record keep inherit=1 in > >> system-wide mode. I don't think this > >> is relavant in this mode. But the kernel this fails in this case, > >> which I think is a bug. In system-wide >

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Fri, Sep 01, 2017 at 01:21:03AM -0700, Stephane Eranian wrote: SNIP > >> I am also surprised to see that perf record keep inherit=1 in > >> system-wide mode. I don't think this > >> is relavant in this mode. But the kernel this fails in this case, > >> which I think is a bug. In system-wide >

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Fri, Sep 1, 2017 at 12:59 AM, Jiri Olsa wrote: > On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: >> Hi, >> >> >> On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: >> >> So I think we are good to go. to capture multiplexing scaling

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Fri, Sep 1, 2017 at 12:59 AM, Jiri Olsa wrote: > On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: >> Hi, >> >> >> On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: >> >> So I think we are good to go. to capture multiplexing scaling factor >> >> when sampling simply use the S

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: > Hi, > > > On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: > >> So I think we are good to go. to capture multiplexing scaling factor > >> when sampling simply use the S > >> modifier. > >> But to my

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: > Hi, > > > On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: > >> So I think we are good to go. to capture multiplexing scaling factor > >> when sampling simply use the S > >> modifier. > >> But to my surprise, newer kernels

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: SNIP > I am also surprised to see that perf record keep inherit=1 in > system-wide mode. I don't think this > is relavant in this mode. But the kernel this fails in this case, > which I think is a bug. In system-wide > mode, the

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Wed, Aug 30, 2017 at 11:21:23PM -0700, Stephane Eranian wrote: SNIP > I am also surprised to see that perf record keep inherit=1 in > system-wide mode. I don't think this > is relavant in this mode. But the kernel this fails in this case, > which I think is a bug. In system-wide > mode, the

Re: [PATCH] perf record: enable multiplexing scaling via -R

Hi, On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: >> So I think we are good to go. to capture multiplexing scaling factor >> when sampling simply use the S >> modifier. >> But to my surprise, newer kernels are not happy with the cmdline: >> $ perf record -e cycles:S

Re: [PATCH] perf record: enable multiplexing scaling via -R

Hi, On Mon, Aug 28, 2017 at 1:41 PM, Andi Kleen wrote: >> So I think we are good to go. to capture multiplexing scaling factor >> when sampling simply use the S >> modifier. >> But to my surprise, newer kernels are not happy with the cmdline: >> $ perf record -e cycles:S noploop 1 >> Error: >>

Re: [PATCH] perf record: enable multiplexing scaling via -R

> So I think we are good to go. to capture multiplexing scaling factor > when sampling simply use the S > modifier. > But to my surprise, newer kernels are not happy with the cmdline: > $ perf record -e cycles:S noploop 1 > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid

Re: [PATCH] perf record: enable multiplexing scaling via -R

> So I think we are good to go. to capture multiplexing scaling factor > when sampling simply use the S > modifier. > But to my surprise, newer kernels are not happy with the cmdline: > $ perf record -e cycles:S noploop 1 > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid

Re: [PATCH] perf record: enable multiplexing scaling via -R

Hi, On Tue, Aug 22, 2017 at 12:24 AM, Stephane Eranian wrote: > On Tue, Aug 22, 2017 at 12:03 AM, Jiri Olsa wrote: >> >> On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: >> > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: >> >

Re: [PATCH] perf record: enable multiplexing scaling via -R

Hi, On Tue, Aug 22, 2017 at 12:24 AM, Stephane Eranian wrote: > On Tue, Aug 22, 2017 at 12:03 AM, Jiri Olsa wrote: >> >> On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: >> > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: >> > > On Mon, Aug 21, 2017 at 4:02 PM,

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Tue, Aug 22, 2017 at 12:03 AM, Jiri Olsa wrote: > > On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: > > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > > > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > > > > >

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Tue, Aug 22, 2017 at 12:03 AM, Jiri Olsa wrote: > > On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: > > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > > > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > > > > > Stephane Eranian writes: > > > > > >

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > > > Stephane Eranian writes: > > > > > > > > To activate, the

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 06:25:45PM -0700, Andi Kleen wrote: > On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > > > Stephane Eranian writes: > > > > > > > > To activate, the user must use: > > > > $ perf record -a -R

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > Stephane Eranian writes: > > > > > > To activate, the user must use: > > > $ perf record -a -R > > > > I don't know why

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > Stephane Eranian writes: > > > > > > To activate, the user must use: > > > $ perf record -a -R > > > > I don't know why you're overloading the existing raw mode? >

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > Stephane Eranian writes: > > > > To activate, the user must use: > > $ perf record -a -R > > I don't know why you're overloading the existing raw mode? > > It has nothing to do with that. > I

Re: [PATCH] perf record: enable multiplexing scaling via -R

On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > Stephane Eranian writes: > > > > To activate, the user must use: > > $ perf record -a -R > > I don't know why you're overloading the existing raw mode? > > It has nothing to do with that. > I explained this in the changelog. So that is

Re: [PATCH] perf record: enable multiplexing scaling via -R

Stephane Eranian writes: > > To activate, the user must use: > $ perf record -a -R I don't know why you're overloading the existing raw mode? It has nothing to do with that. -Andi

Re: [PATCH] perf record: enable multiplexing scaling via -R

Stephane Eranian writes: > > To activate, the user must use: > $ perf record -a -R I don't know why you're overloading the existing raw mode? It has nothing to do with that. -Andi

[PATCH] perf record: enable multiplexing scaling via -R

This patch allows perf record to request that event timing be recorded in each sample. The timing consists of time_enabled and time_running. These two values are used to compute the multiplexing correction, i.e., how long an event was actually measured by the hardware. To activate, the user must

[PATCH] perf record: enable multiplexing scaling via -R

This patch allows perf record to request that event timing be recorded in each sample. The timing consists of time_enabled and time_running. These two values are used to compute the multiplexing correction, i.e., how long an event was actually measured by the hardware. To activate, the user must