Re: [tracecompass-dev] Question about importing a multi-cpu perf capture

[Matthew Khouzam <matthew.khouzam@xxxxxxxxxxxx>]

Jerome, could you try to change the file CtfCpuAspect.java in
tmf.ctf.core to this

/*******************************************************************************
 * Copyright (c) 2014, 2015 Ericsson
 *
 * All rights reserved. This program and the accompanying materials are
 * made available under the terms of the Eclipse Public License v1.0 which
 * accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Alexandre Montplaisir - Initial API and implementation
 *******************************************************************************/

package org.eclipse.tracecompass.tmf.ctf.core.event.aspect;

import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.event.ITmfEventField;
import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
import org.eclipse.tracecompass.tmf.ctf.core.event.CtfTmfEvent;

/**
 * "CPU" event aspect for CTF traces.
 *
 * @author Alexandre Montplaisir
 */
public class CtfCpuAspect extends TmfCpuAspect {

    @Override
    public Integer resolve(ITmfEvent event) {
        if (!(event instanceof CtfTmfEvent)) {
            return null;
        }
        int cpu = ((CtfTmfEvent) event).getCPU();
        if (cpu == 0) {
            final ITmfEventField field =
event.getContent().getField("perf_cpu");
            if (field != null) {
                final Object value = field.getValue();
                if (value instanceof Long) {
                    cpu = (int) value;
                }
            }
        }
        return cpu;
    }
}


It seems to work here. I want to confirm before productifying the patch.

On 15-12-18 09:46 AM, Jerome CORRENOZ wrote:
>
> Hi,
>
>  
>
> I’m starting to use TraceCompass to import a perf trace.
>
>  
>
> I have a problem with multi-CPU. Indeed, the trace has been captured
> on a multi-CPU but all the events seem to be associated to CPU0 (see
> the table view, column “CPU”) whereas the “Contents” correctly
> contains the “perf_cpu=X”. This impacts the “Resources” view where
> only CPU0 is displayed but mainly the “Control Flow” view.
>
>  
>
> I’m using:
>
> -    perf 4.1.1 on ARMv7
>
> -    TraceCompass 1.1.0
>
>  
>
> Doing the following:
>
>  
>
> #perf record –e ‘sched :*’ –a
>
> #perf data convert –to-ctf=./ctf
>
> Then Open the ctf file (called perf_stream_0) in TraceCompass
>
>  
>
> Any ideas about the cause of it ?
>
>  
>
> BR,
>
>   Jerome
>
>  
>
>  
>
>
>
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