PrintCompilation wall-clock timestamps

[Christian Thalinger]

> On Oct 17, 2016, at 11:33 AM, Vitaly Davidovich <vitalyd at gmail.com> wrote:
> 
> Hi Vladimir,
> 
> Thanks for the response.  A few minor comments below.
> 
> On Mon, Oct 17, 2016 at 4:40 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com <mailto:vladimir.kozlov at oracle.com>> wrote:
> We have diagnostic flag to redirect output to hotspot_<pid>.log file:
> 
> -XX:+UnlockDiagnosticVMOptions -XX:+LogVMOutput
> Thanks -- good to know.  This can also capture safepoint stats output (i.e. PrintSafepointStatistics) as well then, which is nice since it won't go to stdout. 
> 
> Or file specified by LogFile diagnostic flag.
> I thought LogFile was only used in conjunction with LogCompilation, but it looks like I was wrong about that.  Good to know this as well.
> 
> In general, it would be nice to have the option of specifying a separate file for all compiler related output.  This way we could have one file for the compilers, and another file(s) for all other VM things.  This is what I thought UL was going to provide (or allow for), but I could be wrong about that.
> 
> About wall clock usage - file RFE.
> I'm assuming that's for Chris? :) 

You kicked this off.  It’s your baby.

> 
> Thanks,
> Vladimir
>  
> 
> 
> On 10/17/16 1:11 PM, Christian Thalinger wrote:
> 
> On Oct 12, 2016, at 3:51 AM, Vitaly Davidovich <vitalyd at gmail.com <mailto:vitalyd at gmail.com>> wrote:
> 
> Hi guys,
> 
> Has any thought been given to output (or allow an option) the compilation timestamps in wall clock time rather than millis since JVM start?
> 
> I want that too.  You could contribute a patch.
> 
> Relatedly, how about being able to specify a file to contain that output, similar to LogFile for LogCompilation?
> 
> Does the Unified Logging work make any of this possible in Java 9?
> 
> Thanks
> 
> 

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