RFR: 8266723: JFR periodic events are causing extra allocations

[Andrew Dinn]

On 17/05/2021 12:44, Jaroslav Bachorík wrote:
> JDK 11 has the full implementation of JVM logging and the
> 'should_log()' implementation is based on it.

>> One small point, is it not excessive to always dive into native
>> coding for querying the log state? How hot is this coding? Ideally
>> logging should not cause overhead if logging is disabled. Would it not
>> be sufficient to cache the value in java?
> 
> Good point. I will add caching.
That first statement makes me wonder about the need for this? Is the log 
setting also cached in jdk11? If not then I wonder whether this is 
really needed.

regards,


Andrew Dinn
-----------
Red Hat Distinguished Engineer
Red Hat UK Ltd
Registered in England and Wales under Company Registration No. 03798903
Directors: Michael Cunningham, Michael ("Mike") O'Neill