I meant to say: evidence collected *thus far* indicates that... Ceki Gulcu wrote:
Joern Huxhorn wrote:
Nope, a discussion like that is really necessary because this whole issue is pretty crucial and will essentially decide how well Logback will perform in environments with >1 CPU-cores. This will become more and more important with more cores added in every new CPU generation. The more cores are present, the more relevant the issue of unfairness will become, since waiting threads will mean idling CPUs.
While open to further investigation and new data, evidence collected indicates that threads in Sun's JDK on multi-core CPU on Linux as well as other platforms can make other threads starve but that is *not* a logback issue. Moreover, it would be unfair to penalize *all* logback users using fair locking which is much slower than synchronization or unfair locks.
As a side note, and if my memory serves me well, you gather caller data for every log call which can have significant impact on performance. Are you collecting caller data?
Regards, Joern.
-- Ceki Gülcü Logback: The reliable, generic, fast and flexible logging framework for Java. http://logback.qos.ch