Jitter (e.g. variability in one way or rtt) smokeping is rather good at measuring... The question is do you want to instrument the phenomena through active measurement as smokeping is doing or do you have some application (e.g. streaming media as an example) that you'd like to instrument because the later may be more descriptive of the overall service experience with that application... 정치영 wrote:

Hi,

Could anyone recommend a free performance monitoring tool ? I am already using smokeping the best tool provides delay, packet loss and graphical delay variation and so on. But, additionally I would like to periodically measure the jitter of multi destinations.

Best regards Chiyoung ============================================= Chi-Young Joung SAMSUNG NETWORKS Inc. Email: lionair@samsung.com Tel +82 70 7015 0623, Mobile +82 17 520 9193 Fax +82 70 7016 0031 =============================================