Firstly， you should check the status return form CreateEvent function and what’s the parameters you filled in.

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发件人: stanley.ganyezu@...<mailto:stanley.ganyezu@...>
发送时间: 2020年4月4日 8:31
收件人: discuss@edk2.groups.io<mailto:discuss@edk2.groups.io>
主题: [edk2-discuss] debug UEFI Event

Hello All,
I have an event callback function not called. So, I want to track event execution in UEFI. There is a "DEBUG_EVENT" debug level in EDKII. But no module in EDKII actually use this debug level.
I add some debug print in "CoreCreateEventInternal" and "CoredispatchEventNotifies"，it cause TPL ASSERT. Can anybody give me some constructive debug suggestion?