Software Archive
Read-only legacy content
Announcements
Welcome to the Intel Community. If you get an answer you like, please mark it as an Accepted Solution to help others. Thank you!
17065 Discussions

Is there support for, or planned support for, RDTSC[P] event logging?

Gregory
Beginner
74 Views

In the case of KVM with replay support, one of the events that must be handled is capturing the output of RDTSC

.  It seemed like this would naturally be the type of event captured by Intel PT, however it seems this is not the case - as TSC packets simply occasionally report the TSC register value.  

Is there something I've overlooked in the manuals?  Does RDTSC

actually cause a TSC packet to be generated by Intel PT?  It there any planned support for logging RDTSC

output similar to Page Modification Logging (PML?).  This seems like it would greatly increase the performance of Virtual Machines, such that RDTSC

Exiting would not be required for many use cases.

0 Kudos
0 Replies
Reply