• State Accepted Answer
  • Locked Locked
  • Replies 6 replies
  • Subscribers 350 subscribers
  • Views 12462 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Armv7 Store Buffer

Youq

Hi,

Store Buffer holds store operation before it is commited to Cache or Main Memory.

So only if the proper store buffer entry is drained, can we get the right data by a load operation. Am I right?

If yes, is it possible that we read a unexpected value after a write without a drain request(e.g. DMB)?

Thanks&Regards.

Parents
  • +1 in reply to Youq

    That is correct, on both single- and multi- processors.

    The single cpu reference was to highlight, through an example, that a cpu won't return wrong data as you feared (in the particular case of a cpu reading its own writes to a location not shared with other cpus).

    Edit: For clarity.

Reply
  • +1 in reply to Youq

    That is correct, on both single- and multi- processors.

    The single cpu reference was to highlight, through an example, that a cpu won't return wrong data as you feared (in the particular case of a cpu reading its own writes to a location not shared with other cpus).

    Edit: For clarity.

Children