- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi!
I have some Perl scripts that implement some of the top-level vtune profiling for sandy bridge (and SB Xeon.)
Noticably:
* % cycles spent LLC miss: ~ 53%
* % cycles spent doing DTLB walks: ~ 10%
* % cycles spent accessing data modified by another core: ~ 3.5%
My question: when doing DTLB walks (DTLB_LOAD_MISSES.WALK_DURATION) and cycles spent hit'ing on data modified by another core (MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_HITM) - do these overlap in any way with the LLC_MISS (ie memory access - MEM_LOAD_UOPS_MISC_RETIRED.LLC_MISS) ? Partially overlap? Don't overlap at all?
I'm especially interested in whether the DTLB walks count towards MEM_LOAD_UOPS_MISC_RETIRED.LLC_MISS.
Thanks!
-adrian
Link Copied
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Adrian,
I'd have to see the full equation for the metric. Can you post them? Even with the equation it might be hard to tell.
Pat
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
The code is at github.com/erikarn/hwpmc/ . The equations match what's in this PDF:
Thanks!
-adrian
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
The code is at github.com/erikarn/hwpmc/ . The equations match what's in this PDF:
Thanks!
-adrian
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
A 42 pages of images, unsearchable document. nice.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
The PDF display for me has a bunch of images but the formulas are in text, so they're searchable.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
bump?

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page