Programmatically measure size and way-order of L1 and L2 caches

Posted by osgx on Stack Overflow See other posts from Stack Overflow or by osgx
Published on 2010-04-05T03:18:36Z Indexed on 2010/04/05 3:53 UTC
Read the original article Hit count: 390

Filed under:

cache

|

processor

|

memory

|

l1

|

l2

How can I measure programmatically (not query the OS, but measure) the size and order of associativity of L1 and L2 caches (data caches)?

Assumptions about system:

It has L1 and L2 cache (may be L3 too, may be cache sharing),
It may have a hardware prefetch unit (just like P4+),
It has a stable clocksource (tickcounter or good HPET for gettimeofday).

There are no assumptions about OS (it can be Linux, Windows, or something non-standard), and we can't use POSIX queries.

Language is C. And compiler optimizations may be disabled.

© Stack Overflow or respective owner

Related posts about cache

How to remove a package entirely?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Hi I'm quite new to Linux, but before using it I was hearing that Windows programs, after uninstallation, leaves a lot of remains on the hard disc, and Linux removes all. I'm using Ubuntu 10.04. To uninstall packages I'm using sudo apt-get autoremove application_name or sudo aptitude purge application_name… >>> More
LVM / Device Mapper maps wrong device

as seen on Server Fault - Search for 'Server Fault'
Hi, I run a LVM setup on a raid1 created by mdadm. md2 is based on sda6 (major:minor 8:6) and sdb6 (8:22). md2 is partition 9:2. The VG on top of md2 has 4 LVs, var, home, usr, tmp. First the problem: While booting it seems as if the device mapper takes the wrong partition for the mapping! Immediately… >>> More
Application throws NotSerializableException when run on an jboss cluster

as seen on Stack Overflow - Search for 'Stack Overflow'
Environment: JBoss 5.1.0, JBoss Seam 2.2.0 While trying to get my application running in a clustered environment after login I am getting the following exception. Post login we try to store the currentUser in jboss seam session context. java.io.NotSerializableException: org.jboss.seam.util.AnnotatedBeanProperty How… >>> More
Windows Azure Evolution – Caching (Preview)

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
Caching is a popular topic when we are building a high performance and high scalable system not only on top of the cloud platform but the on-premise environment as well. On March 2011 the Windows Azure AppFabric Caching had been production launched. It provides an in-memory, distributed caching service… >>> More
Locking Cache Key without Locking the entire Cache

as seen on Stack Overflow - Search for 'Stack Overflow'
I have servlets that caches user information rather then retrieving it from the user store on every request (shared Ehcache). The issue I have is that if a client is multi-threaded and they make more then one simultaneous request, before they have been authenticated, then I get this in my log: Retrieving… >>> More

Related posts about processor

Sun Solaris - Find out number of processors and cores

as seen on Server Fault - Search for 'Server Fault'
Our SPARC server is running Sun Solaris 10; I would like to find out the actual number of processors and the number of cores for each processor. The output of psrinfo and prtdiag is ambiguous: $psrinfo -v Status of virtual processor 0 as of: dd/mm/yyyy hh:mm:ss on-line since dd/mm/yyyy hh:mm:ss… >>> More
Organizations & Architecture UNISA Studies – Chap 7

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
Learning Outcomes Name different device categories Discuss the functions and structure of I/.O modules Describe the principles of Programmed I/O Describe the principles of Interrupt-driven I/O Describe the principles of DMA Discuss the evolution characteristic of I/O channels… >>> More
Very uneven CPU utilization with SQL Server 2012 on 2 processor computer with 16 cores / processor

as seen on Server Fault - Search for 'Server Fault'
After installing SQL Server Enterprise 2012 with the Server + Cal license model, on a computer with 2 processors each with 16 cores (and no hyperthreading involved) and putting the server under extremely heavy load the 16 cores on the first processor were very underutilized, the first 4 cores on the… >>> More
Wireless internet is connected to an open network but has no internet

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I just installed Ubuntu on my laptop yesterday and it connected to the wireless fine. Then I took it to school, put it on their wired connection, downloaded some stuff, and now the wireless doesn't work. At first it would detect networks, but not connect. I restarted it and now it can connect, but… >>> More
Why does Ubuntu (and other ubuntu based distros like lubuntu and linux mint) randomly shutdown on my laptop?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a lenovo g555 laptop and whenever I try and boot a ubuntu based distro off a usb, it randomly shuts off my PC (Not like a normal shutdown with shutdown loading screen but a like a sudden hard power off). This problem occurs even if I have installed the distro on my harddrive. In the past… >>> More