Intel® Architecture Code Analyzer (Archived)

IACA fails on older Macs

Both the 32-bit and the 64-bit OS X versions of IACA 2.1 crash on my Mac, with "Illegal instruction: 4". I believe this message means that an unrecognized instruction was encountered. I am using OS X 10.7.5 on a 2007 Core 2 Duo machine, which supports SSE2 but no higher. Was IACA built with code generation for a more recent ISA?

Understanding Latency and Throughput

For a loop with 20 statements, attached below are the latency and throughput analysis by IACA:

Intel(R) Architecture Code Analyzer Version - 2.1
Analyzed File - foo_avx.o
Binary Format - 64Bit
Architecture - HSW
Analysis Type - Latency

Latency Analysis Report
Latency: 27 Cycles

IACA Feedback


First of all well done on an excellent tool! I have just a couple of suggestions:

- My first comment is on the C vs. Assembly orientation of the tool. The documentation seems to suggest the use of IACA with Visual C, using the IACA_START/END macros. This is all well and good, however, although one can find the corresponding code markers for assembly code in the header file, this not documented in the manual. I think this should be added, given that the tool is just as useful (and arguably more so) for assembly code.

iaca-lin32 for x64?

Helo there,

looks like I am missing something simple, but I couldn't find a separate binaries for 64bit linux, where as the one listed on download page(iaca-lin32) gives me a number of errors related to wrong libraries format. Both and of my Centos6.2(x64) yield "wrong ELF class: ELFCLASS64" error. 

Should the set up be more specific, or iaca-lin64 was simply ommited in download page?



Is Microsoft's 64-bit 2010 compiler supported?


I'm using Microsoft's 64-bit compiler in 2010. In version 1.1.3 of IACA there were a IACA_VC64_START macro. This didn't work on any of my test projects.

Now in the latest version (2.0.1) the documentation still mentions the IACA_VC64_START macro, however this is now missing from the iacaMarks.h file.

Are you indeed supporting 64-bit output from the Microsoft 2010 compiler, or only Intel's own 64-bit compiler?

Thank you.

Intel(R) Architecture Code Analyzer 2.0 Now Available

Intel Architecture Code Analyzer 2.0 is now available. This release includes support for the 2nd and 3rd generation Intel Core processor families (code-named Sandy Bridge and Ivy Bridge, respsectively), support for the Mac OS X platform, and improvements to the analyzes.

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