crcutil on ppc

[valn...@gmail.com]

Hi All,

Please let know if there crcutil support on ppc arch

Regards,

valnci

[Andrew Kadatch]

If PPC is big-endian (afaik it is), the answer is "no". Otherwise crcutil should work out of the box.

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[valn...@gmail.com]

Hi Andrew, 

Thanks for the quick response.

In my case the ppc is little-endian, i.e. ppc64le. But it doesn't work straightforward. I checked the crc32c_sse4.h and saw that the functions are enclosed in a #if HAVE_I386 || HAVE_AMD64. When I build crcutil code, it gives out error:

examples/interface.cc:311:17: error: ‘Crc32cSSE4’ has not been declared

   return Create(Crc32cSSE4::FixedGeneratingPolynomial(), 0, Crc32cSSE4::FixedDegree(),

Any specific version of crcutil that supports ppc64le ?

Meanwhile, I will build the crcutil removing the #if above.

Regards,

Valnci

[valn...@gmail.com]

Also, could you please tell me the correct way to run the crcutil tests ?

[Andrew Kadatch]

It seems to me that root cause of compilation problems is

definition of either HAVE_I386 or HAVE_AMD64;  obviously,

neither should be defined for power pc.

crcutil does include the tests. When crcutil is built, one of the build

targets is called "unittest". This is exactly what you are looking for.

On Tue, May 9, 2017 at 5:26 AM, <valn...@gmail.com> wrote:

Also, could you please tell me the correct way to run the crcutil tests ?

[valn...@gmail.com]

Hi Andrew,

I commented out the #if HAVE_I386 || HAVE_AMD64  at line number 25 in code/crc32c_sse4.h--------with this change, the compilation proceeded to conclusion without any failures. I also see there are more checks for HAVE_I386,etc. in code/crc32c_sse4.cc, but they seem to not cause any issues while compilation. Any issues that you see can come up here ?

Further, I built the tests using 'make crcutil_ut' target. The tests also run smoothly without any failures. I'm currently comparing the test logs of crcutil for x86 and ppc64le. I'll let you know the findings.

Regards,

Valencia

[valn...@gmail.com]

Hi Andrew,

Sorry...I couldn't post the findings earlier as I got busy working on another urgent task.

Going through the logs, I have some questions.

 1. I notice that most of the readings from the ppc run have 0 values, however, when compared to x86 logs, i see non-zero values. PFA the logs for your reference. Could you guide me on this issue ?

2. Is there any other way to sanity test the crcutil build ? 

Thanks!