cpuid.h missing in ARM(Raspberry pi)

[thkaw]

As I know ARM CPU seem no cpuid like x86 CPU have.

So If I compile latest(0.13.1) version for RPI2/3.

Will have an error said:

/home/pi/vernemq_forpi2_0.13.1_orig/vernemq/_build/default/lib/mzmetrics/c_src/mzmetrics_counters_no_preallocation.c:6:19: fatal error: cpuid.h: No such file or directory
 #include <cpuid.h>
                   ^

But few month ago in 0.12.5p4 version of verneMQ, I can compiled and running verneMQ at RPi2/3 without any problem.

Is this problem possible solve?

[larshesel]

Hi

We don't officially support VerneMQ on raspberry pi and therefore it slipped through our fingers that the newest release doesn't compile there. The reason is a new dependency (mzmetrics) which we started using in this release which makes it possible for us to provide metrics with much less overhead than before.

We don't currently have a workaround for this, but will look into this when we have a moment to spare.

If you should find a solution we'd be grateful if you'd share it with us.

Thanks

[larshesel]

Hi again

I didn't figure out if there is a good way to bring cpuid.h onto a raspian system. So I did something dirty. In the vernemq directory I created a _checkouts folder and moved the mzmetrics dependency from _build/default/lib there. And then I changed the code like the following:

diff --git a/c_src/mzmetrics_counters_no_preallocation.c b/c_src/mzmetrics_counters_no_preallocation.c
index 4fa1d0c..9537e6c 100644
--- a/c_src/mzmetrics_counters_no_preallocation.c
+++ b/c_src/mzmetrics_counters_no_preallocation.c
@@ -3,7 +3,7 @@
 #define _DEFAULT_SOURCE
 #include <sched.h>
 #endif
-#include <cpuid.h>
+//#include <cpuid.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdint.h>
@@ -33,14 +33,14 @@ void capi_deinit_counters(void)
 int mycpu(void)
 {
 #ifdef PCPU_COUNTERS
-#ifdef __linux__
+/* #ifdef __linux__ */
     return sched_getcpu();
-#else
-    unsigned int eax, ebx, ecx, edx;
-    if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx))
-        return 0;
-    return 0;
-#endif
+/* #else */
+/*     unsigned int eax, ebx, ecx, edx; */
+/*     if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) */
+/*         return 0; */
+/*     return 0; */
+/* #endif */
 #else
     return 0;
 #endif

This makes it compile and work for me - at least I'm able to subscribe to and publish QoS0 messages.

Note, this was just a quick and dirty hack, but would be good to know if this works for you as well.

Cheers,
Lars

[thkaw]

Thank you for your quick replied.

I'll test dirty code later ;)

[thkaw]

BTW, @larshesel is there have any change log between different version?

[larshesel]

https://github.com/erlio/vernemq/blob/master/changelog.md (I see we made a mistake and called the most recent release 0.13.0 - it should be 0.13.1 - I'll change that in a bit)

[vladbabii]

This resolved the issue on Raspberry Pi 2 (512mb ram version) with latest vernemq source from git.

[kush930]

Hi all,

I cloned master branch of pytorch from link:- https://github.com/pytorch/pytorch.git

I am building pytorch on riscv64, I am facing issue:-

In file included from /home/root/kush/pytorch/third_party/cpuinfo/src/x86/init.c:5:
/home/root/kush/pytorch/third_party/cpuinfo/src/x86/cpuid.h:5:11: fatal error: cpuid.h: No such file or directory
    5 |  #include <cpuid.h>
      |           ^~~~~~~~~
compilation terminated.
make[2]: *** [confu-deps/cpuinfo/CMakeFiles/cpuinfo_internals.dir/build.make:121: confu-deps/cpuinfo/CMakeFiles/cpuinfo_internals.dir/src/x86/init.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:1788: confu-deps/cpuinfo/CMakeFiles/cpuinfo_internals.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

if anyone know, where i am wrong, please guide me to build pytorch on riscv64.

T&R
Kush