From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gihan Munasinghe <GMunasinghe@flexiant.com>
Subject: Physical node info from libxl
Date: Fri, 07 May 2010 12:12:31 +0100
Message-ID: <4BE3F59F.4040509@flexiant.com>
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Guys

Looking at the libxl I can't see anywhere I can get a node info structure..
basically the physical info of the Node e.g - total_ram, free ram, no 
cpu etc

With the current xen version(3.3), I am pulling these data directly from 
xenctrl

     long int pagesize;
     xc_physinfo_t physinfo = {0};
     pagesize = sysconf(_SC_PAGE_SIZE);
     result = xc_physinfo(xc_handle, &physinfo);
     nodeinfo->cpu_hz = ((unsigned long long)physinfo.cpu_khz) * 1000ULL;
     nodeinfo->num_cpus = physinfo.nr_cpus;
     nodeinfo->tot_mem = ((unsigned long long) physinfo.total_pages) * 
pagesize ;
     nodeinfo->free_mem = ((unsigned long long) physinfo.free_pages) * 
pagesize ;
 
But I think having this code in libxl make more sense. So can I suggest 
a new structure like

typedef struct libxl_physinfo{
    long long cpu_hz;
    long long total_memorykb;
    long long free_memorykb;
    int num_cpus;
    /*Any more suggestions*/
}libxl_physinfo;

and a method
libxl_physinfo *libxl_physical_info(struct libxl_ctx *ctx);

This can be used in something like "xl info" as well  What you guys think?

Thanks

-- 
Gihan Munasinghe
R&D Team Leader
Flexiant Ltd.
www.flexiant.com