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#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <xenctrl.h>
int main(int argc, char * argv[])
{
unsigned long size;
int xc_handle = xc_interface_open();
if ( xc_tbuf_get_size(xc_handle, &size) != 0 )
{
perror("Failure to get tbuf info from Xen. Guess size is 0");
printf("This may mean that tracing is not enabled in xen.\n");
}
else
{
printf("Current tbuf size: 0x%lx\n", size);
}
if (argc < 2)
exit(0);
size = atol(argv[1]);
if ( xc_tbuf_set_size(xc_handle, size) != 0 )
{
perror("set_size Hypercall failure");
exit(1);
}
printf("set_size succeeded.\n");
if (xc_tbuf_get_size(xc_handle, &size) != 0)
perror("Failure to get tbuf info from Xen."
" Tracing must be enabled first");
else
printf("New tbuf size: 0x%lx\n", size);
xc_interface_close(xc_handle);
return 0;
}
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