GMP 3.1.1 Alpha(21164) Linux(Debian 2.2) problems

[Fat Phil]

Problems and fortunately a solution to one too.

Firstly, on my Alpha, /proc/cpuinfo has its info in a different form, it
uses "BogoMIPS", rather than "bogomips". Hence in tune/time.c, the
following changes (or similar) need to be applied: (orig_time.c being
the distributed code)

address@hidden:tune$ diff -c time.c orig_time.c 
*** time.c      Mon Jan 29 10:04:37 2001
--- orig_time.c Sun Jul 30 03:35:03 2000
***************
*** 155,183 ****
      {
        while (fgets (buf, sizeof (buf), fp) != NULL)
          {
-         double multiplier=0.0; 
            if (sscanf (buf, "cycle frequency [Hz]    : %lf est.\n",
&val) == 1)
-           {
-               multiplier = 1.0;
-             }
-           else if (sscanf (buf, "cpu MHz  : %lf\n", &val) == 1)
              {
!               multiplier = 1e-6;
              }
!           else if (sscanf (buf, "bogomips : %lf\n", &val) == 1)
              {
!               multiplier = 1e-6;
              }
!           else if (sscanf (buf, "BogoMIPS : %lf\n", &val) == 1)
!           {
!             multiplier = 1e-6;
!           }
!         if ((multiplier != 0.0) && (val != 0.0))
!           {
!             speed_cycletime = multiplier / val;
                ret = 1;
                break;
!           }
          }
        fclose (fp);
      }
--- 155,178 ----
      {
        while (fgets (buf, sizeof (buf), fp) != NULL)
          {
            if (sscanf (buf, "cycle frequency [Hz]    : %lf est.\n",
&val) == 1)
              {
!               speed_cycletime = 1.0 / val;
!               ret = 1;
!               break;
              }
!           if (sscanf (buf, "cpu MHz  : %lf\n", &val) == 1)
              {
!               speed_cycletime = 1e-6 / val;
!               ret = 1;
!               break;
              }
!           if (sscanf (buf, "bogomips : %lf\n", &val) == 1)
!             {
!               speed_cycletime = 1e-6 / val;
                ret = 1;
                break;
!             }
          }
        fclose (fp);
      }


The second one I've not had a chance to look at yet (hey, I only
downloaded it an hour ago!).

address@hidden:/usr/local/src/gmp-3.1.1/tune$ ./speed -s 349059 -C
mpn_add_n
overhead 9.03 cycles, precision 10000 units of 1.88e-09 secs, cycle
1.9e-09
            mpn_add_n
349059        45.8807
address@hidden:/usr/local/src/gmp-3.1.1/tune$ ./speed -s 349060 -C
mpn_add_n
overhead 9.03 cycles, precision 10000 units of 1.88e-09 secs, cycle
1.9e-09
            mpn_add_n
Segmentation fault


I did a binary chop, and it seemed that the cutoff is deterministic.


Phil Carmody