cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

spark.c (790B)

      1#include <stdio.h>
      2#include <limits.h>
      3#include <string.h>
      4#include <stdlib.h>
      5#include "spark.h"
      6#include "stat.h"
      7
      8#define SPARK_SHIFT 8
      9
     10/* Print spark lines on outf for numval values in val. */
     11int print_spark(char *bf, int size, unsigned long *val, int numval)
     12{
     13	static const char *ticks[NUM_SPARKS] = {
     14		"▁",  "▂", "▃", "▄", "▅", "▆", "▇", "█"
     15	};
     16	int i, printed = 0;
     17	unsigned long min = ULONG_MAX, max = 0, f;
     18
     19	for (i = 0; i < numval; i++) {
     20		if (val[i] < min)
     21			min = val[i];
     22		if (val[i] > max)
     23			max = val[i];
     24	}
     25	f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1);
     26	if (f < 1)
     27		f = 1;
     28	for (i = 0; i < numval; i++) {
     29		printed += scnprintf(bf + printed, size - printed, "%s",
     30				     ticks[((val[i] - min) << SPARK_SHIFT) / f]);
     31	}
     32
     33	return printed;
     34}