release/src/router/dnscrypt/src/libnacl/crypto_hash/measure.c

   1 #include <stdlib.h>
   2 #include "randombytes.h"
   3 #include "cpucycles.h"
   4 #include "crypto_hash.h"
   5
   6 extern void printentry(long long,const char *,long long *,long long);
   7 extern unsigned char *alignedcalloc(unsigned long long);
   8 extern const char *primitiveimplementation;
   9 extern const char *implementationversion;
  10 extern const char *sizenames[];
  11 extern const long long sizes[];
  12 extern void allocate(void);
  13 extern void measure(void);
  14
  15 const char *primitiveimplementation = crypto_hash_IMPLEMENTATION;
  16 const char *implementationversion = crypto_hash_VERSION;
  17 const char *sizenames[] = { "outputbytes", 0 };
  18 const long long sizes[] = { crypto_hash_BYTES };
  19
  20 #define MAXTEST_BYTES 4096
  21 #ifdef SUPERCOP
  22 #define MGAP 8192
  23 #else
  24 #define MGAP 8
  25 #endif
  26
  27 static unsigned char *h;
  28 static unsigned char *m;
  29
  30 void preallocate(void)
  31 {
  32 }
  33
  34 void allocate(void)
  35 {
  36   h = alignedcalloc(crypto_hash_BYTES);
  37   m = alignedcalloc(MAXTEST_BYTES);
  38 }
  39
  40 #define TIMINGS 15
  41 static long long cycles[TIMINGS + 1];
  42
  43 static void printcycles(long long mlen)
  44 {
  45   int i;
  46   for (i = 0;i < TIMINGS;++i) cycles[i] = cycles[i + 1] - cycles[i];
  47   printentry(mlen,"cycles",cycles,TIMINGS);
  48 }
  49
  50 void measure(void)
  51 {
  52   int i;
  53   int loop;
  54   int mlen;
  55
  56   for (loop = 0;loop < LOOPS;++loop) {
  57     for (mlen = 0;mlen <= MAXTEST_BYTES;mlen += 1 + mlen / MGAP) {
  58       randombytes(m,mlen);
  59       for (i = 0;i <= TIMINGS;++i) {
  60         cycles[i] = cpucycles();
  61         crypto_hash(h,m,mlen);
  62       }
  63       printcycles(mlen);
  64     }
  65   }
  66 }