mirrors/xmrig
1
0
Fork 1
mirror of https://github.com/xmrig/xmrig.git synced 2025-12-12 09:42:50 -05:00
Code Issues Projects Releases Wiki Activity

soft_aes: fix previous optimization

Browse Source 
Previously removed unrolled variant is faster on some CPUs
Some CPUs are faster with added unrolled variant
The best variant depends on number of threads on some CPUs
This commit is contained in:
cohcho
2020-10-04 14:47:58 +00:00
parent 31e896feef
commit 5f0f2506e8
6 changed files with 116 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
src/crypto/randomx/soft_aes.cpp
View File

@@ -28,9 +28,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "crypto/randomx/soft_aes.h"
#include "crypto/randomx/aes_hash.hpp"
#include "base/tools/Chrono.h"
#include <vector>
alignas(64) uint32_t lutEnc0[256];
alignas(64) uint32_t lutEnc1[256];
@@ -120,47 +117,3 @@ static struct SAESInitializer
}
}
} aes_initializer;
static uint32_t softAESImpl = 1;
uint32_t GetSoftAESImpl()
{
return softAESImpl;
}
void SelectSoftAESImpl()
{
constexpr int test_length_ms = 100;
double speed[2] = {};
for (int run = 0; run < 3; ++run) {
for (int i = 0; i < 2; ++i) {
std::vector<uint8_t> scratchpad(10 * 1024);
uint8_t hash[64] = {};
uint8_t state[64] = {};
uint64_t t1, t2;
uint32_t count = 0;
t1 = xmrig::Chrono::highResolutionMSecs();
do {
if (i == 0) {
hashAndFillAes1Rx4<1>(scratchpad.data(), scratchpad.size(), hash, state);
}
else {
hashAndFillAes1Rx4<2>(scratchpad.data(), scratchpad.size(), hash, state);
}
++count;
t2 = xmrig::Chrono::highResolutionMSecs();
} while (t2 - t1 < test_length_ms);
const double x = count * 1e3 / (t2 - t1);
if (x > speed[i]) {
speed[i] = x;
}
}
}
softAESImpl = (speed[0] > speed[1]) ? 1 : 2;
}