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2005-10-08 jrandom

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* Use the OS clock for stat timing, since it doesn't jump around (though
      still use the NTP'ed clock for display)
    * Added new DH stats
This commit is contained in:
jrandom
2005-10-08 22:05:46 +00:00
committed by zzz
parent 38617fe0a7
commit ad574c8504
5 changed files with 36 additions and 11 deletions
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21
core/java/src/net/i2p/crypto/DHSessionKeyBuilder.java
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@ -66,11 +66,13 @@ public class DHSessionKeyBuilder {
public final static String PROP_DH_PRECALC_MAX = "crypto.dh.precalc.max";
public final static String PROP_DH_PRECALC_DELAY = "crypto.dh.precalc.delay";
public final static String DEFAULT_DH_PRECALC_MIN = "5";
public final static String DEFAULT_DH_PRECALC_MAX = "10";
public final static String DEFAULT_DH_PRECALC_DELAY = "1000";
public final static String DEFAULT_DH_PRECALC_MAX = "50";
public final static String DEFAULT_DH_PRECALC_DELAY = "10000";
static {
I2PAppContext ctx = _context;
ctx.statManager().createRateStat("crypto.dhGeneratePublicTime", "How long it takes to create x and X", "Encryption", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
ctx.statManager().createRateStat("crypto.dhCalculateSessionTime", "How long it takes to create the session key", "Encryption", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
try {
int val = Integer.parseInt(ctx.getProperty(PROP_DH_PRECALC_MIN, DEFAULT_DH_PRECALC_MIN));
MIN_NUM_BUILDERS = val;
@ -225,11 +227,12 @@ public class DHSessionKeyBuilder {
*
*/
public BigInteger generateMyValue() {
long start = Clock.getInstance().now();
long start = System.currentTimeMillis();
_myPrivateValue = new NativeBigInteger(2048, RandomSource.getInstance());
BigInteger myValue = CryptoConstants.elgg.modPow(_myPrivateValue, CryptoConstants.elgp);
long end = Clock.getInstance().now();
long end = System.currentTimeMillis();
long diff = end - start;
_context.statManager().addRateData("crypto.dhGeneratePublicTime", diff, diff);
if (diff > 1000) {
if (_log.shouldLog(Log.WARN))
_log.warn("Took more than a second (" + diff + "ms) to generate local DH value");
@ -339,7 +342,7 @@ public class DHSessionKeyBuilder {
*
*/
private final SessionKey calculateSessionKey(BigInteger myPrivateValue, BigInteger publicPeerValue) {
long start = Clock.getInstance().now();
long start = System.currentTimeMillis();
SessionKey key = new SessionKey();
BigInteger exchangedKey = publicPeerValue.modPow(myPrivateValue, CryptoConstants.elgp);
byte buf[] = exchangedKey.toByteArray();
@ -361,8 +364,10 @@ public class DHSessionKeyBuilder {
_log.debug("Storing " + remaining.length + " bytes from the end of the DH exchange");
}
key.setData(val);
long end = Clock.getInstance().now();
long end = System.currentTimeMillis();
long diff = end - start;
_context.statManager().addRateData("crypto.dhCalculateSessionTime", diff, diff);
if (diff > 1000) {
if (_log.shouldLog(Log.WARN)) _log.warn("Generating session key took too long (" + diff + " ms");
} else {
@ -490,10 +495,12 @@ public class DHSessionKeyBuilder {
curSize = startSize;
while (curSize < _minSize) {
while (curSize < _maxSize) {
long curStart = System.currentTimeMillis();
curSize = addBuilder(precalc(curSize));
long curCalc = System.currentTimeMillis() - curStart;
// for some relief...
try {
Thread.sleep(CALC_DELAY);
Thread.sleep(CALC_DELAY + curCalc * 10);
} catch (InterruptedException ie) { // nop
}
}

5
core/java/src/net/i2p/stat/Rate.java
View File

@ -454,7 +454,10 @@ public class Rate {
}
private final static long now() {
return Clock.getInstance().now();
// "event time" is in the stat log (and uses Clock).
// we just want sequential and stable time here, so use the OS time, since it doesn't
// skew periodically
return System.currentTimeMillis(); //Clock.getInstance().now();
}
public static void main(String args[]) {