* MA 02111-1307, USA.
*/
+#define _GNU_SOURCE
+
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <arpa/inet.h>
+#include <errno.h>
+#include <math.h>
+#include <netinet/in.h>
+#include <stddef.h>
#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
-#include "sync_chain_lttv.h"
+#include "lookup3.h"
+#include "sync_chain.h"
#include "event_analysis_eval.h"
// Functions specific to this module
static void registerAnalysisEval() __attribute__((constructor (102)));
+static guint ghfRttKeyHash(gconstpointer key);
+static gboolean gefRttKeyEqual(gconstpointer a, gconstpointer b);
+static void gdnDestroyRttKey(gpointer data);
+static void gdnDestroyDouble(gpointer data);
+static void readRttInfo(GHashTable* rttInfo, FILE* rttFile);
+static void positionStream(FILE* stream);
+
+static void gfSum(gpointer data, gpointer userData);
+static void gfSumSquares(gpointer data, gpointer userData);
static AnalysisModule analysisModuleEval= {
.writeAnalysisGraphsOptions= NULL,
};
+static ModuleOption optionEvalRttFile= {
+ .longName= "eval-rtt-file",
+ .hasArg= REQUIRED_ARG,
+ {.arg= NULL},
+ .optionHelp= "specify the file containing rtt information",
+ .argHelp= "FILE",
+};
+
/*
* Analysis module registering function
static void registerAnalysisEval()
{
g_queue_push_tail(&analysisModules, &analysisModuleEval);
+ g_queue_push_tail(&moduleOptions, &optionEvalRttFile);
}
analysisData= malloc(sizeof(AnalysisDataEval));
syncState->analysisData= analysisData;
- //readRttInfo(&analysisData->rttInfo, optionEvalRttFile);
+ analysisData->rttInfo= g_hash_table_new_full(&ghfRttKeyHash,
+ &gefRttKeyEqual, &gdnDestroyRttKey, &gdnDestroyDouble);
+ if (optionEvalRttFile.arg)
+ {
+ FILE* rttStream;
+ int retval;
+
+ rttStream= fopen(optionEvalRttFile.arg, "r");
+ if (rttStream == NULL)
+ {
+ g_error(strerror(errno));
+ }
+
+ readRttInfo(analysisData->rttInfo, rttStream);
+
+ retval= fclose(rttStream);
+ if (retval == EOF)
+ {
+ g_error(strerror(errno));
+ }
+ }
if (syncState->stats)
{
- analysisData->stats= malloc(sizeof(AnalysisStatsEval));
+ analysisData->stats= calloc(1, sizeof(AnalysisStatsEval));
analysisData->stats->broadcastDiffSum= 0.;
- analysisData->stats->allStats= malloc(syncState->traceNb *
- sizeof(TracePairStats*));
+ analysisData->stats->messageStats= malloc(syncState->traceNb *
+ sizeof(MessageStats*));
for (i= 0; i < syncState->traceNb; i++)
{
- analysisData->stats->allStats[i]= calloc(syncState->traceNb,
- sizeof(TracePairStats));
+ analysisData->stats->messageStats[i]= calloc(syncState->traceNb,
+ sizeof(MessageStats));
}
}
}
return;
}
- //g_hash_table_destroy(analysisData->rttInfo);
+ g_hash_table_destroy(analysisData->rttInfo);
analysisData->rttInfo= NULL;
if (syncState->stats)
{
for (i= 0; i < syncState->traceNb; i++)
{
- free(analysisData->stats->allStats[i]);
+ free(analysisData->stats->messageStats[i]);
}
- free(analysisData->stats->allStats);
+ free(analysisData->stats->messageStats);
free(analysisData->stats);
}
/*
* Perform analysis on an event pair.
*
+ * Check if there is message inversion or messages that are too fast.
+ *
* Args:
* syncState container for synchronization data
* message structure containing the events
static void analyzeMessageEval(SyncState* const syncState, Message* const message)
{
AnalysisDataEval* analysisData;
+ MessageStats* messageStats;
+ double* rttInfo;
+ double tt;
+ struct RttKey rttKey;
+
+ if (!syncState->stats)
+ {
+ return;
+ }
analysisData= (AnalysisDataEval*) syncState->analysisData;
+ messageStats=
+ &analysisData->stats->messageStats[message->outE->traceNum][message->inE->traceNum];
+
+ messageStats->total++;
+
+ tt= wallTimeSub(&message->inE->wallTime, &message->outE->wallTime);
+ if (tt <= 0)
+ {
+ messageStats->inversionNb++;
+ }
+
+ g_assert(message->inE->type == UDP);
+ rttKey.saddr= message->inE->event.udpEvent->datagramKey->saddr;
+ rttKey.daddr= message->inE->event.udpEvent->datagramKey->daddr;
+ rttInfo= g_hash_table_lookup(analysisData->rttInfo, &rttKey);
+
+ if (rttInfo)
+ {
+ if (tt < *rttInfo / 2.)
+ {
+ messageStats->tooFastNb++;
+ }
+ }
+ else
+ {
+ messageStats->noRTTInfoNb++;
+ }
}
/*
* Perform analysis on multiple messages
*
+ * Measure the RTT
+ *
* Args:
* syncState container for synchronization data
* exchange structure containing the messages
/*
* Perform analysis on muliple events
*
+ * Sum the broadcast differential delays
+ *
* Args:
* syncState container for synchronization data
* broadcast structure containing the events
static void analyzeBroadcastEval(SyncState* const syncState, Broadcast* const broadcast)
{
AnalysisDataEval* analysisData;
+ double sum= 0, squaresSum= 0;
+ double y;
+
+ if (!syncState->stats)
+ {
+ return;
+ }
analysisData= (AnalysisDataEval*) syncState->analysisData;
+
+ g_queue_foreach(broadcast->events, &gfSum, &sum);
+ g_queue_foreach(broadcast->events, &gfSumSquares, &squaresSum);
+
+ analysisData->stats->broadcastNb++;
+ // Because of numerical errors, this can at times be < 0
+ y= squaresSum / g_queue_get_length(broadcast->events) - pow(sum /
+ g_queue_get_length(broadcast->events), 2.);
+ if (y > 0)
+ {
+ analysisData->stats->broadcastDiffSum+= sqrt(y);
+ }
}
printf("Synchronization evaluation analysis stats:\n");
printf("\tsum of broadcast differential delays: %g\n",
analysisData->stats->broadcastDiffSum);
+ printf("\taverage broadcast differential delays: %g\n",
+ analysisData->stats->broadcastDiffSum /
+ analysisData->stats->broadcastNb);
printf("\tIndividual evaluation:\n"
- "\t\tTrace pair Inversions Too fast (No RTT info)\n");
+ "\t\tTrace pair Inversions Too fast (No RTT info) Total\n");
for (i= 0; i < syncState->traceNb; i++)
{
for (j= i + 1; j < syncState->traceNb; j++)
{
- TracePairStats* tpStats;
- const char* format= "\t\t%3d - %-3d %-10u %-10u %u\n";
+ MessageStats* messageStats;
+ const char* format= "\t\t%3d - %-3d %-10u %-10u %-10u %u\n";
- tpStats= &analysisData->stats->allStats[i][j];
+ messageStats= &analysisData->stats->messageStats[i][j];
- printf(format, i, j, tpStats->inversionNb, tpStats->tooFastNb,
- tpStats->noRTTInfoNb);
+ printf(format, i, j, messageStats->inversionNb, messageStats->tooFastNb,
+ messageStats->noRTTInfoNb, messageStats->total);
- tpStats= &analysisData->stats->allStats[j][i];
+ messageStats= &analysisData->stats->messageStats[j][i];
- printf(format, j, i, tpStats->inversionNb, tpStats->tooFastNb,
- tpStats->noRTTInfoNb);
+ printf(format, j, i, messageStats->inversionNb, messageStats->tooFastNb,
+ messageStats->noRTTInfoNb, messageStats->total);
}
}
}
+
+
+/*
+ * A GHashFunc for g_hash_table_new()
+ *
+ * Args:
+ * key struct RttKey*
+ */
+static guint ghfRttKeyHash(gconstpointer key)
+{
+ struct RttKey* rttKey;
+ uint32_t a, b, c;
+
+ rttKey= (struct RttKey*) key;
+
+ a= rttKey->saddr;
+ b= rttKey->daddr;
+ c= 0;
+ final(a, b, c);
+
+ return c;
+}
+
+
+/*
+ * A GDestroyNotify function for g_hash_table_new_full()
+ *
+ * Args:
+ * data: struct RttKey*
+ */
+static void gdnDestroyRttKey(gpointer data)
+{
+ free(data);
+}
+
+
+/*
+ * A GDestroyNotify function for g_hash_table_new_full()
+ *
+ * Args:
+ * data: double*
+ */
+static void gdnDestroyDouble(gpointer data)
+{
+ free(data);
+}
+
+
+/*
+ * A GEqualFunc for g_hash_table_new()
+ *
+ * Args:
+ * a, b RttKey*
+ *
+ * Returns:
+ * TRUE if both values are equal
+ */
+static gboolean gefRttKeyEqual(gconstpointer a, gconstpointer b)
+{
+ const struct RttKey* rkA, * rkB;
+
+ rkA= (struct RttKey*) a;
+ rkB= (struct RttKey*) b;
+
+ if (rkA->saddr == rkB->saddr && rkA->daddr == rkB->daddr)
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+
+
+/*
+ * Read a file contain minimum round trip time values and fill an array with
+ * them. The file is formatted as such:
+ * <host1 IP> <host2 IP> <RTT in milliseconds>
+ * ip's should be in dotted quad format
+ *
+ * Args:
+ * rttInfo: double* rttInfo[RttKey], empty table, will be filled
+ * rttStream: stream from which to read
+ */
+static void readRttInfo(GHashTable* rttInfo, FILE* rttStream)
+{
+ char* line= NULL;
+ size_t len;
+ int retval;
+
+ positionStream(rttStream);
+ retval= getline(&line, &len, rttStream);
+ while(!feof(rttStream))
+ {
+ struct RttKey* rttKey;
+ char saddrDQ[20], daddrDQ[20];
+ double* rtt;
+ char tmp;
+ struct in_addr addr;
+ unsigned int i;
+ struct {
+ char* dq;
+ size_t offset;
+ } loopValues[] = {
+ {saddrDQ, offsetof(struct RttKey, saddr)},
+ {daddrDQ, offsetof(struct RttKey, daddr)}
+ };
+
+ if (retval == -1 && !feof(rttStream))
+ {
+ g_error(strerror(errno));
+ }
+
+ if (line[retval - 1] == '\n')
+ {
+ line[retval - 1]= '\0';
+ }
+
+ rtt= malloc(sizeof(double));
+ retval= sscanf(line, " %19s %19s %lf %c", saddrDQ, daddrDQ, rtt,
+ &tmp);
+ if (retval == EOF)
+ {
+ g_error(strerror(errno));
+ }
+ else if (retval != 3)
+ {
+ g_error("Error parsing RTT file, line was '%s'", line);
+ }
+
+ rttKey= malloc(sizeof(struct RttKey));
+ for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++)
+ {
+ retval= inet_aton(loopValues[i].dq, &addr);
+ if (retval == 0)
+ {
+ g_error("Error converting address '%s'", loopValues[i].dq);
+ }
+ *(uint32_t*) ((void*) rttKey + loopValues[i].offset)=
+ addr.s_addr;
+ }
+
+ *rtt/= 1e3;
+ g_hash_table_insert(rttInfo, rttKey, rtt);
+
+ positionStream(rttStream);
+ retval= getline(&line, &len, rttStream);
+ }
+
+ if (line)
+ {
+ free(line);
+ }
+}
+
+
+/*
+ * Advance stream over empty space, empty lines and lines that begin with '#'
+ *
+ * Args:
+ * stream: stream, at exit, will be over the first non-empty character
+ * of a line of be at EOF
+ */
+static void positionStream(FILE* stream)
+{
+ int firstChar;
+ ssize_t retval;
+ char* line= NULL;
+ size_t len;
+
+ do
+ {
+ firstChar= fgetc(stream);
+ if (firstChar == (int) '#')
+ {
+ retval= getline(&line, &len, stream);
+ if (retval == -1)
+ {
+ if (feof(stream))
+ {
+ goto outEof;
+ }
+ else
+ {
+ g_error(strerror(errno));
+ }
+ }
+ }
+ else if (firstChar == (int) '\n' || firstChar == (int) ' ' ||
+ firstChar == (int) '\t')
+ {}
+ else if (firstChar == EOF)
+ {
+ goto outEof;
+ }
+ else
+ {
+ break;
+ }
+ } while (true);
+ retval= ungetc(firstChar, stream);
+ if (retval == EOF)
+ {
+ g_error("Error: ungetc()");
+ }
+
+outEof:
+ if (line)
+ {
+ free(line);
+ }
+}
+
+
+/*
+ * A GFunc for g_queue_foreach()
+ *
+ * Args:
+ * data Event*, a UDP broadcast event
+ * user_data double*, the running sum
+ *
+ * Returns:
+ * Adds the time of the event to the sum
+ */
+static void gfSum(gpointer data, gpointer userData)
+{
+ Event* event= (Event*) data;
+
+ *(double*) userData+= event->wallTime.seconds + event->wallTime.nanosec /
+ 1e9;
+}
+
+
+/*
+ * A GFunc for g_queue_foreach()
+ *
+ * Args:
+ * data Event*, a UDP broadcast event
+ * user_data double*, the running sum
+ *
+ * Returns:
+ * Adds the square of the time of the event to the sum
+ */
+static void gfSumSquares(gpointer data, gpointer userData)
+{
+ Event* event= (Event*) data;
+
+ *(double*) userData+= pow(event->wallTime.seconds + event->wallTime.nanosec
+ / 1e9, 2.);
+}
projects / lttv.git / blobdiff