X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttv%2Flttv%2Fsync%2Fevent_analysis_eval.c;h=8dbf5bb60ec3439fa26b53e37c7502a609a1f23a;hb=df64b31664467d7217fa08fcdee423577856b38a;hp=05a49acca39c9c1114245e53a9e2c6b6f87fd6cb;hpb=2bd4b3e43e525da7b4c9738915ec847f7fe4906a;p=lttv.git diff --git a/lttv/lttv/sync/event_analysis_eval.c b/lttv/lttv/sync/event_analysis_eval.c index 05a49acc..8dbf5bb6 100644 --- a/lttv/lttv/sync/event_analysis_eval.c +++ b/lttv/lttv/sync/event_analysis_eval.c @@ -1,22 +1,22 @@ /* This file is part of the Linux Trace Toolkit viewer - * Copyright (C) 2009 Benjamin Poirier + * Copyright (C) 2009, 2010 Benjamin Poirier * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License Version 2 as - * published by the Free Software Foundation; + * This program is free software: you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 2.1 of the License, or (at + * your option) any later version. * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see . */ #define _GNU_SOURCE +#define _ISOC99_SOURCE #ifdef HAVE_CONFIG_H #include @@ -24,12 +24,14 @@ #include #include +#include #include #include #include #include #include #include +#include #include "lookup3.h" #include "sync_chain.h" @@ -37,6 +39,12 @@ #include "event_analysis_eval.h" +struct WriteHistogramInfo +{ + GHashTable* rttInfo; + FILE* graphsStream; +}; + // Functions common to all analysis modules static void initAnalysisEval(SyncState* const syncState); static void destroyAnalysisEval(SyncState* const syncState); @@ -47,11 +55,14 @@ static void analyzeExchangeEval(SyncState* const syncState, Exchange* const exchange); static void analyzeBroadcastEval(SyncState* const syncState, Broadcast* const broadcast); -static GArray* finalizeAnalysisEval(SyncState* const syncState); +static AllFactors* finalizeAnalysisEval(SyncState* const syncState); static void printAnalysisStatsEval(SyncState* const syncState); +static void writeAnalysisTraceTimeBackPlotsEval(SyncState* const syncState, + const unsigned int i, const unsigned int j); +static void writeAnalysisTraceTimeForePlotsEval(SyncState* const syncState, + const unsigned int i, const unsigned int j); // 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); @@ -59,6 +70,34 @@ 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 void ghfPrintExchangeRtt(gpointer key, gpointer value, gpointer + user_data); + +static void hitBin(struct Bins* const bins, const double value); +static unsigned int binNum(const double value) __attribute__((pure)); +static double binStart(const unsigned int binNum) __attribute__((pure)); +static double binEnd(const unsigned int binNum) __attribute__((pure)); +static uint32_t normalTotal(struct Bins* const bins) __attribute__((const)); + +static AnalysisHistogramEval* constructAnalysisHistogramEval(const char* const + graphsDir, const struct RttKey* const rttKey); +static void destroyAnalysisHistogramEval(AnalysisHistogramEval* const + histogram); +static void gdnDestroyAnalysisHistogramEval(gpointer data); +static void ghfWriteHistogram(gpointer key, gpointer value, gpointer + user_data); +static void dumpBinToFile(const struct Bins* const bins, FILE* const file); +static void writeHistogram(FILE* graphsStream, const struct RttKey* rttKey, + double* minRtt, AnalysisHistogramEval* const histogram); + +static void updateBounds(Bounds** const bounds, Event* const e1, Event* const + e2); + + +// initialized in registerAnalysisEval() +double binBase; static AnalysisModule analysisModuleEval= { .name= "eval", @@ -69,15 +108,16 @@ static AnalysisModule analysisModuleEval= { .analyzeBroadcast= &analyzeBroadcastEval, .finalizeAnalysis= &finalizeAnalysisEval, .printAnalysisStats= &printAnalysisStatsEval, - .writeAnalysisGraphsPlots= NULL, - .writeAnalysisGraphsOptions= NULL, + .graphFunctions= { + .writeTraceTimeBackPlots= &writeAnalysisTraceTimeBackPlotsEval, + .writeTraceTimeForePlots= &writeAnalysisTraceTimeForePlotsEval, + } }; static ModuleOption optionEvalRttFile= { .longName= "eval-rtt-file", .hasArg= REQUIRED_ARG, - {.arg= NULL}, - .optionHelp= "specify the file containing rtt information", + .optionHelp= "specify the file containing RTT information", .argHelp= "FILE", }; @@ -85,8 +125,10 @@ static ModuleOption optionEvalRttFile= { /* * Analysis module registering function */ -static void registerAnalysisEval() +void registerAnalysisEval() { + binBase= exp10(6. / (BIN_NB - 3)); + g_queue_push_tail(&analysisModules, &analysisModuleEval); g_queue_push_tail(&moduleOptions, &optionEvalRttFile); } @@ -104,7 +146,7 @@ static void registerAnalysisEval() static void initAnalysisEval(SyncState* const syncState) { AnalysisDataEval* analysisData; - unsigned int i; + unsigned int i, j; analysisData= malloc(sizeof(AnalysisDataEval)); syncState->analysisData= analysisData; @@ -119,7 +161,7 @@ static void initAnalysisEval(SyncState* const syncState) rttStream= fopen(optionEvalRttFile.arg, "r"); if (rttStream == NULL) { - g_error(strerror(errno)); + g_error("%s", strerror(errno)); } readRttInfo(analysisData->rttInfo, rttStream); @@ -127,22 +169,307 @@ static void initAnalysisEval(SyncState* const syncState) retval= fclose(rttStream); if (retval == EOF) { - g_error(strerror(errno)); + g_error("%s", strerror(errno)); } } if (syncState->stats) { - analysisData->stats= malloc(sizeof(AnalysisStatsEval)); - analysisData->stats->broadcastDiffSum= 0.; + analysisData->stats= calloc(1, sizeof(AnalysisStatsEval)); + analysisData->stats->broadcastRangeMin= INFINITY; + analysisData->stats->broadcastRangeMax= -INFINITY; - 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)); + } + + analysisData->stats->exchangeRtt= + g_hash_table_new_full(&ghfRttKeyHash, &gefRttKeyEqual, + &gdnDestroyRttKey, &gdnDestroyDouble); + } + + if (syncState->graphsStream) + { + AnalysisGraphsEval* graphs= malloc(sizeof(AnalysisGraphsEval)); + GList* result; + + analysisData->graphs= graphs; + + graphs->histograms= g_hash_table_new_full(&ghfRttKeyHash, + &gefRttKeyEqual, &gdnDestroyRttKey, + &gdnDestroyAnalysisHistogramEval); + + graphs->bounds= malloc(syncState->traceNb * sizeof(Bounds*)); + for (i= 0; i < syncState->traceNb; i++) + { + graphs->bounds[i]= malloc(i * sizeof(Bounds)); + for (j= 0; j < i; j++) + { + graphs->bounds[i][j].min= UINT64_MAX; + graphs->bounds[i][j].max= 0; + } + } + + graphs->chullSS= (SyncState*) malloc(sizeof(SyncState)); + memcpy(graphs->chullSS, syncState, sizeof(SyncState)); + graphs->chullSS->analysisData= NULL; + result= g_queue_find_custom(&analysisModules, "chull", &gcfCompareAnalysis); + g_assert(result != NULL); + graphs->chullSS->analysisModule= (AnalysisModule*) result->data; + graphs->chullSS->analysisModule->initAnalysis(graphs->chullSS); + } +} + + +/* + * Create and open files used to store histogram points to generate graphs. + * Create data structures to store histogram points during analysis. + * + * Args: + * graphsDir: folder where to write files + * rttKey: host pair, make sure saddr < daddr + */ +static AnalysisHistogramEval* constructAnalysisHistogramEval(const char* const + graphsDir, const struct RttKey* const rttKey) +{ + int retval; + unsigned int i; + char* cwd; + char name[60], saddr[16], daddr[16]; + AnalysisHistogramEval* histogram= calloc(1, sizeof(*histogram)); + const struct { + size_t pointsOffset; + const char* fileName; + const char* host1, *host2; + } loopValues[]= { + {offsetof(AnalysisHistogramEval, ttSendPoints), + "analysis_eval_tt-%s_to_%s.data", saddr, daddr}, + {offsetof(AnalysisHistogramEval, ttRecvPoints), + "analysis_eval_tt-%s_to_%s.data", daddr, saddr}, + {offsetof(AnalysisHistogramEval, hrttPoints), + "analysis_eval_hrtt-%s_and_%s.data", saddr, daddr}, + }; + + histogram->ttSendBins.min= BIN_NB - 1; + histogram->ttRecvBins.min= BIN_NB - 1; + histogram->hrttBins.min= BIN_NB - 1; + + convertIP(saddr, rttKey->saddr); + convertIP(daddr, rttKey->daddr); + + cwd= changeToGraphsDir(graphsDir); + + for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) + { + retval= snprintf(name, sizeof(name), loopValues[i].fileName, + loopValues[i].host1, loopValues[i].host2); + if (retval > sizeof(name) - 1) + { + name[sizeof(name) - 1]= '\0'; + } + if ((*(FILE**)((void*) histogram + loopValues[i].pointsOffset)= + fopen(name, "w")) == NULL) + { + g_error("%s", strerror(errno)); + } + } + + retval= chdir(cwd); + if (retval == -1) + { + g_error("%s", strerror(errno)); + } + free(cwd); + + return histogram; +} + + +/* + * Close files used to store histogram points to generate graphs. + * + * Args: + * graphsDir: folder where to write files + * rttKey: host pair, make sure saddr < daddr + */ +static void destroyAnalysisHistogramEval(AnalysisHistogramEval* const + histogram) +{ + unsigned int i; + int retval; + const struct { + size_t pointsOffset; + } loopValues[]= { + {offsetof(AnalysisHistogramEval, ttSendPoints)}, + {offsetof(AnalysisHistogramEval, ttRecvPoints)}, + {offsetof(AnalysisHistogramEval, hrttPoints)}, + }; + + for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) + { + retval= fclose(*(FILE**)((void*) histogram + loopValues[i].pointsOffset)); + if (retval != 0) + { + g_error("%s", strerror(errno)); + } + } + + free(histogram); +} + + +/* + * A GDestroyNotify function for g_hash_table_new_full() + * + * Args: + * data: AnalysisHistogramEval* + */ +static void gdnDestroyAnalysisHistogramEval(gpointer data) +{ + destroyAnalysisHistogramEval(data); +} + + +/* + * A GHFunc for g_hash_table_foreach() + * + * Args: + * key: RttKey* where saddr < daddr + * value: AnalysisHistogramEval* + * user_data struct WriteHistogramInfo* + */ +static void ghfWriteHistogram(gpointer key, gpointer value, gpointer user_data) +{ + double* rtt1, * rtt2; + struct RttKey* rttKey= key; + struct RttKey oppositeRttKey= {.saddr= rttKey->daddr, .daddr= + rttKey->saddr}; + AnalysisHistogramEval* histogram= value; + struct WriteHistogramInfo* info= user_data; + + rtt1= g_hash_table_lookup(info->rttInfo, rttKey); + rtt2= g_hash_table_lookup(info->rttInfo, &oppositeRttKey); + + if (rtt1 == NULL) + { + rtt1= rtt2; + } + else if (rtt2 != NULL) + { + rtt1= MIN(rtt1, rtt2); + } + + dumpBinToFile(&histogram->ttSendBins, histogram->ttSendPoints); + dumpBinToFile(&histogram->ttRecvBins, histogram->ttRecvPoints); + dumpBinToFile(&histogram->hrttBins, histogram->hrttPoints); + writeHistogram(info->graphsStream, rttKey, rtt1, histogram); +} + + +/* + * Write the content of one bin in a histogram point file + * + * Args: + * bin: array of values that make up a histogram + * file: FILE*, write to this file + */ +static void dumpBinToFile(const struct Bins* const bins, FILE* const file) +{ + unsigned int i; + + // The first and last bins are skipped, see struct Bins + for (i= 1; i < BIN_NB - 1; i++) + { + if (bins->bin[i] > 0) + { + fprintf(file, "%20.9f %20.9f %20.9f\n", (binStart(i) + binEnd(i)) + / 2., (double) bins->bin[i] / ((binEnd(i) - binStart(i)) * + bins->total), binEnd(i) - binStart(i)); + } + } +} + + +/* + * Write the analysis-specific plot in the gnuplot script. + * + * Args: + * graphsStream: write to this file + * rttKey: must be sorted such that saddr < daddr + * minRtt: if available, else NULL + * histogram: struct that contains the bins for the pair of traces + * identified by rttKey + */ +static void writeHistogram(FILE* graphsStream, const struct RttKey* rttKey, + double* minRtt, AnalysisHistogramEval* const histogram) +{ + char saddr[16], daddr[16]; + + convertIP(saddr, rttKey->saddr); + convertIP(daddr, rttKey->daddr); + + fprintf(graphsStream, + "\nreset\n" + "set output \"histogram-%s-%s.eps\"\n" + "set title \"\"\n" + "set xlabel \"Message Latency (s)\"\n" + "set ylabel \"Proportion of messages per second\"\n", saddr, daddr); + + if (minRtt != NULL) + { + fprintf(graphsStream, + "set arrow from %.9f, 0 rto 0, graph 1 " + "nohead linetype 3 linewidth 3 linecolor rgb \"black\"\n", *minRtt + / 2); + } + + if (normalTotal(&histogram->ttSendBins) || + normalTotal(&histogram->ttRecvBins) || + normalTotal(&histogram->hrttBins)) + { + fprintf(graphsStream, "plot \\\n"); + + if (normalTotal(&histogram->hrttBins)) + { + fprintf(graphsStream, + "\t\"analysis_eval_hrtt-%s_and_%s.data\" " + "title \"RTT/2\" with linespoints linetype 1 linewidth 2 " + "linecolor rgb \"black\" pointtype 6 pointsize 1,\\\n", + saddr, daddr); } + + if (normalTotal(&histogram->ttSendBins)) + { + fprintf(graphsStream, + "\t\"analysis_eval_tt-%1$s_to_%2$s.data\" " + "title \"%1$s to %2$s\" with linespoints linetype 4 linewidth 2 " + "linecolor rgb \"gray60\" pointtype 6 pointsize 1,\\\n", + saddr, daddr); + } + + if (normalTotal(&histogram->ttRecvBins)) + { + fprintf(graphsStream, + "\t\"analysis_eval_tt-%1$s_to_%2$s.data\" " + "title \"%1$s to %2$s\" with linespoints linetype 4 linewidth 2 " + "linecolor rgb \"gray30\" pointtype 6 pointsize 1,\\\n", + daddr, saddr); + } + + // Remove the ",\\\n" from the last graph plot line + if (ftruncate(fileno(graphsStream), ftell(graphsStream) - 3) == -1) + { + g_error("%s", strerror(errno)); + } + if (fseek(graphsStream, 0, SEEK_END) == -1) + { + g_error("%s", strerror(errno)); + } + fprintf(graphsStream, "\n"); } } @@ -162,22 +489,47 @@ static void destroyAnalysisEval(SyncState* const syncState) analysisData= (AnalysisDataEval*) syncState->analysisData; - if (analysisData == NULL || analysisData->rttInfo == NULL) + if (analysisData == NULL) { return; } g_hash_table_destroy(analysisData->rttInfo); - analysisData->rttInfo= NULL; if (syncState->stats) { + AnalysisStatsEval* stats= analysisData->stats; + + for (i= 0; i < syncState->traceNb; i++) + { + free(stats->messageStats[i]); + } + free(stats->messageStats); + + g_hash_table_destroy(stats->exchangeRtt); + + free(stats); + } + + if (syncState->graphsStream) + { + AnalysisGraphsEval* graphs= analysisData->graphs; + + if (graphs->histograms) + { + g_hash_table_destroy(graphs->histograms); + } + for (i= 0; i < syncState->traceNb; i++) { - free(analysisData->stats->allStats[i]); + free(graphs->bounds[i]); } - free(analysisData->stats->allStats); - free(analysisData->stats); + free(graphs->bounds); + + graphs->chullSS->analysisModule->destroyAnalysis(graphs->chullSS); + free(graphs->chullSS); + + free(graphs); } free(syncState->analysisData); @@ -188,78 +540,315 @@ static void destroyAnalysisEval(SyncState* const syncState) /* * 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) +static void analyzeMessageEval(SyncState* const syncState, Message* const + message) { - AnalysisDataEval* analysisData; + AnalysisDataEval* analysisData= syncState->analysisData; + MessageStats* messageStats = NULL; /* for gcc */ + double* rtt; + double tt; + struct RttKey rttKey; - analysisData= (AnalysisDataEval*) syncState->analysisData; + g_assert(message->inE->type == TCP); + + if (syncState->stats) + { + messageStats= + &analysisData->stats->messageStats[message->outE->traceNum][message->inE->traceNum]; + messageStats->total++; + } + + tt= wallTimeSub(&message->inE->wallTime, &message->outE->wallTime); + if (tt <= 0) + { + if (syncState->stats) + { + messageStats->inversionNb++; + } + } + else if (syncState->graphsStream) + { + struct RttKey rttKey= { + .saddr=MIN(message->inE->event.tcpEvent->segmentKey->connectionKey.saddr, + message->inE->event.tcpEvent->segmentKey->connectionKey.daddr), + .daddr=MAX(message->inE->event.tcpEvent->segmentKey->connectionKey.saddr, + message->inE->event.tcpEvent->segmentKey->connectionKey.daddr), + }; + AnalysisHistogramEval* histogram= + g_hash_table_lookup(analysisData->graphs->histograms, &rttKey); + + if (histogram == NULL) + { + struct RttKey* tableKey= malloc(sizeof(*tableKey)); + + histogram= constructAnalysisHistogramEval(syncState->graphsDir, &rttKey); + memcpy(tableKey, &rttKey, sizeof(*tableKey)); + g_hash_table_insert(analysisData->graphs->histograms, tableKey, histogram); + } + + if (message->inE->event.udpEvent->datagramKey->saddr < + message->inE->event.udpEvent->datagramKey->daddr) + { + hitBin(&histogram->ttSendBins, tt); + } + else + { + hitBin(&histogram->ttRecvBins, tt); + } + } + + if (syncState->stats) + { + rttKey.saddr= + message->inE->event.tcpEvent->segmentKey->connectionKey.saddr; + rttKey.daddr= + message->inE->event.tcpEvent->segmentKey->connectionKey.daddr; + rtt= g_hash_table_lookup(analysisData->rttInfo, &rttKey); + g_debug("rttInfo, looking up (%u, %u)->(%f)", rttKey.saddr, + rttKey.daddr, rtt ? *rtt : NAN); + + if (rtt) + { + g_debug("rttInfo, tt: %f rtt / 2: %f", tt, *rtt / 2.); + if (tt < *rtt / 2.) + { + messageStats->tooFastNb++; + } + } + else + { + messageStats->noRTTInfoNb++; + } + } + + if (syncState->graphsStream) + { + updateBounds(analysisData->graphs->bounds, message->inE, + message->outE); + + analysisData->graphs->chullSS->analysisModule->analyzeMessage(analysisData->graphs->chullSS, + message); + } } /* * Perform analysis on multiple messages * + * Measure the RTT + * * Args: * syncState container for synchronization data * exchange structure containing the messages */ -static void analyzeExchangeEval(SyncState* const syncState, Exchange* const exchange) +static void analyzeExchangeEval(SyncState* const syncState, Exchange* const + exchange) { - AnalysisDataEval* analysisData; + AnalysisDataEval* analysisData= syncState->analysisData; + Message* m1= g_queue_peek_tail(exchange->acks); + Message* m2= exchange->message; + struct RttKey* rttKey; + double* rtt, * exchangeRtt; - analysisData= (AnalysisDataEval*) syncState->analysisData; + g_assert(m1->inE->type == TCP); + + // (T2 - T1) - (T3 - T4) + rtt= malloc(sizeof(double)); + *rtt= wallTimeSub(&m1->inE->wallTime, &m1->outE->wallTime) - + wallTimeSub(&m2->outE->wallTime, &m2->inE->wallTime); + + rttKey= malloc(sizeof(struct RttKey)); + rttKey->saddr= + MIN(m1->inE->event.tcpEvent->segmentKey->connectionKey.saddr, + m1->inE->event.tcpEvent->segmentKey->connectionKey.daddr); + rttKey->daddr= + MAX(m1->inE->event.tcpEvent->segmentKey->connectionKey.saddr, + m1->inE->event.tcpEvent->segmentKey->connectionKey.daddr); + + if (syncState->graphsStream) + { + AnalysisHistogramEval* histogram= + g_hash_table_lookup(analysisData->graphs->histograms, rttKey); + + if (histogram == NULL) + { + struct RttKey* tableKey= malloc(sizeof(*tableKey)); + + histogram= constructAnalysisHistogramEval(syncState->graphsDir, + rttKey); + memcpy(tableKey, rttKey, sizeof(*tableKey)); + g_hash_table_insert(analysisData->graphs->histograms, tableKey, + histogram); + } + + hitBin(&histogram->hrttBins, *rtt / 2); + } + + if (syncState->stats) + { + exchangeRtt= g_hash_table_lookup(analysisData->stats->exchangeRtt, + rttKey); + + if (exchangeRtt) + { + if (*rtt < *exchangeRtt) + { + g_hash_table_replace(analysisData->stats->exchangeRtt, rttKey, rtt); + } + else + { + free(rttKey); + free(rtt); + } + } + else + { + g_hash_table_insert(analysisData->stats->exchangeRtt, rttKey, rtt); + } + } + else + { + free(rttKey); + free(rtt); + } } /* * 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) +static void analyzeBroadcastEval(SyncState* const syncState, Broadcast* const + broadcast) { - AnalysisDataEval* analysisData; + AnalysisDataEval* analysisData= syncState->analysisData; - analysisData= (AnalysisDataEval*) syncState->analysisData; + if (syncState->stats) + { + double sum= 0, squaresSum= 0; + double y; + + 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->broadcastStdevSum+= sqrt(y); + } + + if (syncState->traceNb == 2 && g_queue_get_length(broadcast->events) + == 2) + { + Event* e0, * e1; + double dd; + + e0= g_queue_peek_head(broadcast->events); + e1= g_queue_peek_tail(broadcast->events); + if (e0->traceNum > e1->traceNum) + { + Event* tmp; + + tmp= e0; + e0= e1; + e1= tmp; + } + + dd= wallTimeSub(&e1->wallTime, &e0->wallTime); + + analysisData->stats->broadcastPairNb++; + if (dd < analysisData->stats->broadcastRangeMin) + { + analysisData->stats->broadcastRangeMin= dd; + } + if (dd > analysisData->stats->broadcastRangeMax) + { + analysisData->stats->broadcastRangeMax= dd; + } + + analysisData->stats->broadcastSum+= dd; + analysisData->stats->broadcastSumSquares+= pow(dd, 2); + } + } + + if (syncState->graphsStream) + { + unsigned int i, j; + GArray* events; + unsigned int eventNb= broadcast->events->length; + + events= g_array_sized_new(FALSE, FALSE, sizeof(Event*), eventNb); + g_queue_foreach(broadcast->events, &gfAddEventToArray, events); + + for (i= 0; i < eventNb; i++) + { + for (j= 0; j < eventNb; j++) + { + Event* eventI= g_array_index(events, Event*, i), * eventJ= + g_array_index(events, Event*, j); + + if (eventI->traceNum < eventJ->traceNum) + { + updateBounds(analysisData->graphs->bounds, eventI, eventJ); + } + } + } + + g_array_free(events, TRUE); + } } /* - * Finalize the factor calculations - * - * Since this module does not really calculate factors, identity factors are - * returned. + * Finalize the factor calculations. Since this module does not really + * calculate factors, absent factors are returned. Instead, histograms are + * written out and histogram structures are freed. * * Args: * syncState container for synchronization data. * * Returns: - * Factors[traceNb] synchronization factors for each trace + * AllFactors* synchronization factors for each trace pair */ -static GArray* finalizeAnalysisEval(SyncState* const syncState) +static AllFactors* finalizeAnalysisEval(SyncState* const syncState) { - GArray* factors; - unsigned int i; + AnalysisDataEval* analysisData= syncState->analysisData; - factors= g_array_sized_new(FALSE, FALSE, sizeof(Factors), - syncState->traceNb); - g_array_set_size(factors, syncState->traceNb); - for (i= 0; i < syncState->traceNb; i++) + /* This function may be run twice because of matching_distributor. This + * check is there to make sure the next block is run only once. + */ + if (syncState->graphsStream && analysisData->graphs->histograms) { - Factors* e; + g_hash_table_foreach(analysisData->graphs->histograms, + &ghfWriteHistogram, &(struct WriteHistogramInfo) {.rttInfo= + analysisData->rttInfo, .graphsStream= syncState->graphsStream}); + g_hash_table_destroy(analysisData->graphs->histograms); + analysisData->graphs->histograms= NULL; + + if (syncState->graphsStream) + { + SyncState* chullSS= analysisData->graphs->chullSS; - e= &g_array_index(factors, Factors, i); - e->drift= 1.; - e->offset= 0.; + freeAllFactors(chullSS->analysisModule->finalizeAnalysis(chullSS), + chullSS->traceNb); + } } - return factors; + return createAllFactors(syncState->traceNb); } @@ -273,7 +862,9 @@ static GArray* finalizeAnalysisEval(SyncState* const syncState) static void printAnalysisStatsEval(SyncState* const syncState) { AnalysisDataEval* analysisData; - unsigned int i, j; + unsigned int i, j, k; + unsigned int totInversion= 0, totTooFast= 0, totNoInfo= 0, totTotal= 0; + int charNb; if (!syncState->stats) { @@ -283,30 +874,131 @@ static void printAnalysisStatsEval(SyncState* const syncState) analysisData= (AnalysisDataEval*) syncState->analysisData; printf("Synchronization evaluation analysis stats:\n"); - printf("\tsum of broadcast differential delays: %g\n", - analysisData->stats->broadcastDiffSum); + if (analysisData->stats->broadcastNb) + { + printf("\tBroadcast differential delay:\n"); + printf("\t\tsum of standard deviations: %g\n", + analysisData->stats->broadcastStdevSum); + printf("\t\taverage standard deviation: %g\n", + analysisData->stats->broadcastStdevSum / + analysisData->stats->broadcastNb); + + if (syncState->traceNb == 2) + { + printf("\t\tdifferential delay range: [ %g .. %g ]\n", + analysisData->stats->broadcastRangeMin, + analysisData->stats->broadcastRangeMax); + printf("\t\tdifferential delay average: %g\n", + analysisData->stats->broadcastSum / + analysisData->stats->broadcastPairNb); + printf("\t\tdifferential delay standard deviation: %g\n", + sqrt(analysisData->stats->broadcastSumSquares / + analysisData->stats->broadcastPairNb - + pow(analysisData->stats->broadcastSum / + analysisData->stats->broadcastPairNb, 2))); + } + } 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; + struct { + unsigned int t1, t2; + } loopValues[]= { + {i, j}, + {j, i} + }; + + for (k= 0; k < sizeof(loopValues) / sizeof(*loopValues); k++) + { + messageStats= + &analysisData->stats->messageStats[loopValues[k].t1][loopValues[k].t2]; + + printf("\t\t%3d - %-3d ", loopValues[k].t1, loopValues[k].t2); + printf("%u (%.2f%%)%n", messageStats->inversionNb, (double) + messageStats->inversionNb / messageStats->total * 100, + &charNb); + printf("%*s", 17 - charNb > 0 ? 17 - charNb + 1: 1, " "); + printf("%u (%.2f%%)%n", messageStats->tooFastNb, (double) + messageStats->tooFastNb / messageStats->total * 100, + &charNb); + printf("%*s%-10u %u\n", 17 - charNb > 0 ? 17 - charNb + 1: + 1, " ", messageStats->noRTTInfoNb, messageStats->total); + + totInversion+= messageStats->inversionNb; + totTooFast+= messageStats->tooFastNb; + totNoInfo+= messageStats->noRTTInfoNb; + totTotal+= messageStats->total; + } + } + } + + printf("\t\t total "); + printf("%u (%.2f%%)%n", totInversion, (double) totInversion / totTotal * + 100, &charNb); + printf("%*s", 17 - charNb > 0 ? 17 - charNb + 1: 1, " "); + printf("%u (%.2f%%)%n", totTooFast, (double) totTooFast / totTotal * 100, + &charNb); + printf("%*s%-10u %u\n", 17 - charNb > 0 ? 17 - charNb + 1: 1, " ", + totNoInfo, totTotal); + + printf("\tRound-trip times:\n" + "\t\tHost pair RTT from exchanges RTTs from file (ms)\n"); + g_hash_table_foreach(analysisData->stats->exchangeRtt, + &ghfPrintExchangeRtt, analysisData->rttInfo); +} + + +/* + * A GHFunc for g_hash_table_foreach() + * + * Args: + * key: RttKey* where saddr < daddr + * value: double*, RTT estimated from exchanges + * user_data GHashTable* rttInfo + */ +static void ghfPrintExchangeRtt(gpointer key, gpointer value, gpointer + user_data) +{ + char addr1[16], addr2[16]; + struct RttKey* rttKey1= key; + struct RttKey rttKey2= {rttKey1->daddr, rttKey1->saddr}; + double* fileRtt1, *fileRtt2; + GHashTable* rttInfo= user_data; - tpStats= &analysisData->stats->allStats[i][j]; + convertIP(addr1, rttKey1->saddr); + convertIP(addr2, rttKey1->daddr); - printf(format, i, j, tpStats->inversionNb, tpStats->tooFastNb, - tpStats->noRTTInfoNb); + fileRtt1= g_hash_table_lookup(rttInfo, rttKey1); + fileRtt2= g_hash_table_lookup(rttInfo, &rttKey2); - tpStats= &analysisData->stats->allStats[j][i]; + printf("\t\t(%15s, %-15s) %-18.3f ", addr1, addr2, *(double*) value * 1e3); - printf(format, j, i, tpStats->inversionNb, tpStats->tooFastNb, - tpStats->noRTTInfoNb); + if (fileRtt1 || fileRtt2) + { + if (fileRtt1) + { + printf("%.3f", *fileRtt1 * 1e3); + } + if (fileRtt1 && fileRtt2) + { + printf(", "); + } + if (fileRtt2) + { + printf("%.3f", *fileRtt2 * 1e3); } } + else + { + printf("-"); + } + printf("\n"); } @@ -419,7 +1111,7 @@ static void readRttInfo(GHashTable* rttInfo, FILE* rttStream) if (retval == -1 && !feof(rttStream)) { - g_error(strerror(errno)); + g_error("%s", strerror(errno)); } if (line[retval - 1] == '\n') @@ -432,7 +1124,7 @@ static void readRttInfo(GHashTable* rttInfo, FILE* rttStream) &tmp); if (retval == EOF) { - g_error(strerror(errno)); + g_error("%s", strerror(errno)); } else if (retval != 3) { @@ -451,6 +1143,9 @@ static void readRttInfo(GHashTable* rttInfo, FILE* rttStream) addr.s_addr; } + *rtt/= 1e3; + g_debug("rttInfo, Inserting (%u, %u)->(%f)", rttKey->saddr, + rttKey->daddr, *rtt); g_hash_table_insert(rttInfo, rttKey, rtt); positionStream(rttStream); @@ -492,7 +1187,7 @@ static void positionStream(FILE* stream) } else { - g_error(strerror(errno)); + g_error("%s", strerror(errno)); } } } @@ -520,3 +1215,259 @@ outEof: 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.); +} + + +/* + * Update a struct Bins according to a new value + * + * Args: + * bins: the structure containing bins to build a histrogram + * value: the new value + */ +static void hitBin(struct Bins* const bins, const double value) +{ + unsigned int binN= binNum(value); + + if (binN < bins->min) + { + bins->min= binN; + } + else if (binN > bins->max) + { + bins->max= binN; + } + + bins->total++; + + bins->bin[binN]++; +} + + +/* + * Figure out the bin in a histogram to which a value belongs. + * + * This uses exponentially sized bins that go from 0 to infinity. + * + * Args: + * value: in the range -INFINITY to INFINITY + * + * Returns: + * The number of the bin in a struct Bins.bin + */ +static unsigned int binNum(const double value) +{ + if (value <= 0) + { + return 0; + } + else if (value < binEnd(1)) + { + return 1; + } + else if (value >= binStart(BIN_NB - 1)) + { + return BIN_NB - 1; + } + else + { + return floor(log(value) / log(binBase)) + BIN_NB + 1; + } +} + + +/* + * Figure out the start of the interval of a bin in a histogram. See struct + * Bins. + * + * This uses exponentially sized bins that go from 0 to infinity. + * + * Args: + * binNum: bin number + * + * Return: + * The start of the interval, this value is included in the interval (except + * for -INFINITY, naturally) + */ +static double binStart(const unsigned int binNum) +{ + g_assert_cmpuint(binNum, <, BIN_NB); + + if (binNum == 0) + { + return -INFINITY; + } + else if (binNum == 1) + { + return 0.; + } + else + { + return pow(binBase, (double) binNum - BIN_NB + 1); + } +} + + +/* + * Figure out the end of the interval of a bin in a histogram. See struct + * Bins. + * + * This uses exponentially sized bins that go from 0 to infinity. + * + * Args: + * binNum: bin number + * + * Return: + * The end of the interval, this value is not included in the interval + */ +static double binEnd(const unsigned int binNum) +{ + g_assert_cmpuint(binNum, <, BIN_NB); + + if (binNum == 0) + { + return 0.; + } + else if (binNum < BIN_NB - 1) + { + return pow(binBase, (double) binNum - BIN_NB + 2); + } + else + { + return INFINITY; + } +} + + +/* + * Return the total number of elements in the "normal" bins (not underflow or + * overflow) + * + * Args: + * bins: the structure containing bins to build a histrogram + */ +static uint32_t normalTotal(struct Bins* const bins) +{ + return bins->total - bins->bin[0] - bins->bin[BIN_NB - 1]; +} + + +/* Update the bounds between two traces + * + * Args: + * bounds: the array containing all the trace-pair bounds + * e1, e2: the two related events + */ +static void updateBounds(Bounds** const bounds, Event* const e1, Event* const + e2) +{ + unsigned int traceI, traceJ; + uint64_t messageTime; + Bounds* tpBounds; + + if (e1->traceNum < e2->traceNum) + { + traceI= e2->traceNum; + traceJ= e1->traceNum; + messageTime= e1->cpuTime; + } + else + { + traceI= e1->traceNum; + traceJ= e2->traceNum; + messageTime= e2->cpuTime; + } + tpBounds= &bounds[traceI][traceJ]; + + if (messageTime < tpBounds->min) + { + tpBounds->min= messageTime; + } + if (messageTime > tpBounds->max) + { + tpBounds->max= messageTime; + } +} + + +/* + * Write the analysis-specific graph lines in the gnuplot script. + * + * Args: + * syncState: container for synchronization data + * i: first trace number + * j: second trace number, garanteed to be larger than i + */ +static void writeAnalysisTraceTimeBackPlotsEval(SyncState* const syncState, + const unsigned int i, const unsigned int j) +{ + SyncState* chullSS= ((AnalysisDataEval*) + syncState->analysisData)->graphs->chullSS; + const GraphFunctions* graphFunctions= + &chullSS->analysisModule->graphFunctions; + + if (graphFunctions->writeTraceTimeBackPlots != NULL) + { + graphFunctions->writeTraceTimeBackPlots(chullSS, i, j); + } +} + + +/* + * Write the analysis-specific graph lines in the gnuplot script. + * + * Args: + * syncState: container for synchronization data + * i: first trace number + * j: second trace number, garanteed to be larger than i + */ +static void writeAnalysisTraceTimeForePlotsEval(SyncState* const syncState, + const unsigned int i, const unsigned int j) +{ + SyncState* chullSS= ((AnalysisDataEval*) + syncState->analysisData)->graphs->chullSS; + const GraphFunctions* graphFunctions= + &chullSS->analysisModule->graphFunctions; + + if (graphFunctions->writeTraceTimeForePlots != NULL) + { + graphFunctions->writeTraceTimeForePlots(chullSS, i, j); + } +}