/* ----------------------------------------------------------------------------- * * (c) The GHC Team, 1998-2000 * * Support for profiling * * ---------------------------------------------------------------------------*/ #ifdef PROFILING #include "PosixSource.h" #include "Rts.h" #include "RtsUtils.h" #include "Profiling.h" #include "Proftimer.h" #include "ProfHeap.h" #include "Arena.h" #include "RetainerProfile.h" #include "Printer.h" #include "Capability.h" #include #ifdef DEBUG #include "Trace.h" #endif /* * Profiling allocation arena. */ Arena *prof_arena; /* * Global variables used to assign unique IDs to cc's, ccs's, and * closure_cats */ unsigned int CC_ID = 1; unsigned int CCS_ID = 1; /* figures for the profiling report. */ static StgWord64 total_alloc; static W_ total_prof_ticks; /* Globals for opening the profiling log file(s) */ static char *prof_filename; /* prof report file name = .prof */ FILE *prof_file; static char *hp_filename; /* heap profile (hp2ps style) log file */ FILE *hp_file; /* Linked lists to keep track of CCs and CCSs that haven't * been declared in the log file yet */ CostCentre *CC_LIST = NULL; CostCentreStack *CCS_LIST = NULL; #ifdef THREADED_RTS Mutex ccs_mutex; #endif /* * Built-in cost centres and cost-centre stacks: * * MAIN is the root of the cost-centre stack tree. If there are * no {-# SCC #-}s in the program, all costs will be attributed * to MAIN. * * SYSTEM is the RTS in general (scheduler, etc.). All costs for * RTS operations apart from garbage collection are attributed * to SYSTEM. * * GC is the storage manager / garbage collector. * * OVERHEAD gets all costs generated by the profiling system * itself. These are costs that would not be incurred * during non-profiled execution of the program. * * DONT_CARE is a placeholder cost-centre we assign to static * constructors. It should *never* accumulate any costs. * * PINNED accumulates memory allocated to pinned objects, which * cannot be profiled separately because we cannot reliably * traverse pinned memory. */ CC_DECLARE(CC_MAIN, "MAIN", "MAIN", "", CC_NOT_CAF, ); CC_DECLARE(CC_SYSTEM, "SYSTEM", "SYSTEM", "", CC_NOT_CAF, ); CC_DECLARE(CC_GC, "GC", "GC", "", CC_NOT_CAF, ); CC_DECLARE(CC_OVERHEAD, "OVERHEAD_of", "PROFILING", "", CC_NOT_CAF, ); CC_DECLARE(CC_DONT_CARE, "DONT_CARE", "MAIN", "", CC_NOT_CAF, ); CC_DECLARE(CC_PINNED, "PINNED", "SYSTEM", "", CC_NOT_CAF, ); CC_DECLARE(CC_IDLE, "IDLE", "IDLE", "", CC_NOT_CAF, ); CCS_DECLARE(CCS_MAIN, CC_MAIN, ); CCS_DECLARE(CCS_SYSTEM, CC_SYSTEM, ); CCS_DECLARE(CCS_GC, CC_GC, ); CCS_DECLARE(CCS_OVERHEAD, CC_OVERHEAD, ); CCS_DECLARE(CCS_DONT_CARE, CC_DONT_CARE, ); CCS_DECLARE(CCS_PINNED, CC_PINNED, ); CCS_DECLARE(CCS_IDLE, CC_IDLE, ); /* * Static Functions */ static CostCentreStack * appendCCS ( CostCentreStack *ccs1, CostCentreStack *ccs2 ); static CostCentreStack * actualPush_ ( CostCentreStack *ccs, CostCentre *cc, CostCentreStack *new_ccs ); static rtsBool ignoreCCS ( CostCentreStack *ccs ); static void countTickss ( CostCentreStack *ccs ); static void inheritCosts ( CostCentreStack *ccs ); static nat numDigits ( StgInt i ); static void findCCSMaxLens ( CostCentreStack *ccs, nat indent, nat *max_label_len, nat *max_module_len, nat *max_id_len ); static void logCCS ( CostCentreStack *ccs, nat indent, nat max_label_len, nat max_module_len, nat max_id_len ); static void reportCCS ( CostCentreStack *ccs ); static CostCentreStack * checkLoop ( CostCentreStack *ccs, CostCentre *cc ); static CostCentreStack * pruneCCSTree ( CostCentreStack *ccs ); static CostCentreStack * actualPush ( CostCentreStack *, CostCentre * ); static CostCentreStack * isInIndexTable ( IndexTable *, CostCentre * ); static IndexTable * addToIndexTable ( IndexTable *, CostCentreStack *, CostCentre *, unsigned int ); static void ccsSetSelected ( CostCentreStack *ccs ); static void initTimeProfiling ( void ); static void initProfilingLogFile ( void ); /* ----------------------------------------------------------------------------- Initialise the profiling environment -------------------------------------------------------------------------- */ void initProfiling1 (void) { // initialise our arena prof_arena = newArena(); /* for the benefit of allocate()... */ { nat n; for (n=0; n < n_capabilities; n++) { capabilities[n]->r.rCCCS = CCS_SYSTEM; } } #ifdef THREADED_RTS initMutex(&ccs_mutex); #endif } void freeProfiling (void) { arenaFree(prof_arena); } void initProfiling2 (void) { CostCentreStack *ccs, *next; /* Set up the log file, and dump the header and cost centre * information into it. */ initProfilingLogFile(); /* Register all the cost centres / stacks in the program * CC_MAIN gets link = 0, all others have non-zero link. */ REGISTER_CC(CC_MAIN); REGISTER_CC(CC_SYSTEM); REGISTER_CC(CC_GC); REGISTER_CC(CC_OVERHEAD); REGISTER_CC(CC_DONT_CARE); REGISTER_CC(CC_PINNED); REGISTER_CC(CC_IDLE); REGISTER_CCS(CCS_SYSTEM); REGISTER_CCS(CCS_GC); REGISTER_CCS(CCS_OVERHEAD); REGISTER_CCS(CCS_DONT_CARE); REGISTER_CCS(CCS_PINNED); REGISTER_CCS(CCS_IDLE); REGISTER_CCS(CCS_MAIN); /* find all the registered cost centre stacks, and make them * children of CCS_MAIN. */ ASSERT(CCS_LIST == CCS_MAIN); CCS_LIST = CCS_LIST->prevStack; CCS_MAIN->prevStack = NULL; CCS_MAIN->root = CCS_MAIN; ccsSetSelected(CCS_MAIN); // make CCS_MAIN the parent of all the pre-defined CCSs. for (ccs = CCS_LIST; ccs != NULL; ) { next = ccs->prevStack; ccs->prevStack = NULL; actualPush_(CCS_MAIN,ccs->cc,ccs); ccs->root = ccs; ccs = next; } if (RtsFlags.CcFlags.doCostCentres) { initTimeProfiling(); } if (RtsFlags.ProfFlags.doHeapProfile) { initHeapProfiling(); } } static void initProfilingLogFile(void) { char *prog; prog = arenaAlloc(prof_arena, strlen(prog_name) + 1); strcpy(prog, prog_name); #ifdef mingw32_HOST_OS // on Windows, drop the .exe suffix if there is one { char *suff; suff = strrchr(prog,'.'); if (suff != NULL && !strcmp(suff,".exe")) { *suff = '\0'; } } #endif if (RtsFlags.CcFlags.doCostCentres == 0 && RtsFlags.ProfFlags.doHeapProfile != HEAP_BY_RETAINER && RtsFlags.ProfFlags.retainerSelector == NULL) { /* No need for the .prof file */ prof_filename = NULL; prof_file = NULL; } else { /* Initialise the log file name */ prof_filename = arenaAlloc(prof_arena, strlen(prog) + 6); sprintf(prof_filename, "%s.prof", prog); /* open the log file */ if ((prof_file = fopen(prof_filename, "w")) == NULL) { debugBelch("Can't open profiling report file %s\n", prof_filename); RtsFlags.CcFlags.doCostCentres = 0; // The following line was added by Sung; retainer/LDV profiling may need // two output files, i.e., .prof/hp. if (RtsFlags.ProfFlags.doHeapProfile == HEAP_BY_RETAINER) RtsFlags.ProfFlags.doHeapProfile = 0; return; } } if (RtsFlags.ProfFlags.doHeapProfile) { /* Initialise the log file name */ hp_filename = arenaAlloc(prof_arena, strlen(prog) + 6); sprintf(hp_filename, "%s.hp", prog); /* open the log file */ if ((hp_file = fopen(hp_filename, "w")) == NULL) { debugBelch("Can't open profiling report file %s\n", hp_filename); RtsFlags.ProfFlags.doHeapProfile = 0; return; } } } void initTimeProfiling(void) { /* Start ticking */ startProfTimer(); }; void endProfiling ( void ) { if (RtsFlags.CcFlags.doCostCentres) { stopProfTimer(); } if (RtsFlags.ProfFlags.doHeapProfile) { endHeapProfiling(); } } /* ----------------------------------------------------------------------------- Set CCCS when entering a function. The algorithm is as follows. ccs ++> ccsfn = ccs ++ dropCommonPrefix ccs ccsfn where dropCommonPrefix A B -- returns the suffix of B after removing any prefix common -- to both A and B. e.g. ++> <> = ++> = ++> = ++> = ++> = -------------------------------------------------------------------------- */ // implements c1 ++> c2, where c1 and c2 are equal depth // static CostCentreStack * enterFunEqualStacks (CostCentreStack *ccs0, CostCentreStack *ccsapp, CostCentreStack *ccsfn) { ASSERT(ccsapp->depth == ccsfn->depth); if (ccsapp == ccsfn) return ccs0; return pushCostCentre(enterFunEqualStacks(ccs0, ccsapp->prevStack, ccsfn->prevStack), ccsfn->cc); } // implements c1 ++> c2, where c2 is deeper than c1. // Drop elements of c2 until we have equal stacks, call // enterFunEqualStacks(), and then push on the elements that we // dropped in reverse order. // static CostCentreStack * enterFunCurShorter (CostCentreStack *ccsapp, CostCentreStack *ccsfn, StgWord n) { if (n == 0) { ASSERT(ccsfn->depth == ccsapp->depth); return enterFunEqualStacks(ccsapp,ccsapp,ccsfn);; } else { ASSERT(ccsfn->depth > ccsapp->depth); return pushCostCentre(enterFunCurShorter(ccsapp, ccsfn->prevStack, n-1), ccsfn->cc); } } void enterFunCCS (StgRegTable *reg, CostCentreStack *ccsfn) { CostCentreStack *ccsapp; // common case 1: both stacks are the same if (ccsfn == reg->rCCCS) { return; } // common case 2: the function stack is empty, or just CAF if (ccsfn->prevStack == CCS_MAIN) { return; } ccsapp = reg->rCCCS; reg->rCCCS = CCS_OVERHEAD; // common case 3: the stacks are completely different (e.g. one is a // descendent of MAIN and the other of a CAF): we append the whole // of the function stack to the current CCS. if (ccsfn->root != ccsapp->root) { reg->rCCCS = appendCCS(ccsapp,ccsfn); return; } // uncommon case 4: ccsapp is deeper than ccsfn if (ccsapp->depth > ccsfn->depth) { nat i, n; CostCentreStack *tmp = ccsapp; n = ccsapp->depth - ccsfn->depth; for (i = 0; i < n; i++) { tmp = tmp->prevStack; } reg->rCCCS = enterFunEqualStacks(ccsapp,tmp,ccsfn); return; } // uncommon case 5: ccsfn is deeper than CCCS if (ccsfn->depth > ccsapp->depth) { reg->rCCCS = enterFunCurShorter(ccsapp, ccsfn, ccsfn->depth - ccsapp->depth); return; } // uncommon case 6: stacks are equal depth, but different reg->rCCCS = enterFunEqualStacks(ccsapp,ccsapp,ccsfn); } /* ----------------------------------------------------------------------------- Decide whether closures with this CCS should contribute to the heap profile. -------------------------------------------------------------------------- */ static void ccsSetSelected (CostCentreStack *ccs) { if (RtsFlags.ProfFlags.modSelector) { if (! strMatchesSelector (ccs->cc->module, RtsFlags.ProfFlags.modSelector) ) { ccs->selected = 0; return; } } if (RtsFlags.ProfFlags.ccSelector) { if (! strMatchesSelector (ccs->cc->label, RtsFlags.ProfFlags.ccSelector) ) { ccs->selected = 0; return; } } if (RtsFlags.ProfFlags.ccsSelector) { CostCentreStack *c; for (c = ccs; c != NULL; c = c->prevStack) { if ( strMatchesSelector (c->cc->label, RtsFlags.ProfFlags.ccsSelector) ) { break; } } if (c == NULL) { ccs->selected = 0; return; } } ccs->selected = 1; return; } /* ----------------------------------------------------------------------------- Cost-centre stack manipulation -------------------------------------------------------------------------- */ #ifdef DEBUG CostCentreStack * _pushCostCentre ( CostCentreStack *ccs, CostCentre *cc ); CostCentreStack * pushCostCentre ( CostCentreStack *ccs, CostCentre *cc ) #define pushCostCentre _pushCostCentre { IF_DEBUG(prof, traceBegin("pushing %s on ", cc->label); debugCCS(ccs); traceEnd();); return pushCostCentre(ccs,cc); } #endif /* Append ccs1 to ccs2 (ignoring any CAF cost centre at the root of ccs1 */ #ifdef DEBUG CostCentreStack *_appendCCS ( CostCentreStack *ccs1, CostCentreStack *ccs2 ); CostCentreStack * appendCCS ( CostCentreStack *ccs1, CostCentreStack *ccs2 ) #define appendCCS _appendCCS { IF_DEBUG(prof, if (ccs1 != ccs2) { debugBelch("Appending "); debugCCS(ccs1); debugBelch(" to "); debugCCS(ccs2); debugBelch("\n");}); return appendCCS(ccs1,ccs2); } #endif CostCentreStack * appendCCS ( CostCentreStack *ccs1, CostCentreStack *ccs2 ) { if (ccs1 == ccs2) { return ccs1; } if (ccs2 == CCS_MAIN || ccs2->cc->is_caf == CC_IS_CAF) { // stop at a CAF element return ccs1; } return pushCostCentre(appendCCS(ccs1, ccs2->prevStack), ccs2->cc); } // Pick one: // #define RECURSION_DROPS #define RECURSION_TRUNCATES CostCentreStack * pushCostCentre (CostCentreStack *ccs, CostCentre *cc) { CostCentreStack *temp_ccs, *ret; IndexTable *ixtable; if (ccs == EMPTY_STACK) { ACQUIRE_LOCK(&ccs_mutex); ret = actualPush(ccs,cc); } else { if (ccs->cc == cc) { return ccs; } else { // check if we've already memoized this stack ixtable = ccs->indexTable; temp_ccs = isInIndexTable(ixtable,cc); if (temp_ccs != EMPTY_STACK) { return temp_ccs; } else { // not in the IndexTable, now we take the lock: ACQUIRE_LOCK(&ccs_mutex); if (ccs->indexTable != ixtable) { // someone modified ccs->indexTable while // we did not hold the lock, so we must // check it again: temp_ccs = isInIndexTable(ixtable,cc); if (temp_ccs != EMPTY_STACK) { RELEASE_LOCK(&ccs_mutex); return temp_ccs; } } temp_ccs = checkLoop(ccs,cc); if (temp_ccs != NULL) { // This CC is already in the stack somewhere. // This could be recursion, or just calling // another function with the same CC. // A number of policies are possible at this // point, we implement two here: // - truncate the stack to the previous instance // of this CC // - ignore this push, return the same stack. // CostCentreStack *new_ccs; #if defined(RECURSION_TRUNCATES) new_ccs = temp_ccs; #else // defined(RECURSION_DROPS) new_ccs = ccs; #endif ccs->indexTable = addToIndexTable (ccs->indexTable, new_ccs, cc, 1); ret = new_ccs; } else { ret = actualPush (ccs,cc); } } } } RELEASE_LOCK(&ccs_mutex); return ret; } static CostCentreStack * checkLoop (CostCentreStack *ccs, CostCentre *cc) { while (ccs != EMPTY_STACK) { if (ccs->cc == cc) return ccs; ccs = ccs->prevStack; } return NULL; } static CostCentreStack * actualPush (CostCentreStack *ccs, CostCentre *cc) { CostCentreStack *new_ccs; // allocate space for a new CostCentreStack new_ccs = (CostCentreStack *) arenaAlloc(prof_arena, sizeof(CostCentreStack)); return actualPush_(ccs, cc, new_ccs); } static CostCentreStack * actualPush_ (CostCentreStack *ccs, CostCentre *cc, CostCentreStack *new_ccs) { /* assign values to each member of the structure */ new_ccs->ccsID = CCS_ID++; new_ccs->cc = cc; new_ccs->prevStack = ccs; new_ccs->root = ccs->root; new_ccs->depth = ccs->depth + 1; new_ccs->indexTable = EMPTY_TABLE; /* Initialise the various _scc_ counters to zero */ new_ccs->scc_count = 0; /* Initialize all other stats here. There should be a quick way * that's easily used elsewhere too */ new_ccs->time_ticks = 0; new_ccs->mem_alloc = 0; new_ccs->inherited_ticks = 0; new_ccs->inherited_alloc = 0; // Set the selected field. ccsSetSelected(new_ccs); /* update the memoization table for the parent stack */ ccs->indexTable = addToIndexTable(ccs->indexTable, new_ccs, cc, 0/*not a back edge*/); /* return a pointer to the new stack */ return new_ccs; } static CostCentreStack * isInIndexTable(IndexTable *it, CostCentre *cc) { while (it!=EMPTY_TABLE) { if (it->cc == cc) return it->ccs; else it = it->next; } /* otherwise we never found it so return EMPTY_TABLE */ return EMPTY_TABLE; } static IndexTable * addToIndexTable (IndexTable *it, CostCentreStack *new_ccs, CostCentre *cc, unsigned int back_edge) { IndexTable *new_it; new_it = arenaAlloc(prof_arena, sizeof(IndexTable)); new_it->cc = cc; new_it->ccs = new_ccs; new_it->next = it; new_it->back_edge = back_edge; return new_it; } /* ----------------------------------------------------------------------------- Generating a time & allocation profiling report. -------------------------------------------------------------------------- */ /* We omit certain system-related CCs and CCSs from the default * reports, so as not to cause confusion. */ static rtsBool ignoreCC (CostCentre *cc) { if (RtsFlags.CcFlags.doCostCentres < COST_CENTRES_ALL && ( cc == CC_OVERHEAD || cc == CC_DONT_CARE || cc == CC_GC || cc == CC_SYSTEM || cc == CC_IDLE)) { return rtsTrue; } else { return rtsFalse; } } static rtsBool ignoreCCS (CostCentreStack *ccs) { if (RtsFlags.CcFlags.doCostCentres < COST_CENTRES_ALL && ( ccs == CCS_OVERHEAD || ccs == CCS_DONT_CARE || ccs == CCS_GC || ccs == CCS_SYSTEM || ccs == CCS_IDLE)) { return rtsTrue; } else { return rtsFalse; } } /* ----------------------------------------------------------------------------- Generating the aggregated per-cost-centre time/alloc report. -------------------------------------------------------------------------- */ static CostCentre *sorted_cc_list; static void aggregateCCCosts( CostCentreStack *ccs ) { IndexTable *i; ccs->cc->mem_alloc += ccs->mem_alloc; ccs->cc->time_ticks += ccs->time_ticks; for (i = ccs->indexTable; i != 0; i = i->next) { if (!i->back_edge) { aggregateCCCosts(i->ccs); } } } static void insertCCInSortedList( CostCentre *new_cc ) { CostCentre **prev, *cc; prev = &sorted_cc_list; for (cc = sorted_cc_list; cc != NULL; cc = cc->link) { if (new_cc->time_ticks > cc->time_ticks) { new_cc->link = cc; *prev = new_cc; return; } else { prev = &(cc->link); } } new_cc->link = NULL; *prev = new_cc; } static nat strlen_utf8 (char *s) { nat n = 0; unsigned char c; for (; *s != '\0'; s++) { c = *s; if (c < 0x80 || c > 0xBF) n++; } return n; } static void reportPerCCCosts( void ) { CostCentre *cc, *next; nat max_label_len, max_module_len; aggregateCCCosts(CCS_MAIN); sorted_cc_list = NULL; max_label_len = 11; // no shorter than the "COST CENTRE" header max_module_len = 6; // no shorter than the "MODULE" header for (cc = CC_LIST; cc != NULL; cc = next) { next = cc->link; if (cc->time_ticks > total_prof_ticks/100 || cc->mem_alloc > total_alloc/100 || RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_ALL) { insertCCInSortedList(cc); max_label_len = stg_max(strlen_utf8(cc->label), max_label_len); max_module_len = stg_max(strlen_utf8(cc->module), max_module_len); } } fprintf(prof_file, "%-*s %-*s", max_label_len, "COST CENTRE", max_module_len, "MODULE"); fprintf(prof_file, " %6s %6s", "%time", "%alloc"); if (RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_VERBOSE) { fprintf(prof_file, " %5s %9s", "ticks", "bytes"); } fprintf(prof_file, "\n\n"); for (cc = sorted_cc_list; cc != NULL; cc = cc->link) { if (ignoreCC(cc)) { continue; } fprintf(prof_file, "%s%*s %s%*s", cc->label, max_label_len - strlen_utf8(cc->label), "", cc->module, max_module_len - strlen_utf8(cc->module), ""); fprintf(prof_file, " %6.1f %6.1f", total_prof_ticks == 0 ? 0.0 : (cc->time_ticks / (StgFloat) total_prof_ticks * 100), total_alloc == 0 ? 0.0 : (cc->mem_alloc / (StgFloat) total_alloc * 100) ); if (RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_VERBOSE) { fprintf(prof_file, " %5" FMT_Word64 " %9" FMT_Word64, (StgWord64)(cc->time_ticks), cc->mem_alloc*sizeof(W_)); } fprintf(prof_file, "\n"); } fprintf(prof_file,"\n\n"); } /* ----------------------------------------------------------------------------- Generate the cost-centre-stack time/alloc report -------------------------------------------------------------------------- */ static void fprintHeader( nat max_label_len, nat max_module_len, nat max_id_len ) { fprintf(prof_file, "%-*s %-*s %-*s %11s %12s %12s\n", max_label_len, "", max_module_len, "", max_id_len, "", "", "individual", "inherited"); fprintf(prof_file, "%-*s %-*s %-*s", max_label_len, "COST CENTRE", max_module_len, "MODULE", max_id_len, "no."); fprintf(prof_file, " %11s %5s %6s %5s %6s", "entries", "%time", "%alloc", "%time", "%alloc"); if (RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_VERBOSE) { fprintf(prof_file, " %5s %9s", "ticks", "bytes"); } fprintf(prof_file, "\n\n"); } void reportCCSProfiling( void ) { nat count; char temp[128]; /* sigh: magic constant */ stopProfTimer(); total_prof_ticks = 0; total_alloc = 0; countTickss(CCS_MAIN); if (RtsFlags.CcFlags.doCostCentres == 0) return; fprintf(prof_file, "\t%s Time and Allocation Profiling Report (%s)\n", time_str(), "Final"); fprintf(prof_file, "\n\t "); fprintf(prof_file, " %s", prog_name); fprintf(prof_file, " +RTS"); for (count = 0; rts_argv[count]; count++) fprintf(prof_file, " %s", rts_argv[count]); fprintf(prof_file, " -RTS"); for (count = 1; prog_argv[count]; count++) fprintf(prof_file, " %s", prog_argv[count]); fprintf(prof_file, "\n\n"); fprintf(prof_file, "\ttotal time = %11.2f secs (%lu ticks @ %d us, %d processor%s)\n", ((double) total_prof_ticks * (double) RtsFlags.MiscFlags.tickInterval) / (TIME_RESOLUTION * n_capabilities), (unsigned long) total_prof_ticks, (int) TimeToUS(RtsFlags.MiscFlags.tickInterval), n_capabilities, n_capabilities > 1 ? "s" : ""); fprintf(prof_file, "\ttotal alloc = %11s bytes", showStgWord64(total_alloc * sizeof(W_), temp, rtsTrue/*commas*/)); fprintf(prof_file, " (excludes profiling overheads)\n\n"); reportPerCCCosts(); inheritCosts(CCS_MAIN); reportCCS(pruneCCSTree(CCS_MAIN)); } static nat numDigits(StgInt i) { nat result; result = 1; if (i < 0) i = 0; while (i > 9) { i /= 10; result++; } return result; } static void findCCSMaxLens(CostCentreStack *ccs, nat indent, nat *max_label_len, nat *max_module_len, nat *max_id_len) { CostCentre *cc; IndexTable *i; cc = ccs->cc; *max_label_len = stg_max(*max_label_len, indent + strlen_utf8(cc->label)); *max_module_len = stg_max(*max_module_len, strlen_utf8(cc->module)); *max_id_len = stg_max(*max_id_len, numDigits(ccs->ccsID)); for (i = ccs->indexTable; i != 0; i = i->next) { if (!i->back_edge) { findCCSMaxLens(i->ccs, indent+1, max_label_len, max_module_len, max_id_len); } } } static void logCCS(CostCentreStack *ccs, nat indent, nat max_label_len, nat max_module_len, nat max_id_len) { CostCentre *cc; IndexTable *i; cc = ccs->cc; /* Only print cost centres with non 0 data ! */ if (!ignoreCCS(ccs)) /* force printing of *all* cost centres if -Pa */ { fprintf(prof_file, "%-*s%s%*s %s%*s", indent, "", cc->label, max_label_len-indent - strlen_utf8(cc->label), "", cc->module, max_module_len - strlen_utf8(cc->module), ""); fprintf(prof_file, " %*ld %11" FMT_Word64 " %5.1f %5.1f %5.1f %5.1f", max_id_len, ccs->ccsID, ccs->scc_count, total_prof_ticks == 0 ? 0.0 : ((double)ccs->time_ticks / (double)total_prof_ticks * 100.0), total_alloc == 0 ? 0.0 : ((double)ccs->mem_alloc / (double)total_alloc * 100.0), total_prof_ticks == 0 ? 0.0 : ((double)ccs->inherited_ticks / (double)total_prof_ticks * 100.0), total_alloc == 0 ? 0.0 : ((double)ccs->inherited_alloc / (double)total_alloc * 100.0) ); if (RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_VERBOSE) { fprintf(prof_file, " %5" FMT_Word64 " %9" FMT_Word64, (StgWord64)(ccs->time_ticks), ccs->mem_alloc*sizeof(W_)); } fprintf(prof_file, "\n"); } for (i = ccs->indexTable; i != 0; i = i->next) { if (!i->back_edge) { logCCS(i->ccs, indent+1, max_label_len, max_module_len, max_id_len); } } } static void reportCCS(CostCentreStack *ccs) { nat max_label_len, max_module_len, max_id_len; max_label_len = 11; // no shorter than "COST CENTRE" header max_module_len = 6; // no shorter than "MODULE" header max_id_len = 3; // no shorter than "no." header findCCSMaxLens(ccs, 0, &max_label_len, &max_module_len, &max_id_len); fprintHeader(max_label_len, max_module_len, max_id_len); logCCS(ccs, 0, max_label_len, max_module_len, max_id_len); } /* Traverse the cost centre stack tree and accumulate * ticks/allocations. */ static void countTickss(CostCentreStack *ccs) { IndexTable *i; if (!ignoreCCS(ccs)) { total_alloc += ccs->mem_alloc; total_prof_ticks += ccs->time_ticks; } for (i = ccs->indexTable; i != NULL; i = i->next) if (!i->back_edge) { countTickss(i->ccs); } } /* Traverse the cost centre stack tree and inherit ticks & allocs. */ static void inheritCosts(CostCentreStack *ccs) { IndexTable *i; if (ignoreCCS(ccs)) { return; } ccs->inherited_ticks += ccs->time_ticks; ccs->inherited_alloc += ccs->mem_alloc; for (i = ccs->indexTable; i != NULL; i = i->next) if (!i->back_edge) { inheritCosts(i->ccs); ccs->inherited_ticks += i->ccs->inherited_ticks; ccs->inherited_alloc += i->ccs->inherited_alloc; } return; } // // Prune CCSs with zero entries, zero ticks or zero allocation from // the tree, unless COST_CENTRES_ALL is on. // static CostCentreStack * pruneCCSTree (CostCentreStack *ccs) { CostCentreStack *ccs1; IndexTable *i, **prev; prev = &ccs->indexTable; for (i = ccs->indexTable; i != 0; i = i->next) { if (i->back_edge) { continue; } ccs1 = pruneCCSTree(i->ccs); if (ccs1 == NULL) { *prev = i->next; } else { prev = &(i->next); } } if ( (RtsFlags.CcFlags.doCostCentres >= COST_CENTRES_ALL /* force printing of *all* cost centres if -P -P */ ) || ( ccs->indexTable != 0 ) || ( ccs->scc_count || ccs->time_ticks || ccs->mem_alloc ) ) { return ccs; } else { return NULL; } } void fprintCCS( FILE *f, CostCentreStack *ccs ) { fprintf(f,"<"); for (; ccs && ccs != CCS_MAIN; ccs = ccs->prevStack ) { fprintf(f,"%s.%s", ccs->cc->module, ccs->cc->label); if (ccs->prevStack && ccs->prevStack != CCS_MAIN) { fprintf(f,","); } } fprintf(f,">"); } // Returns: True if the call stack ended with CAF static rtsBool fprintCallStack (CostCentreStack *ccs) { CostCentreStack *prev; fprintf(stderr,"%s.%s", ccs->cc->module, ccs->cc->label); prev = ccs->prevStack; while (prev && prev != CCS_MAIN) { ccs = prev; fprintf(stderr, ",\n called from %s.%s", ccs->cc->module, ccs->cc->label); prev = ccs->prevStack; } fprintf(stderr, "\n"); return (!strncmp(ccs->cc->label, "CAF", 3)); } /* For calling from .cmm code, where we can't reliably refer to stderr */ void fprintCCS_stderr (CostCentreStack *ccs, StgClosure *exception, StgTSO *tso) { rtsBool is_caf; StgPtr frame; StgStack *stack; CostCentreStack *prev_ccs; nat depth = 0; const nat MAX_DEPTH = 10; // don't print gigantic chains of stacks { char *desc; StgInfoTable *info; info = get_itbl(UNTAG_CLOSURE(exception)); switch (info->type) { case CONSTR: case CONSTR_1_0: case CONSTR_0_1: case CONSTR_2_0: case CONSTR_1_1: case CONSTR_0_2: case CONSTR_STATIC: case CONSTR_NOCAF_STATIC: desc = GET_CON_DESC(itbl_to_con_itbl(info)); break; default: desc = closure_type_names[info->type]; break; } fprintf(stderr, "*** Exception (reporting due to +RTS -xc): (%s), stack trace: \n ", desc); } is_caf = fprintCallStack(ccs); // traverse the stack down to the enclosing update frame to // find out where this CCS was evaluated from... stack = tso->stackobj; frame = stack->sp; prev_ccs = ccs; for (; is_caf && depth < MAX_DEPTH; depth++) { switch (get_itbl((StgClosure*)frame)->type) { case UPDATE_FRAME: ccs = ((StgUpdateFrame*)frame)->header.prof.ccs; frame += sizeofW(StgUpdateFrame); if (ccs == CCS_MAIN) { goto done; } if (ccs == prev_ccs) { // ignore if this is the same as the previous stack, // we're probably in library code and haven't // accumulated any more interesting stack items // since the last update frame. break; } prev_ccs = ccs; fprintf(stderr, " --> evaluated by: "); is_caf = fprintCallStack(ccs); break; case UNDERFLOW_FRAME: stack = ((StgUnderflowFrame*)frame)->next_chunk; frame = stack->sp; break; case STOP_FRAME: goto done; default: frame += stack_frame_sizeW((StgClosure*)frame); break; } } done: return; } #ifdef DEBUG void debugCCS( CostCentreStack *ccs ) { debugBelch("<"); for (; ccs && ccs != CCS_MAIN; ccs = ccs->prevStack ) { debugBelch("%s.%s", ccs->cc->module, ccs->cc->label); if (ccs->prevStack && ccs->prevStack != CCS_MAIN) { debugBelch(","); } } debugBelch(">"); } #endif /* DEBUG */ #endif /* PROFILING */