mirrored from https://gitlab.haskell.org/ghc/ghc.git
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Profiling.c
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Profiling.c
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/* -----------------------------------------------------------------------------
*
* (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 <string.h>
#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 = <program>.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", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_SYSTEM, "SYSTEM", "SYSTEM", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_GC, "GC", "GC", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_OVERHEAD, "OVERHEAD_of", "PROFILING", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_DONT_CARE, "DONT_CARE", "MAIN", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_PINNED, "PINNED", "SYSTEM", "<built-in>", CC_NOT_CAF, );
CC_DECLARE(CC_IDLE, "IDLE", "IDLE", "<built-in>", 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 void findCCSMaxLens ( CostCentreStack *ccs,
nat indent,
nat *max_label_len,
nat *max_module_len );
static void logCCS ( CostCentreStack *ccs,
nat indent,
nat max_label_len,
nat max_module_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 <prog>.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., <program>.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.
<a,b,c> ++> <> = <a,b,c>
<a,b,c> ++> <d> = <a,b,c,d>
<a,b,c> ++> <a,b> = <a,b,c>
<a,b> ++> <a,b,c> = <a,b,c>
<a,b,c> ++> <a,b,d> = <a,b,c,d>
-------------------------------------------------------------------------- */
// 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 */
if (ccs != EMPTY_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 = 7; // 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 )
{
fprintf(prof_file, "%-*s %-*s%6s %11s %11s %11s\n", max_label_len, "", max_module_len, "", "", "", "individual", "inherited");
fprintf(prof_file, "%-*s %-*s", max_label_len, "COST CENTRE", max_module_len, "MODULE");
fprintf(prof_file, "%6s %11s %5s %5s %5s %5s", "no.", "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 void
findCCSMaxLens(CostCentreStack *ccs, nat indent, nat *max_label_len, nat *max_module_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));
for (i = ccs->indexTable; i != 0; i = i->next) {
if (!i->back_edge) {
findCCSMaxLens(i->ccs, indent+1, max_label_len, max_module_len);
}
}
}
static void
logCCS(CostCentreStack *ccs, nat indent, nat max_label_len, nat max_module_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, "%6ld %11" FMT_Word64 " %5.1f %5.1f %5.1f %5.1f",
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);
}
}
}
static void
reportCCS(CostCentreStack *ccs)
{
nat max_label_len, max_module_len;
max_label_len = 11; // no shorter than "COST CENTRE" header
max_module_len = 7; // no shorter than "MODULE" header
findCCSMaxLens(ccs, 0, &max_label_len, &max_module_len);
fprintHeader(max_label_len, max_module_len);
logCCS(ccs, 0, max_label_len, max_module_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;