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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "trace_reader.h"
#include "parse_options.h"
const int kMillion = 1000000;
const int kMHz = 200 * kMillion;
struct symbol {
int count; // number of times a function is executed
uint64_t elapsed; // elapsed time for this function
};
typedef TraceReader<symbol> TraceReaderType;
#include "parse_options-inl.h"
static const uint32_t kOffsetThreshold = 0x100000;
// This comparison function is called from qsort() to sort
// symbols into decreasing elapsed time.
int cmp_sym_elapsed(const void *a, const void *b) {
const symbol_type *syma, *symb;
uint64_t elapsed1, elapsed2;
syma = static_cast<symbol_type const *>(a);
symb = static_cast<symbol_type const *>(b);
elapsed1 = syma->elapsed;
elapsed2 = symb->elapsed;
if (elapsed1 < elapsed2)
return 1;
if (elapsed1 == elapsed2)
return strcmp(syma->name, symb->name);
return -1;
}
void Usage(const char *program)
{
fprintf(stderr, "Usage: %s [options] trace_file elf_file\n", program);
OptionsUsage();
}
int main(int argc, char **argv)
{
ParseOptions(argc, argv);
if (argc - optind != 2) {
Usage(argv[0]);
exit(1);
}
char *trace_filename = argv[optind++];
char *elf_file = argv[optind++];
TraceReader<symbol> *trace = new TraceReader<symbol>;
trace->Open(trace_filename);
trace->SetDemangle(demangle);
trace->ReadKernelSymbols(elf_file);
trace->SetRoot(root);
symbol_type dummy;
dummy.count = 0;
dummy.elapsed = 0;
symbol_type *prev_sym = &dummy;
uint64_t prev_bb_time = 0;
while (1) {
symbol_type *sym;
BBEvent event;
BBEvent first_ignored_event;
bool eof = GetNextValidEvent(trace, &event, &first_ignored_event, &sym);
// Assign the elapsed time to the previous function symbol
uint64_t elapsed = 0;
if (first_ignored_event.time != 0)
elapsed = first_ignored_event.time - prev_bb_time;
else if (!eof)
elapsed = event.time - prev_bb_time;
prev_sym->elapsed += elapsed;
if (eof)
break;
prev_bb_time = event.time;
sym->count += 1;
prev_sym = sym;
#if 0
printf("t%lld bb_num: %d, bb_addr: 0x%x func: %s, addr: 0x%x, count: %d\n",
bb_time, bb_num, bb_addr, sym->name, sym->addr, sym->count);
#endif
}
int nsyms;
symbol_type *syms = trace->GetSymbols(&nsyms);
// Sort the symbols into decreasing order of elapsed time
qsort(syms, nsyms, sizeof(symbol_type), cmp_sym_elapsed);
// Add up all the cycles
uint64_t total = 0;
symbol_type *sym = syms;
for (int ii = 0; ii < nsyms; ++ii, ++sym) {
total += sym->elapsed;
}
double secs = 1.0 * total / kMHz;
printf("Total seconds: %.2f, total cycles: %lld, MHz: %d\n\n",
secs, total, kMHz / kMillion);
uint64_t sum = 0;
printf("Elapsed secs Elapsed cyc %% %% Function\n");
sym = syms;
for (int ii = 0; ii < nsyms; ++ii, ++sym) {
if (sym->elapsed == 0)
break;
sum += sym->elapsed;
double per = 100.0 * sym->elapsed / total;
double sum_per = 100.0 * sum / total;
double secs = 1.0 * sym->elapsed / kMHz;
char *ksym = " ";
if (sym->region->flags & region_type::kIsKernelRegion)
ksym = "k";
printf("%12.2f %11lld %6.2f %6.2f %s %s\n",
secs, sym->elapsed, per, sum_per, ksym, sym->name);
}
delete[] syms;
delete trace;
return 0;
}
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