added stacktrace capturing benchmark
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c571ae2fc9
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5ac82ec5b9
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@ -143,3 +143,5 @@
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/test-driver
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/test-driver
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/thread_dealloc_unittest
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/thread_dealloc_unittest
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/thread_dealloc_unittest.exe
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/thread_dealloc_unittest.exe
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/unwind_bench
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/unwind_bench.exe
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@ -874,6 +874,12 @@ malloc_bench_shared_full_CXXFLAGS = $(PTHREAD_CFLAGS) $(AM_CXXFLAGS) $(NO_BUILTI
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malloc_bench_shared_full_LDFLAGS = $(PTHREAD_CFLAGS) $(TCMALLOC_FLAGS)
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malloc_bench_shared_full_LDFLAGS = $(PTHREAD_CFLAGS) $(TCMALLOC_FLAGS)
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malloc_bench_shared_full_LDADD = librun_benchmark.la libtcmalloc.la $(PTHREAD_LIBS)
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malloc_bench_shared_full_LDADD = librun_benchmark.la libtcmalloc.la $(PTHREAD_LIBS)
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noinst_PROGRAMS += unwind_bench
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unwind_bench_SOURCES = benchmark/unwind_bench.cc benchmark/getcontext_light.cc
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unwind_bench_CXXFLAGS = $(PTHREAD_CFLAGS) $(AM_CXXFLAGS) $(NO_BUILTIN_CXXFLAGS)
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unwind_bench_LDFLAGS = $(PTHREAD_CFLAGS) $(TCMALLOC_FLAGS)
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unwind_bench_LDADD = librun_benchmark.la libtcmalloc.la $(PTHREAD_LIBS)
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endif WITH_HEAP_PROFILER_OR_CHECKER
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endif WITH_HEAP_PROFILER_OR_CHECKER
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binary_trees_SOURCES = benchmark/binary_trees.cc
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binary_trees_SOURCES = benchmark/binary_trees.cc
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@ -0,0 +1,60 @@
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#include <ucontext.h>
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#include <stddef.h>
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extern "C" void getcontext_light(ucontext_t *ctx);
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// clang's built-in asm cannot handle .set directives
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#if defined(__GNUC__) && !defined(__llvm__) && defined(__x86_64) && defined(_LP64)
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#define R(r) offsetof(ucontext_t, uc_mcontext.gregs[r])
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static __attribute__((used))
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void getcontext_tramp(ucontext_t *ctx) {
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__asm__ __volatile__(".set oRBX, %c0\n"
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".set oRBP, %c1\n"
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".set oR12, %c2\n"
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".set oR13, %c3\n"
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".set oR14, %c4\n"
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".set oR15, %c5\n"
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".set oRIP, %c6\n"
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".set oRSP, %c7\n"
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: :
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"p" (R(REG_RBX)),
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"p" (R(REG_RBP)),
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"p" (R(REG_R12)),
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"p" (R(REG_R13)),
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"p" (R(REG_R14)),
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"p" (R(REG_R15)),
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"p" (R(REG_RIP)),
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"p" (R(REG_RSP)));
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getcontext_light(ctx);
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}
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__asm__(".pushsection .text; .globl getcontext_light\n"
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".type getcontext_light, @function\n"
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"getcontext_light:\n"
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"\t.cfi_startproc\n"
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"\tmovq %rbx, oRBX(%rdi)\n"
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"\tmovq %rbp, oRBP(%rdi)\n"
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"\tmovq %r12, oR12(%rdi)\n"
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"\tmovq %r13, oR13(%rdi)\n"
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"\tmovq %r14, oR14(%rdi)\n"
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"\tmovq %r15, oR14(%rdi)\n"
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"\tmovq (%rsp), %rcx\n"
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"\tmovq %rcx, oRIP(%rdi)\n"
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"\tleaq 8(%rsp), %rcx\n" /* Exclude the return address. */
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"\tmovq %rcx, oRSP(%rdi)\n"
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"\tret\n"
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".cfi_endproc\n"
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".size getcontext_light, .-getcontext_light\n"
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".popsection\n"
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);
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#else
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extern "C" void getcontext_light(ucontext_t *ctx) {
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getcontext(ctx);
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}
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#endif
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@ -0,0 +1,89 @@
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// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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#include "config.h"
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#include "base/basictypes.h"
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#include "gperftools/stacktrace.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "sys/ucontext.h"
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#if HAVE_LIBUNWIND_H
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#include <libunwind.h>
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#endif
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#include "run_benchmark.h"
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extern "C" void getcontext_light(ucontext_t *ctx);
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#define MAX_FRAMES 1024
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static void *frames[MAX_FRAMES];
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enum measure_mode {
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MODE_NOOP,
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MODE_WITH_CONTEXT,
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MODE_WITHOUT_CONTEXT
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};
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static int ATTRIBUTE_NOINLINE measure_unwind(int maxlevel, int mode) {
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int n;
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if (mode == MODE_NOOP)
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return 0;
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if (mode == MODE_WITH_CONTEXT) {
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ucontext_t uc;
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getcontext_light(&uc);
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n = GetStackTraceWithContext(frames, MAX_FRAMES, 0, &uc);
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} else {
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n = GetStackTrace(frames, MAX_FRAMES, 0);
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}
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if (n < maxlevel) {
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fprintf(stderr, "Expected at least %d frames, got %d\n", maxlevel, n);
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abort();
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}
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return 0;
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}
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static int ATTRIBUTE_NOINLINE frame_forcer(int rv) {
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return rv;
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}
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static int ATTRIBUTE_NOINLINE f1(int level, int maxlevel, int mode) {
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if (level == maxlevel)
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return frame_forcer(measure_unwind(maxlevel, mode));
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return frame_forcer(f1(level + 1, maxlevel, mode));
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}
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static void bench_unwind_no_op(long iterations, uintptr_t param) {
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do {
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f1(0, param, MODE_NOOP);
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iterations -= param;
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} while (iterations > 0);
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}
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static void bench_unwind_context(long iterations, uintptr_t param) {
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do {
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f1(0, param, MODE_WITH_CONTEXT);
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iterations -= param;
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} while (iterations > 0);
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}
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static void bench_unwind_no_context(long iterations, uintptr_t param) {
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do {
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f1(0, param, MODE_WITHOUT_CONTEXT);
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iterations -= param;
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} while (iterations > 0);
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}
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int main(void) {
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report_benchmark("unwind_no_op", bench_unwind_no_op, 100);
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report_benchmark("unwind_context", bench_unwind_context, 100);
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report_benchmark("unwind_no_context", bench_unwind_no_context, 100);
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//// TODO: somehow this fails at linking step. Figure out why this is missing
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// #if HAVE_LIBUNWIND_H
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// unw_set_caching_policy(unw_local_addr_space, UNW_CACHE_PER_THREAD);
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// #endif
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return 0;
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}
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