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bufferlist.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2013 Cloudwatt <[email protected]>
*
* Author: Loic Dachary <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library Public License as published by
* the Free Software Foundation; either version 2, 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 Library Public License for more details.
*
*/
#include <limits.h>
#include <errno.h>
#include <sys/uio.h>
#include "include/buffer.h"
#include "include/buffer_raw.h"
#include "include/compat.h"
#include "include/utime.h"
#include "include/coredumpctl.h"
#include "include/encoding.h"
#include "common/environment.h"
#include "common/Clock.h"
#include "common/safe_io.h"
#include "gtest/gtest.h"
#include "stdlib.h"
#include "fcntl.h"
#include "sys/stat.h"
#include "include/crc32c.h"
#include "common/sctp_crc32.h"
#define MAX_TEST 1000000
#define FILENAME "bufferlist"
static char cmd[128];
struct instrumented_bptr : public ceph::buffer::ptr {
const ceph::buffer::raw* get_raw() const {
return _raw;
}
};
TEST(Buffer, constructors) {
unsigned len = 17;
//
// buffer::create
//
{
bufferptr ptr(buffer::create(len));
EXPECT_EQ(len, ptr.length());
}
//
// buffer::claim_char
//
{
char* str = new char[len];
::memset(str, 'X', len);
bufferptr ptr(buffer::claim_char(len, str));
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(str, ptr.c_str());
bufferptr clone = ptr.clone();
EXPECT_EQ(0, ::memcmp(clone.c_str(), ptr.c_str(), len));
delete [] str;
}
//
// buffer::create_static
//
{
char* str = new char[len];
bufferptr ptr(buffer::create_static(len, str));
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(str, ptr.c_str());
delete [] str;
}
//
// buffer::create_malloc
//
{
bufferptr ptr(buffer::create_malloc(len));
EXPECT_EQ(len, ptr.length());
// this doesn't throw on my x86_64 wheezy box --sage
//EXPECT_THROW(buffer::create_malloc((unsigned)ULLONG_MAX), buffer::bad_alloc);
}
//
// buffer::claim_malloc
//
{
char* str = (char*)malloc(len);
::memset(str, 'X', len);
bufferptr ptr(buffer::claim_malloc(len, str));
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(str, ptr.c_str());
bufferptr clone = ptr.clone();
EXPECT_EQ(0, ::memcmp(clone.c_str(), ptr.c_str(), len));
}
//
// buffer::copy
//
{
const std::string expected(len, 'X');
bufferptr ptr(buffer::copy(expected.c_str(), expected.size()));
EXPECT_NE(expected.c_str(), ptr.c_str());
EXPECT_EQ(0, ::memcmp(expected.c_str(), ptr.c_str(), len));
}
//
// buffer::create_page_aligned
//
{
bufferptr ptr(buffer::create_page_aligned(len));
::memset(ptr.c_str(), 'X', len);
// doesn't throw on my x86_64 wheezy box --sage
//EXPECT_THROW(buffer::create_page_aligned((unsigned)ULLONG_MAX), buffer::bad_alloc);
#ifndef DARWIN
ASSERT_TRUE(ptr.is_page_aligned());
#endif // DARWIN
bufferptr clone = ptr.clone();
EXPECT_EQ(0, ::memcmp(clone.c_str(), ptr.c_str(), len));
}
}
void bench_buffer_alloc(int size, int num)
{
utime_t start = ceph_clock_now();
for (int i=0; i<num; ++i) {
bufferptr p = buffer::create(size);
p.zero();
}
utime_t end = ceph_clock_now();
cout << num << " alloc of size " << size
<< " in " << (end - start) << std::endl;
}
TEST(Buffer, BenchAlloc) {
bench_buffer_alloc(16384, 1000000);
bench_buffer_alloc(4096, 1000000);
bench_buffer_alloc(1024, 1000000);
bench_buffer_alloc(256, 1000000);
bench_buffer_alloc(32, 1000000);
bench_buffer_alloc(4, 1000000);
}
TEST(BufferRaw, ostream) {
bufferptr ptr(1);
std::ostringstream stream;
stream << *static_cast<instrumented_bptr&>(ptr).get_raw();
EXPECT_GT(stream.str().size(), stream.str().find("buffer::raw("));
EXPECT_GT(stream.str().size(), stream.str().find("len 1 nref 1)"));
}
//
// +-----------+ +-----+
// | | | |
// | offset +----------------+ |
// | | | |
// | length +---- | |
// | | \------- | |
// +-----------+ \---+ |
// | ptr | +-----+
// +-----------+ | raw |
// +-----+
//
TEST(BufferPtr, constructors) {
unsigned len = 17;
//
// ptr::ptr()
//
{
buffer::ptr ptr;
EXPECT_FALSE(ptr.have_raw());
EXPECT_EQ((unsigned)0, ptr.offset());
EXPECT_EQ((unsigned)0, ptr.length());
}
//
// ptr::ptr(raw *r)
//
{
bufferptr ptr(buffer::create(len));
EXPECT_TRUE(ptr.have_raw());
EXPECT_EQ((unsigned)0, ptr.offset());
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(ptr.raw_length(), ptr.length());
EXPECT_EQ(1, ptr.raw_nref());
}
//
// ptr::ptr(unsigned l)
//
{
bufferptr ptr(len);
EXPECT_TRUE(ptr.have_raw());
EXPECT_EQ((unsigned)0, ptr.offset());
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(1, ptr.raw_nref());
}
//
// ptr(const char *d, unsigned l)
//
{
const std::string str(len, 'X');
bufferptr ptr(str.c_str(), len);
EXPECT_TRUE(ptr.have_raw());
EXPECT_EQ((unsigned)0, ptr.offset());
EXPECT_EQ(len, ptr.length());
EXPECT_EQ(1, ptr.raw_nref());
EXPECT_EQ(0, ::memcmp(str.c_str(), ptr.c_str(), len));
}
//
// ptr(const ptr& p)
//
{
const std::string str(len, 'X');
bufferptr original(str.c_str(), len);
bufferptr ptr(original);
EXPECT_TRUE(ptr.have_raw());
EXPECT_EQ(static_cast<instrumented_bptr&>(original).get_raw(),
static_cast<instrumented_bptr&>(ptr).get_raw());
EXPECT_EQ(2, ptr.raw_nref());
EXPECT_EQ(0, ::memcmp(original.c_str(), ptr.c_str(), len));
}
//
// ptr(const ptr& p, unsigned o, unsigned l)
//
{
const std::string str(len, 'X');
bufferptr original(str.c_str(), len);
bufferptr ptr(original, 0, 0);
EXPECT_TRUE(ptr.have_raw());
EXPECT_EQ(static_cast<instrumented_bptr&>(original).get_raw(),
static_cast<instrumented_bptr&>(ptr).get_raw());
EXPECT_EQ(2, ptr.raw_nref());
EXPECT_EQ(0, ::memcmp(original.c_str(), ptr.c_str(), len));
PrCtl unset_dumpable;
EXPECT_DEATH(bufferptr(original, 0, original.length() + 1), "");
EXPECT_DEATH(bufferptr(bufferptr(), 0, 0), "");
}
//
// ptr(ptr&& p)
//
{
const std::string str(len, 'X');
bufferptr original(str.c_str(), len);
bufferptr ptr(std::move(original));
EXPECT_TRUE(ptr.have_raw());
EXPECT_FALSE(original.have_raw());
EXPECT_EQ(0, ::memcmp(str.c_str(), ptr.c_str(), len));
EXPECT_EQ(1, ptr.raw_nref());
}
}
TEST(BufferPtr, operator_assign) {
//
// ptr& operator= (const ptr& p)
//
bufferptr ptr(10);
ptr.copy_in(0, 3, "ABC");
char dest[1];
{
bufferptr copy = ptr;
copy.copy_out(1, 1, dest);
ASSERT_EQ('B', dest[0]);
}
//
// ptr& operator= (ptr&& p)
//
bufferptr move = std::move(ptr);
{
move.copy_out(1, 1, dest);
ASSERT_EQ('B', dest[0]);
}
EXPECT_FALSE(ptr.have_raw());
}
TEST(BufferPtr, assignment) {
unsigned len = 17;
//
// override a bufferptr set with the same raw
//
{
bufferptr original(len);
bufferptr same_raw(original);
unsigned offset = 5;
unsigned length = len - offset;
original.set_offset(offset);
original.set_length(length);
same_raw = original;
ASSERT_EQ(2, original.raw_nref());
ASSERT_EQ(static_cast<instrumented_bptr&>(same_raw).get_raw(),
static_cast<instrumented_bptr&>(original).get_raw());
ASSERT_EQ(same_raw.offset(), original.offset());
ASSERT_EQ(same_raw.length(), original.length());
}
//
// self assignment is a noop
//
{
bufferptr original(len);
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wself-assign-overloaded"
original = original;
#pragma clang diagnostic pop
ASSERT_EQ(1, original.raw_nref());
ASSERT_EQ((unsigned)0, original.offset());
ASSERT_EQ(len, original.length());
}
//
// a copy points to the same raw
//
{
bufferptr original(len);
unsigned offset = 5;
unsigned length = len - offset;
original.set_offset(offset);
original.set_length(length);
bufferptr ptr;
ptr = original;
ASSERT_EQ(2, original.raw_nref());
ASSERT_EQ(static_cast<instrumented_bptr&>(ptr).get_raw(),
static_cast<instrumented_bptr&>(original).get_raw());
ASSERT_EQ(original.offset(), ptr.offset());
ASSERT_EQ(original.length(), ptr.length());
}
}
TEST(BufferPtr, clone) {
unsigned len = 17;
bufferptr ptr(len);
::memset(ptr.c_str(), 'X', len);
bufferptr clone = ptr.clone();
EXPECT_EQ(0, ::memcmp(clone.c_str(), ptr.c_str(), len));
}
TEST(BufferPtr, swap) {
unsigned len = 17;
bufferptr ptr1(len);
::memset(ptr1.c_str(), 'X', len);
unsigned ptr1_offset = 4;
ptr1.set_offset(ptr1_offset);
unsigned ptr1_length = 3;
ptr1.set_length(ptr1_length);
bufferptr ptr2(len);
::memset(ptr2.c_str(), 'Y', len);
unsigned ptr2_offset = 5;
ptr2.set_offset(ptr2_offset);
unsigned ptr2_length = 7;
ptr2.set_length(ptr2_length);
ptr1.swap(ptr2);
EXPECT_EQ(ptr2_length, ptr1.length());
EXPECT_EQ(ptr2_offset, ptr1.offset());
EXPECT_EQ('Y', ptr1[0]);
EXPECT_EQ(ptr1_length, ptr2.length());
EXPECT_EQ(ptr1_offset, ptr2.offset());
EXPECT_EQ('X', ptr2[0]);
}
TEST(BufferPtr, release) {
unsigned len = 17;
bufferptr ptr1(len);
{
bufferptr ptr2(ptr1);
EXPECT_EQ(2, ptr1.raw_nref());
}
EXPECT_EQ(1, ptr1.raw_nref());
}
TEST(BufferPtr, have_raw) {
{
bufferptr ptr;
EXPECT_FALSE(ptr.have_raw());
}
{
bufferptr ptr(1);
EXPECT_TRUE(ptr.have_raw());
}
}
TEST(BufferPtr, is_n_page_sized) {
{
bufferptr ptr(CEPH_PAGE_SIZE);
EXPECT_TRUE(ptr.is_n_page_sized());
}
{
bufferptr ptr(1);
EXPECT_FALSE(ptr.is_n_page_sized());
}
}
TEST(BufferPtr, is_partial) {
bufferptr a;
EXPECT_FALSE(a.is_partial());
bufferptr b(10);
EXPECT_FALSE(b.is_partial());
bufferptr c(b, 1, 9);
EXPECT_TRUE(c.is_partial());
bufferptr d(b, 0, 9);
EXPECT_TRUE(d.is_partial());
}
TEST(BufferPtr, accessors) {
unsigned len = 17;
bufferptr ptr(len);
ptr.c_str()[0] = 'X';
ptr[1] = 'Y';
const bufferptr const_ptr(ptr);
EXPECT_NE((void*)nullptr, (void*)static_cast<instrumented_bptr&>(ptr).get_raw());
EXPECT_EQ('X', ptr.c_str()[0]);
{
bufferptr ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.c_str(), "");
EXPECT_DEATH(ptr[0], "");
}
EXPECT_EQ('X', const_ptr.c_str()[0]);
{
const bufferptr const_ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(const_ptr.c_str(), "");
EXPECT_DEATH(const_ptr[0], "");
}
EXPECT_EQ(len, const_ptr.length());
EXPECT_EQ((unsigned)0, const_ptr.offset());
EXPECT_EQ((unsigned)0, const_ptr.start());
EXPECT_EQ(len, const_ptr.end());
EXPECT_EQ(len, const_ptr.end());
{
bufferptr ptr(len);
unsigned unused = 1;
ptr.set_length(ptr.length() - unused);
EXPECT_EQ(unused, ptr.unused_tail_length());
}
{
bufferptr ptr;
EXPECT_EQ((unsigned)0, ptr.unused_tail_length());
}
{
PrCtl unset_dumpable;
EXPECT_DEATH(ptr[len], "");
EXPECT_DEATH(const_ptr[len], "");
}
{
const bufferptr const_ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(const_ptr.raw_c_str(), "");
EXPECT_DEATH(const_ptr.raw_length(), "");
EXPECT_DEATH(const_ptr.raw_nref(), "");
}
EXPECT_NE((const char *)NULL, const_ptr.raw_c_str());
EXPECT_EQ(len, const_ptr.raw_length());
EXPECT_EQ(2, const_ptr.raw_nref());
{
bufferptr ptr(len);
unsigned wasted = 1;
ptr.set_length(ptr.length() - wasted * 2);
ptr.set_offset(wasted);
EXPECT_EQ(wasted * 2, ptr.wasted());
}
}
TEST(BufferPtr, cmp) {
bufferptr empty;
bufferptr a("A", 1);
bufferptr ab("AB", 2);
bufferptr af("AF", 2);
bufferptr acc("ACC", 3);
EXPECT_GE(-1, empty.cmp(a));
EXPECT_LE(1, a.cmp(empty));
EXPECT_GE(-1, a.cmp(ab));
EXPECT_LE(1, ab.cmp(a));
EXPECT_EQ(0, ab.cmp(ab));
EXPECT_GE(-1, ab.cmp(af));
EXPECT_LE(1, af.cmp(ab));
EXPECT_GE(-1, acc.cmp(af));
EXPECT_LE(1, af.cmp(acc));
}
TEST(BufferPtr, is_zero) {
char str[2] = { '\0', 'X' };
{
const bufferptr ptr(buffer::create_static(2, str));
EXPECT_FALSE(ptr.is_zero());
}
{
const bufferptr ptr(buffer::create_static(1, str));
EXPECT_TRUE(ptr.is_zero());
}
}
TEST(BufferPtr, copy_out) {
{
const bufferptr ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.copy_out((unsigned)0, (unsigned)0, NULL), "");
}
{
char in[] = "ABC";
const bufferptr ptr(buffer::create_static(strlen(in), in));
EXPECT_THROW(ptr.copy_out((unsigned)0, strlen(in) + 1, NULL), buffer::end_of_buffer);
EXPECT_THROW(ptr.copy_out(strlen(in) + 1, (unsigned)0, NULL), buffer::end_of_buffer);
char out[1] = { 'X' };
ptr.copy_out((unsigned)1, (unsigned)1, out);
EXPECT_EQ('B', out[0]);
}
}
TEST(BufferPtr, copy_out_bench) {
for (int s=1; s<=8; s*=2) {
utime_t start = ceph_clock_now();
int buflen = 1048576;
int count = 1000;
uint64_t v;
for (int i=0; i<count; ++i) {
bufferptr bp(buflen);
for (int64_t j=0; j<buflen; j += s) {
bp.copy_out(j, s, (char *)&v);
}
}
utime_t end = ceph_clock_now();
cout << count << " fills of buffer len " << buflen
<< " with " << s << " byte copy_out in "
<< (end - start) << std::endl;
}
}
TEST(BufferPtr, copy_in) {
{
bufferptr ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.copy_in((unsigned)0, (unsigned)0, NULL), "");
}
{
char in[] = "ABCD";
bufferptr ptr(2);
{
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.copy_in((unsigned)0, strlen(in) + 1, NULL), "");
EXPECT_DEATH(ptr.copy_in(strlen(in) + 1, (unsigned)0, NULL), "");
}
ptr.copy_in((unsigned)0, (unsigned)2, in);
EXPECT_EQ(in[0], ptr[0]);
EXPECT_EQ(in[1], ptr[1]);
}
}
TEST(BufferPtr, copy_in_bench) {
for (int s=1; s<=8; s*=2) {
utime_t start = ceph_clock_now();
int buflen = 1048576;
int count = 1000;
for (int i=0; i<count; ++i) {
bufferptr bp(buflen);
for (int64_t j=0; j<buflen; j += s) {
bp.copy_in(j, s, (char *)&j, false);
}
}
utime_t end = ceph_clock_now();
cout << count << " fills of buffer len " << buflen
<< " with " << s << " byte copy_in in "
<< (end - start) << std::endl;
}
}
TEST(BufferPtr, append) {
{
bufferptr ptr;
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.append('A'), "");
EXPECT_DEATH(ptr.append("B", (unsigned)1), "");
}
{
bufferptr ptr(2);
{
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.append('A'), "");
EXPECT_DEATH(ptr.append("B", (unsigned)1), "");
}
ptr.set_length(0);
ptr.append('A');
EXPECT_EQ((unsigned)1, ptr.length());
EXPECT_EQ('A', ptr[0]);
ptr.append("B", (unsigned)1);
EXPECT_EQ((unsigned)2, ptr.length());
EXPECT_EQ('B', ptr[1]);
}
}
TEST(BufferPtr, append_bench) {
char src[1048576];
memset(src, 0, sizeof(src));
for (int s=4; s<=16384; s*=4) {
utime_t start = ceph_clock_now();
int buflen = 1048576;
int count = 4000;
for (int i=0; i<count; ++i) {
bufferptr bp(buflen);
bp.set_length(0);
for (int64_t j=0; j<buflen; j += s) {
bp.append(src + j, s);
}
}
utime_t end = ceph_clock_now();
cout << count << " fills of buffer len " << buflen
<< " with " << s << " byte appends in "
<< (end - start) << std::endl;
}
}
TEST(BufferPtr, zero) {
char str[] = "XXXX";
bufferptr ptr(buffer::create_static(strlen(str), str));
{
PrCtl unset_dumpable;
EXPECT_DEATH(ptr.zero(ptr.length() + 1, 0), "");
}
ptr.zero(1, 1);
EXPECT_EQ('X', ptr[0]);
EXPECT_EQ('\0', ptr[1]);
EXPECT_EQ('X', ptr[2]);
ptr.zero();
EXPECT_EQ('\0', ptr[0]);
}
TEST(BufferPtr, ostream) {
{
bufferptr ptr;
std::ostringstream stream;
stream << ptr;
EXPECT_GT(stream.str().size(), stream.str().find("buffer:ptr(0~0 no raw"));
}
{
char str[] = "XXXX";
bufferptr ptr(buffer::create_static(strlen(str), str));
std::ostringstream stream;
stream << ptr;
EXPECT_GT(stream.str().size(), stream.str().find("len 4 nref 1)"));
}
}
//
// +---------+
// | +-----+ |
// list ptr | | | |
// +----------+ +-----+ | | | |
// | append_ >-------> >--------------------> | |
// | buffer | +-----+ | | | |
// +----------+ ptr | | | |
// | _len | list +-----+ | | | |
// +----------+ +------+ ,--->+ >-----> | |
// | _buffers >----> >----- +-----+ | +-----+ |
// +----------+ +----^-+ \ ptr | raw |
// | last_p | / `-->+-----+ | +-----+ |
// +--------+-+ / + >-----> | |
// | ,- ,--->+-----+ | | | |
// | / ,--- | | | |
// | / ,--- | | | |
// +-v--+-^--+--^+-------+ | | | |
// | bl | ls | p | p_off >--------------->| | |
// +----+----+-----+-----+ | +-----+ |
// | | off >------------->| raw |
// +---------------+-----+ | |
// iterator +---------+
//
TEST(BufferListIterator, constructors) {
//
// iterator()
//
{
buffer::list::iterator i;
EXPECT_EQ((unsigned)0, i.get_off());
}
//
// iterator(list *l, unsigned o=0)
//
{
bufferlist bl;
bl.append("ABC", 3);
{
bufferlist::iterator i(&bl);
EXPECT_EQ((unsigned)0, i.get_off());
EXPECT_EQ('A', *i);
}
{
bufferlist::iterator i(&bl, 1);
EXPECT_EQ('B', *i);
EXPECT_EQ((unsigned)2, i.get_remaining());
}
}
//
// iterator(list *l, unsigned o, std::list<ptr>::iterator ip, unsigned po)
// not tested because of http://tracker.ceph.com/issues/4101
//
// iterator(const iterator& other)
//
{
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl, 1);
bufferlist::iterator j(i);
EXPECT_EQ(*i, *j);
++j;
EXPECT_NE(*i, *j);
EXPECT_EQ('B', *i);
EXPECT_EQ('C', *j);
bl.c_str()[1] = 'X';
}
//
// const_iterator(const iterator& other)
//
{
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl);
bufferlist::const_iterator ci(i);
EXPECT_EQ(0u, ci.get_off());
EXPECT_EQ('A', *ci);
}
}
TEST(BufferListIterator, empty_create_append_copy) {
bufferlist bl, bl2, bl3, out;
bl2.append("bar");
bl.swap(bl2);
bl2.append("xxx");
bl.append(bl2);
bl.rebuild();
bl.begin().copy(6, out);
ASSERT_TRUE(out.contents_equal(bl));
}
TEST(BufferListIterator, operator_assign) {
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl, 1);
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wself-assign-overloaded"
i = i;
#pragma clang diagnostic pop
EXPECT_EQ('B', *i);
bufferlist::iterator j;
j = i;
EXPECT_EQ('B', *j);
}
TEST(BufferListIterator, get_off) {
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl, 1);
EXPECT_EQ((unsigned)1, i.get_off());
}
TEST(BufferListIterator, get_remaining) {
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl, 1);
EXPECT_EQ((unsigned)2, i.get_remaining());
}
TEST(BufferListIterator, end) {
bufferlist bl;
{
bufferlist::iterator i(&bl);
EXPECT_TRUE(i.end());
}
bl.append("ABC", 3);
{
bufferlist::iterator i(&bl);
EXPECT_FALSE(i.end());
}
}
static void bench_bufferlistiter_deref(const size_t step,
const size_t bufsize,
const size_t bufnum) {
const std::string buf(bufsize, 'a');
ceph::bufferlist bl;
for (size_t i = 0; i < bufnum; i++) {
bl.append(ceph::bufferptr(buf.c_str(), buf.size()));
}
utime_t start = ceph_clock_now();
bufferlist::iterator iter = bl.begin();
while (iter != bl.end()) {
iter += step;
}
utime_t end = ceph_clock_now();
cout << bufsize * bufnum << " derefs over bl with " << bufnum
<< " buffers, each " << bufsize << " bytes long"
<< " in " << (end - start) << std::endl;
}
TEST(BufferListIterator, BenchDeref) {
bench_bufferlistiter_deref(1, 1, 4096000);
bench_bufferlistiter_deref(1, 10, 409600);
bench_bufferlistiter_deref(1, 100, 40960);
bench_bufferlistiter_deref(1, 1000, 4096);
bench_bufferlistiter_deref(4, 1, 1024000);
bench_bufferlistiter_deref(4, 10, 102400);
bench_bufferlistiter_deref(4, 100, 10240);
bench_bufferlistiter_deref(4, 1000, 1024);
}
TEST(BufferListIterator, advance) {
bufferlist bl;
const std::string one("ABC");
bl.append(bufferptr(one.c_str(), one.size()));
const std::string two("DEF");
bl.append(bufferptr(two.c_str(), two.size()));
{
bufferlist::iterator i(&bl);
EXPECT_THROW(i += 200u, buffer::end_of_buffer);
}
{
bufferlist::iterator i(&bl);
EXPECT_EQ('A', *i);
i += 1u;
EXPECT_EQ('B', *i);
i += 3u;
EXPECT_EQ('E', *i);
}
}
TEST(BufferListIterator, iterate_with_empties) {
ceph::bufferlist bl;
EXPECT_EQ(bl.get_num_buffers(), 0u);
bl.push_back(ceph::buffer::create(0));
EXPECT_EQ(bl.length(), 0u);
EXPECT_EQ(bl.get_num_buffers(), 1u);
encode(int64_t(42), bl);
EXPECT_EQ(bl.get_num_buffers(), 2u);
bl.push_back(ceph::buffer::create(0));
EXPECT_EQ(bl.get_num_buffers(), 3u);
// append bufferlist with single, 0-sized ptr inside
{
ceph::bufferlist bl_with_empty_ptr;
bl_with_empty_ptr.push_back(ceph::buffer::create(0));
EXPECT_EQ(bl_with_empty_ptr.length(), 0u);
EXPECT_EQ(bl_with_empty_ptr.get_num_buffers(), 1u);
bl.append(bl_with_empty_ptr);
}
encode(int64_t(24), bl);
EXPECT_EQ(bl.get_num_buffers(), 5u);
auto i = bl.cbegin();
int64_t val;
decode(val, i);
EXPECT_EQ(val, 42l);
decode(val, i);
EXPECT_EQ(val, 24l);
val = 0;
i.seek(sizeof(val));
decode(val, i);
EXPECT_EQ(val, 24l);
EXPECT_TRUE(i == bl.end());
i.seek(0);
decode(val, i);
EXPECT_EQ(val, 42);
EXPECT_FALSE(i == bl.end());
}
TEST(BufferListIterator, get_ptr_and_advance)
{
bufferptr a("one", 3);
bufferptr b("two", 3);
bufferptr c("three", 5);
bufferlist bl;
bl.append(a);
bl.append(b);
bl.append(c);
const char *ptr;
bufferlist::iterator p = bl.begin();
ASSERT_EQ(3u, p.get_ptr_and_advance(11u, &ptr));
ASSERT_EQ(bl.length() - 3u, p.get_remaining());
ASSERT_EQ(0, memcmp(ptr, "one", 3));
ASSERT_EQ(2u, p.get_ptr_and_advance(2u, &ptr));
ASSERT_EQ(0, memcmp(ptr, "tw", 2));
ASSERT_EQ(1u, p.get_ptr_and_advance(4u, &ptr));
ASSERT_EQ(0, memcmp(ptr, "o", 1));
ASSERT_EQ(5u, p.get_ptr_and_advance(5u, &ptr));
ASSERT_EQ(0, memcmp(ptr, "three", 5));
ASSERT_EQ(0u, p.get_remaining());
}
TEST(BufferListIterator, iterator_crc32c) {
bufferlist bl1;
bufferlist bl2;
bufferlist bl3;
string s1(100, 'a');
string s2(50, 'b');
string s3(7, 'c');
string s;
bl1.append(s1);
bl1.append(s2);
bl1.append(s3);
s = s1 + s2 + s3;
bl2.append(s);
bufferlist::iterator it = bl2.begin();
ASSERT_EQ(bl1.crc32c(0), it.crc32c(it.get_remaining(), 0));
ASSERT_EQ(0u, it.get_remaining());
it = bl1.begin();
ASSERT_EQ(bl2.crc32c(0), it.crc32c(it.get_remaining(), 0));
bl3.append(s.substr(98, 55));
it = bl1.begin();
it += 98u;
ASSERT_EQ(bl3.crc32c(0), it.crc32c(55, 0));
ASSERT_EQ(4u, it.get_remaining());
bl3.clear();
bl3.append(s.substr(98 + 55));
it = bl1.begin();
it += 98u + 55u;
ASSERT_EQ(bl3.crc32c(0), it.crc32c(10, 0));
ASSERT_EQ(0u, it.get_remaining());
}
TEST(BufferListIterator, seek) {
bufferlist bl;
bl.append("ABC", 3);
bufferlist::iterator i(&bl, 1);
EXPECT_EQ('B', *i);
i.seek(2);
EXPECT_EQ('C', *i);
}
TEST(BufferListIterator, operator_star) {
bufferlist bl;
{
bufferlist::iterator i(&bl);
EXPECT_THROW(*i, buffer::end_of_buffer);
}
bl.append("ABC", 3);
{
bufferlist::iterator i(&bl);
EXPECT_EQ('A', *i);
EXPECT_THROW(i += 200u, buffer::end_of_buffer);
EXPECT_THROW(*i, buffer::end_of_buffer);
}
}
TEST(BufferListIterator, operator_equal) {
bufferlist bl;
bl.append("ABC", 3);
{
bufferlist::iterator i(&bl);
bufferlist::iterator j(&bl);
EXPECT_EQ(i, j);
}
{
bufferlist::const_iterator ci = bl.begin();
bufferlist::iterator i = bl.begin();
EXPECT_EQ(i, ci);
EXPECT_EQ(ci, i);
}
}
TEST(BufferListIterator, operator_nequal) {
bufferlist bl;
bl.append("ABC", 3);
{
bufferlist::iterator i(&bl);
bufferlist::iterator j(&bl);