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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 Inktank Storage, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <iostream>
#include <sstream>
#include <errno.h>
#include <signal.h>
#include "osd/ECCommon.h"
#include "osd/ECBackend.h"
#include "gtest/gtest.h"
using namespace std;
TEST(ECUtil, stripe_info_t)
{
const uint64_t swidth = 4096;
const uint64_t ssize = 4;
ECUtil::stripe_info_t s(ssize, swidth);
ASSERT_EQ(s.get_stripe_width(), swidth);
ASSERT_EQ(s.logical_to_next_chunk_offset(0), 0u);
ASSERT_EQ(s.logical_to_next_chunk_offset(1), s.get_chunk_size());
ASSERT_EQ(s.logical_to_next_chunk_offset(swidth - 1),
s.get_chunk_size());
ASSERT_EQ(s.logical_to_prev_chunk_offset(0), 0u);
ASSERT_EQ(s.logical_to_prev_chunk_offset(swidth), s.get_chunk_size());
ASSERT_EQ(s.logical_to_prev_chunk_offset((swidth * 2) - 1),
s.get_chunk_size());
ASSERT_EQ(s.logical_to_next_stripe_offset(0), 0u);
ASSERT_EQ(s.logical_to_next_stripe_offset(swidth - 1),
s.get_stripe_width());
ASSERT_EQ(s.logical_to_prev_stripe_offset(swidth), s.get_stripe_width());
ASSERT_EQ(s.logical_to_prev_stripe_offset(swidth), s.get_stripe_width());
ASSERT_EQ(s.logical_to_prev_stripe_offset((swidth * 2) - 1),
s.get_stripe_width());
ASSERT_EQ(s.aligned_logical_offset_to_chunk_offset(2*swidth),
2*s.get_chunk_size());
ASSERT_EQ(s.aligned_chunk_offset_to_logical_offset(2*s.get_chunk_size()),
2*s.get_stripe_width());
ASSERT_EQ(s.chunk_aligned_offset_len_to_chunk(
make_pair(swidth+s.get_chunk_size(), 10*swidth)),
make_pair(s.get_chunk_size(), 10*s.get_chunk_size()));
ASSERT_EQ(s.chunk_aligned_offset_len_to_chunk(make_pair(swidth, 10*swidth)),
make_pair(s.get_chunk_size(), 10*s.get_chunk_size()));
// round down offset if it's under stripe width
ASSERT_EQ(s.chunk_aligned_offset_len_to_chunk(make_pair(s.get_chunk_size(), 10*swidth)),
make_pair<uint64_t>(0, 10*s.get_chunk_size()));
// round up size if above stripe
ASSERT_EQ(s.chunk_aligned_offset_len_to_chunk(make_pair(s.get_chunk_size(),
10*swidth + s.get_chunk_size())),
make_pair<uint64_t>(0, 11*s.get_chunk_size()));
ASSERT_EQ(s.offset_len_to_stripe_bounds(make_pair(swidth-10, (uint64_t)20)),
make_pair((uint64_t)0, 2*swidth));
}
TEST(ECUtil, offset_length_is_same_stripe)
{
const uint64_t swidth = 4096;
const uint64_t schunk = 1024;
const uint64_t ssize = 4;
ECUtil::stripe_info_t s(ssize, swidth);
ASSERT_EQ(s.get_stripe_width(), swidth);
ASSERT_EQ(s.get_chunk_size(), schunk);
// read nothing at the very beginning
// +---+---+---+---+
// | 0| | | |
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(0, 0));
// read nothing at the stripe end
// +---+---+---+---+
// | | | | 0|
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(swidth, 0));
// read single byte at the stripe end
// +---+---+---+---+
// | | | | ~1|
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(swidth - 1, 1));
// read single stripe
// +---+---+---+---+
// | 1k| 1k| 1k| 1k|
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(0, swidth));
// read single chunk
// +---+---+---+---+
// | 1k| | | |
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(0, schunk));
// read single stripe except its first chunk
// +---+---+---+---+
// | | 1k| 1k| 1k|
// +---+---+---+---+
// | | | | |
// +---+---+---+---+
ASSERT_TRUE(s.offset_length_is_same_stripe(schunk, swidth - schunk));
// read two stripes
// +---+---+---+---+
// | 1k| 1k| 1k| 1k|
// +---+---+---+---+
// | 1k| 1k| 1k| 1k|
// +---+---+---+---+
ASSERT_FALSE(s.offset_length_is_same_stripe(0, 2*swidth));
// multistripe read: 1st stripe without 1st byte + 1st byte of 2nd stripe
// +-----+---+---+---+
// | 1k-1| 1k| 1k| 1k|
// +-----+---+---+---+
// | 1| | | |
// +-----+---+---+---+
ASSERT_FALSE(s.offset_length_is_same_stripe(1, swidth));
}
TEST(ECCommon, get_min_want_to_read_shards)
{
const uint64_t swidth = 4096;
const uint64_t ssize = 4;
ECUtil::stripe_info_t s(ssize, swidth);
ASSERT_EQ(s.get_stripe_width(), swidth);
ASSERT_EQ(s.get_chunk_size(), 1024);
const std::vector<int> chunk_mapping = {}; // no remapping
// read nothing at the very beginning
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
0, 0, s, chunk_mapping, &want_to_read);
ASSERT_TRUE(want_to_read == std::set<int>{});
}
// read nothing at the middle (0-sized partial read)
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
2048, 0, s, chunk_mapping, &want_to_read);
ASSERT_TRUE(want_to_read == std::set<int>{});
}
// read not-so-many (< chunk_size) bytes at the middle (partial read)
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
2048, 42, s, chunk_mapping, &want_to_read);
ASSERT_TRUE(want_to_read == std::set<int>{2});
}
// read more (> chunk_size) bytes at the middle (partial read)
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
1024, 1024+42, s, chunk_mapping, &want_to_read);
// extra () due to a language / macro limitation
ASSERT_TRUE(want_to_read == (std::set<int>{1, 2}));
}
// full stripe except last chunk
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
0, 3*1024, s, chunk_mapping, &want_to_read);
// extra () due to a language / macro limitation
ASSERT_TRUE(want_to_read == (std::set<int>{0, 1, 2}));
}
// full stripe except 1st chunk
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
1024, swidth-1024, s, chunk_mapping, &want_to_read);
// extra () due to a language / macro limitation
ASSERT_TRUE(want_to_read == (std::set<int>{1, 2, 3}));
}
// large, multi-stripe read starting just after 1st chunk
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
1024, swidth*42, s, chunk_mapping, &want_to_read);
// extra () due to a language / macro limitation
ASSERT_TRUE(want_to_read == (std::set<int>{0, 1, 2, 3}));
}
// large read from the beginning
{
std::set<int> want_to_read;
ECCommon::ReadPipeline::get_min_want_to_read_shards(
0, swidth*42, s, chunk_mapping, &want_to_read);
// extra () due to a language / macro limitation
ASSERT_TRUE(want_to_read == (std::set<int>{0, 1, 2, 3}));
}
}
TEST(ECCommon, get_min_want_to_read_shards_bug67087)
{
const uint64_t swidth = 4096;
const uint64_t ssize = 4;
ECUtil::stripe_info_t s(ssize, swidth);
ASSERT_EQ(s.get_stripe_width(), swidth);
ASSERT_EQ(s.get_chunk_size(), 1024);
const std::vector<int> chunk_mapping = {}; // no remapping
std::set<int> want_to_read;
// multitple calls with the same want_to_read can happen during
// multi-region reads.
{
ECCommon::ReadPipeline::get_min_want_to_read_shards(
512, 512, s, chunk_mapping, &want_to_read);
ASSERT_EQ(want_to_read, std::set<int>{0});
ECCommon::ReadPipeline::get_min_want_to_read_shards(
512+16*1024, 512, s, chunk_mapping, &want_to_read);
ASSERT_EQ(want_to_read, std::set<int>{0});
}
}
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