Scott Anderson | b0114cb | 2012-04-09 14:08:22 -0700 | [diff] [blame] | 1 | // Copyright 2006 Google Inc. All Rights Reserved. |
| 2 | |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | // queue.h : simple queue api |
| 16 | |
| 17 | // This is an interface to a simple thread safe queue, |
| 18 | // used to hold data blocks and patterns. |
| 19 | // The order in which the blocks are returned is random. |
| 20 | |
| 21 | #ifndef STRESSAPPTEST_QUEUE_H_ // NOLINT |
| 22 | #define STRESSAPPTEST_QUEUE_H_ |
| 23 | |
| 24 | #include <sys/types.h> |
| 25 | #include <pthread.h> |
| 26 | |
| 27 | // This file must work with autoconf on its public version, |
| 28 | // so these includes are correct. |
| 29 | #include "sattypes.h" // NOLINT |
| 30 | #include "pattern.h" // NOLINT |
| 31 | |
| 32 | // Tag indicating no preference. |
| 33 | static const int kDontCareTag = -1; |
| 34 | // Tag indicating no preference. |
| 35 | static const int kInvalidTag = 0xf001; |
| 36 | |
| 37 | |
| 38 | // This describes a block of memory, and the expected fill pattern. |
| 39 | struct page_entry { |
| 40 | uint64 offset; |
| 41 | void *addr; |
| 42 | uint64 paddr; |
| 43 | class Pattern *pattern; |
| 44 | int32 tag; // These are tags for use in NUMA affinity or other uses. |
| 45 | uint32 touch; // Counter of the number of reads from this page. |
| 46 | uint64 ts; // Timestamp of the last read from this page. |
| 47 | class Pattern *lastpattern; // Expected Pattern at last read. |
| 48 | }; |
| 49 | |
| 50 | static inline void init_pe(struct page_entry *pe) { |
| 51 | pe->offset = 0; |
| 52 | pe->addr = NULL; |
| 53 | pe->pattern = NULL; |
| 54 | pe->tag = kInvalidTag; |
| 55 | pe->touch = 0; |
| 56 | pe->ts = 0; |
| 57 | pe->lastpattern = NULL; |
| 58 | } |
| 59 | |
| 60 | // This is a threadsafe randomized queue of pages for |
| 61 | // worker threads to use. |
| 62 | class PageEntryQueue { |
| 63 | public: |
| 64 | explicit PageEntryQueue(uint64 queuesize); |
| 65 | ~PageEntryQueue(); |
| 66 | |
| 67 | // Push a page onto the list. |
| 68 | int Push(struct page_entry *pe); |
| 69 | // Pop a random page off of the list. |
| 70 | int PopRandom(struct page_entry *pe); |
| 71 | |
| 72 | private: |
| 73 | struct page_entry *pages_; // Where the pages are held. |
| 74 | int64 nextin_; |
| 75 | int64 nextout_; |
| 76 | int64 q_size_; // Size of the queue. |
| 77 | int64 pushed_; // Number of pages pushed, total. |
| 78 | int64 popped_; // Number of pages popped, total. |
| 79 | pthread_mutex_t q_mutex_; |
| 80 | |
| 81 | DISALLOW_COPY_AND_ASSIGN(PageEntryQueue); |
| 82 | }; |
| 83 | |
| 84 | |
| 85 | #endif // MILES_TESTS_SAT_QUEUE_H_ NOLINT |