config.h

来自「ICS 课程的Lab7」· C头文件 代码 · 共 48 行

#ifndef __CONGIF_H_
#define __CONFIG_H_

/*
 * config.h - malloc lab configuration file
 *
 * Copyright (c) 2002, R. Bryant and D. O'Hallaron, All rights reserved.
 * May not be used, modified, or copied without permission.
 * 
 */

/*
 * This constant gives the estimated performance of the libc malloc
 * package on our traces on some reference system, typically the same
 * kind of system the students use. Its purpose is to cap the
 * contribution of throughput to the performance index. Once the
 * students surpass the AVG_LIBC_THRUPUT, they get no further benefit
 * to their score.  This deters students from building extremely fast,
 * but extremely stupid malloc packages.  
*/
#define AVG_LIBC_THRUPUT      600E3  /* 600 Kops/sec */

 /* 
  * This constant determines the contributions of space utilization
  * (UTIL_WEIGHT) and throughput (1 - UTIL_WEIGHT) to the performance
  * index.  
*/
#define UTIL_WEIGHT .60

/* 
 * Alignment requirement in bytes (either 4 or 8) 
 */
#define ALIGNMENT 8  

/* 
 * Maximum heap size in bytes 
 */
#define MAX_HEAP (20*(1<<20))  /* 20 MB */

/*****************************************************************************
 * Set exactly one of these USE_xxx constants to "1" to select a timing method
 *****************************************************************************/
#define USE_FCYC   1   /* cycle counter and K-best scheme (x86 and Alpha only) */
#define USE_ITIMER 0   /* interval timer (any Unix box) */
#define USE_GETTOD 0   /* gettimeofday (any Unix box) */

#endif /* __CONFIG_H */