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comparison src/core/ngx_cpuinfo.c @ 1872:8e88522cb6da

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detect L2 cache line size for Intel Core
author Igor Sysoev <igor@sysoev.ru>
date Tue, 29 Jan 2008 07:06:18 +0000
parents 9afb84c7cc61
children b863be280d3b
comparison
equal deleted inserted replaced
1871:9afb84c7cc61 1872:8e88522cb6da
94 94
95 switch ((cpu[0] & 0xf00) >> 8) { 95 switch ((cpu[0] & 0xf00) >> 8) {
96 96
97 /* Pentium */ 97 /* Pentium */
98 case 5: 98 case 5:
99 ngx_cacheline_size = 32;
100 break;
101
99 /* Pentium Pro, II, III */ 102 /* Pentium Pro, II, III */
100 case 6: 103 case 6:
101 ngx_cacheline_size = 32; 104 ngx_cacheline_size = 32;
105
106 if ((cpu[0] & 0xf0) >= 0xd0) {
107 /* Intel Core */
108 ngx_cacheline_size = 64;
109 }
110
102 break; 111 break;
103 112
104 /* 113 /*
105 * Pentium 4, although its cache line size is 64 bytes, 114 * Pentium 4, although its cache line size is 64 bytes,
106 * it prefetches up to two cache lines during memory read 115 * it prefetches up to two cache lines during memory read