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diff src/os/unix/ngx_posix_init.c @ 7173:057adb2a9d23

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Use sysconf to determine cacheline size at runtime. Determine cacheline size at runtime if supported using sysconf(_SC_LEVEL1_DCACHE_LINESIZE). In case not supported, fallback to compile time defaults.
author Debayan Ghosh <debayang.qdt@qualcommdatacenter.com>
date Mon, 11 Dec 2017 16:28:11 +0000
parents 56fc55e32f23
children
line wrap: on
line diff
--- a/src/os/unix/ngx_posix_init.c
+++ b/src/os/unix/ngx_posix_init.c
@@ -36,6 +36,9 @@ ngx_os_init(ngx_log_t *log)
 {
     ngx_time_t  *tp;
     ngx_uint_t   n;
+#if (NGX_HAVE_LEVEL1_DCACHE_LINESIZE)
+    long         size;
+#endif
 
 #if (NGX_HAVE_OS_SPECIFIC_INIT)
     if (ngx_os_specific_init(log) != NGX_OK) {
@@ -62,6 +65,13 @@ ngx_os_init(ngx_log_t *log)
         ngx_ncpu = 1;
     }
 
+#if (NGX_HAVE_LEVEL1_DCACHE_LINESIZE)
+    size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
+    if (size > 0) {
+        ngx_cacheline_size = size;
+    }
+#endif
+
     ngx_cpuinfo();
 
     if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {