From d2d737e70b46429ef9ed71b99402a9151f3c2e1f Mon Sep 17 00:00:00 2001 From: Debayan Ghosh Date: Mon, 11 Dec 2017 16:28:11 +0000 Subject: 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. --- src/os/unix/ngx_posix_init.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'src/os/unix/ngx_posix_init.c') diff --git a/src/os/unix/ngx_posix_init.c b/src/os/unix/ngx_posix_init.c index 583ea4ff9..7824735d0 100644 --- 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) { -- cgit v1.2.3