diff options
| author | Brian Inglis <Brian.Inglis@SystematicSW.ab.ca> | 2019-10-07 19:22:58 +0300 |
|---|---|---|
| committer | Ken Brown <kbrown@cornell.edu> | 2019-10-07 22:50:32 +0300 |
| commit | acc8849f844f2dbc41ef8da9687bbe1c1d5b3bdc (patch) | |
| tree | 83e87d22c3bd96181317999d022ae2df758c374d /winsup/cygwin/fhandler_proc.cc | |
| parent | e06f2fbde7d9d8ca3d363035dacbbc4b81e29c9a (diff) | |
fhandler_proc.cc(format_proc_cpuinfo): fix cache size
Fix cache size return code handling and make AMD/Intel code common.
Diffstat (limited to 'winsup/cygwin/fhandler_proc.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_proc.cc | 45 |
1 files changed, 18 insertions, 27 deletions
diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc index 48476beb8..13cc36858 100644 --- a/winsup/cygwin/fhandler_proc.cc +++ b/winsup/cygwin/fhandler_proc.cc @@ -744,6 +744,8 @@ format_proc_cpuinfo (void *, char *&destbuf) int cache_size = -1, clflush = 64, cache_alignment = 64; + long (*get_cpu_cache) (int, uint32_t) = NULL; + uint32_t max; if (features1 & (1 << 19)) /* CLFSH */ clflush = ((extra_info >> 8) & 0xff) << 3; if (is_intel && family == 15) @@ -751,45 +753,34 @@ format_proc_cpuinfo (void *, char *&destbuf) if (is_intel) { extern long get_cpu_cache_intel (int sysc, uint32_t maxf); - long cs; - - cs = get_cpu_cache_intel (_SC_LEVEL3_CACHE_SIZE, maxf); - if (cs == -1) - cs = get_cpu_cache_intel (_SC_LEVEL2_CACHE_SIZE, maxf); - if (cs == -1) - { - cs = get_cpu_cache_intel (_SC_LEVEL1_ICACHE_SIZE, maxf); - if (cs != -1) - cache_size = cs; - cs = get_cpu_cache_intel (_SC_LEVEL1_DCACHE_SIZE, maxf); - if (cs != -1) - cache_size += cs; - } - else - cache_size = cs; - if (cache_size != -1) - cache_size >>= 10; + get_cpu_cache = get_cpu_cache_intel; + max = maxf; /* Intel uses normal cpuid levels */ } else if (is_amd) { extern long get_cpu_cache_amd (int sysc, uint32_t maxe); + get_cpu_cache = get_cpu_cache_amd; + max = maxe; /* AMD uses extended cpuid levels */ + } + if (get_cpu_cache) + { long cs; - cs = get_cpu_cache_amd (_SC_LEVEL3_CACHE_SIZE, maxe); - if (cs == -1) - cs = get_cpu_cache_amd (_SC_LEVEL2_CACHE_SIZE, maxe); - if (cs == -1) + cs = get_cpu_cache (_SC_LEVEL3_CACHE_SIZE, max); + if (cs <= 0) + cs = get_cpu_cache (_SC_LEVEL2_CACHE_SIZE, max); + if (cs <= 0) { - cs = get_cpu_cache_amd (_SC_LEVEL1_ICACHE_SIZE, maxe); - if (cs != -1) + cs = get_cpu_cache (_SC_LEVEL1_ICACHE_SIZE, max); + if (cs > 0) cache_size = cs; - cs = get_cpu_cache_amd (_SC_LEVEL1_DCACHE_SIZE, maxe); - if (cs != -1) + cs = get_cpu_cache (_SC_LEVEL1_DCACHE_SIZE, max); + if (cs > 0) cache_size += cs; } else cache_size = cs; - if (cache_size != -1) + if (cache_size > 0) cache_size >>= 10; } bufptr += __small_sprintf (bufptr, "cpu family\t: %d\n" |