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Code Issues Releases Wiki Activity

kernel: improve portability

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This commit is contained in:
Steffen Vogel 2018-10-21 12:57:56 +01:00
parent 9853018989
commit 93612d8773
1 changed files with 70 additions and 58 deletions
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128
lib/kernel/kernel.c
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@ -36,22 +36,6 @@
#include <villas/config.h>
#include <villas/kernel/kernel.h>
int kernel_get_cacheline_size()
{
#if defined(__linux__) && defined(__x86_64__)
return sysconf(_SC_LEVEL1_ICACHE_LINESIZE);
#else
return 64; /** @todo fixme */
#endif
}
#if defined(__linux__) || defined(__APPLE__)
int kernel_get_page_size()
{
return sysconf(_SC_PAGESIZE);
}
#endif
#ifdef __linux__
int kernel_module_set_param(const char *module, const char *param, const char *value)
@ -121,19 +105,6 @@ int kernel_module_loaded(const char *module)
return ret;
}
int kernel_get_version(struct version *v)
{
struct utsname uts;
if (uname(&uts) < 0)
return -1;
if (version_parse(uts.release, v))
return -1;
return 0;
}
int kernel_get_cmdline_param(const char *param, char *buf, size_t len)
{
int ret;
@ -172,35 +143,6 @@ out:
return -1; /* not found or error */
}
/* There is no sysconf interface to get the hugepage size */
int kernel_get_hugepage_size()
{
char *key, *value, *unit, *line = NULL;
int sz = -1;
size_t len = 0;
FILE *f;
f = fopen(PROCFS_PATH "/meminfo", "r");
if (!f)
return -1;
while (getline(&line, &len, f) != -1) {
key = strtok(line, ": ");
value = strtok(NULL, " ");
unit = strtok(NULL, "\n");
if (!strcmp(key, "Hugepagesize") && !strcmp(unit, "kB")) {
sz = strtoul(value, NULL, 10) * 1024;
break;
}
}
free(line);
fclose(f);
return sz;
}
int kernel_get_nr_hugepages()
{
FILE *f;
@ -343,3 +285,73 @@ out: fclose(f);
return ret;
}
#endif /* __linux__ */
int kernel_get_version(struct version *v)
{
struct utsname uts;
if (uname(&uts) < 0)
return -1;
if (version_parse(uts.release, v))
return -1;
return 0;
}
int kernel_get_cacheline_size()
{
#if defined(__linux__) && defined(__x86_64__)
return sysconf(_SC_LEVEL1_ICACHE_LINESIZE);
#elif defined(__x86_64__) || defined(__i386__)
return 64; /** @todo fixme */
#else
#error "Unsupported architecture"
#endif
}
#if defined(__linux__) || defined(__APPLE__)
int kernel_get_page_size()
{
return sysconf(_SC_PAGESIZE);
}
#else
#error "Unsupported platform"
#endif
/* There is no sysconf interface to get the hugepage size */
int kernel_get_hugepage_size()
{
#ifdef __linux__
char *key, *value, *unit, *line = NULL;
int sz = -1;
size_t len = 0;
FILE *f;
f = fopen(PROCFS_PATH "/meminfo", "r");
if (!f)
return -1;
while (getline(&line, &len, f) != -1) {
key = strtok(line, ": ");
value = strtok(NULL, " ");
unit = strtok(NULL, "\n");
if (!strcmp(key, "Hugepagesize") && !strcmp(unit, "kB")) {
sz = strtoul(value, NULL, 10) * 1024;
break;
}
}
free(line);
fclose(f);
return sz;
#elif defined(__x86_64__)
return 1 << 21;
#elif defined(__i386__)
return 1 << 22;
#else
#error "Unsupported architecture"
#endif
}