odp_shm_reserve() relays on huge page size to round up
requested size. If 1 Gb pages present than parser takes
it first as first alphabetical file name in sysfs. That
lead to issue where all allocations wants 1 GB HP. This
patch takes system default huge pages which are usually 2Mb,
and has to be enough for existence odp example apps and
validation tests.
Reported-by: B.Nousilal <bnousi...@gmail.com>
Signed-off-by: Maxim Uvarov <maxim.uva...@linaro.org>
---
platform/linux-generic/odp_system_info.c | 46 +++++++++++++-------------------
1 file changed, 18 insertions(+), 28 deletions(-)
diff --git a/platform/linux-generic/odp_system_info.c
b/platform/linux-generic/odp_system_info.c
index 0f1f3c7..14244c3 100644
--- a/platform/linux-generic/odp_system_info.c
+++ b/platform/linux-generic/odp_system_info.c
@@ -24,12 +24,9 @@
#include <sys/types.h>
#include <dirent.h>
-
#define CACHE_LNSZ_FILE \
"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
-#define HUGE_PAGE_DIR "/sys/kernel/mm/hugepages"
-
/*
* Report the number of logical CPUs detected at boot time
*/
@@ -77,37 +74,30 @@ static int systemcpu_cache_line_size(void)
#endif
-static int huge_page_size(void)
+static int default_huge_page_size(void)
{
- DIR *dir;
- struct dirent *dirent;
- int size = 0;
+ char str[1024];
+ char *pos;
+ uint64_t sz;
+ FILE *file;
- dir = opendir(HUGE_PAGE_DIR);
- if (dir == NULL) {
- ODP_ERR("%s not found\n", HUGE_PAGE_DIR);
- return 0;
- }
-
- while ((dirent = readdir(dir)) != NULL) {
- int temp = 0;
-
- if (sscanf(dirent->d_name, "hugepages-%i", &temp) != 1)
- continue;
-
- if (temp > size)
- size = temp;
- }
+ file = fopen("/proc/meminfo", "rt");
- if (closedir(dir)) {
- ODP_ERR("closedir failed\n");
- return 0;
+ while (fgets(str, sizeof(str), file) != NULL) {
+ pos = strstr(str, "Hugepagesize:");
+ if (pos) {
+ *(pos - 1) = '\0';
+ if (sscanf(pos, "@ %ld kB", &sz) == 1) {
+ fclose(file);
+ return sz * 1024;
+ }
+ }
}
- return size * 1024;
+ fclose(file);
+ return 0;
}
-
/*
* Analysis of /sys/devices/system/cpu/ files
*/
@@ -137,7 +127,7 @@ static int systemcpu(odp_system_info_t *sysinfo)
return -1;
}
- sysinfo->huge_page_size = huge_page_size();
+ sysinfo->huge_page_size = default_huge_page_size();
return 0;
}
--
2.7.1.250.gff4ea60
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