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dpdk/init - Add compatibility to non numa architecture

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On non numa aware platforms, the path "/sys/devices/system/node/node%u"
does not exist: the "free_hugepages" count is available in "/sys/kernel/mm/".

Change-Id: Id62018a2bd0937d267663699c620e89d02c26a72
Signed-off-by: Christophe Fontaine <christophe.fontaine@qosmos.com>
This commit is contained in:
Christophe Fontaine
2016-05-13 07:14:08 +00:00
committed by Damjan Marion
parent 2df2e999fb
commit 144a90f2e1
1 changed files with 25 additions and 4 deletions
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29
vnet/vnet/devices/dpdk/init.c
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@ -1022,15 +1022,34 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
{
u32 pages_avail, page_size, mem;
u8 *s = 0;
char * path = "/sys/devices/system/node/node%u/hugepages/"
"hugepages-%ukB/free_hugepages%c";
u8 *p = 0;
char * numa_path = "/sys/devices/system/node/node%u/";
char * nonnuma_path = "/sys/kernel/mm/";
char * suffix = "hugepages/hugepages-%ukB/free_hugepages%c";
char * path = NULL;
struct stat sb_numa, sb_nonnuma;
p = format(p, numa_path, c);
stat(numa_path, &sb_numa);
stat(nonnuma_path, &sb_nonnuma);
if (S_ISDIR(sb_numa.st_mode)) {
path = (char*)format((u8*)path, "%s%s", p, suffix);
} else if (S_ISDIR(sb_nonnuma.st_mode)) {
path = (char*)format((u8*)path, "%s%s", nonnuma_path, suffix);
} else {
use_1g = 0;
use_2m = 0;
vec_free(p);
break;
}
vec_validate(mem_by_socket, c);
mem = mem_by_socket[c];
page_size = 1024;
pages_avail = 0;
s = format (s, path, c, page_size * 1024, 0);
s = format (s, path, page_size * 1024, 0);
read_sys_fs ((char *) s, "%u", &pages_avail);
vec_reset_length (s);
@ -1039,7 +1058,7 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
page_size = 2;
pages_avail = 0;
s = format (s, path, c, page_size * 1024, 0);
s = format (s, path, page_size * 1024, 0);
read_sys_fs ((char *) s, "%u", &pages_avail);
vec_reset_length (s);
@ -1047,6 +1066,8 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
use_2m = 0;
vec_free(s);
vec_free(p);
vec_free(path);
}));
_vec_len (mem_by_socket) = c + 1;