----- Original Message -----
> From: "Zhouping Liu" <[email protected]>
> To: "LTP List" <[email protected]>
> Sent: Friday, 15 March, 2013 4:03:08 PM
> Subject: [LTP] [PATCH v2 3/7] numa_helper: added a new function is_numa()
>
> Added a new function is_numa(), which is desinged to judge
> whether a system contains more than 1 available numa nodes
> or not, and lots of cases need it.
>
> Signed-off-by: Zhouping Liu <[email protected]>
> ---
> testcases/kernel/include/numa_helper.h | 1 +
> testcases/kernel/lib/numa_helper.c | 25
> +++++++++++++++++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/testcases/kernel/include/numa_helper.h
> b/testcases/kernel/include/numa_helper.h
> index 8e82d7b..251fd54 100644
> --- a/testcases/kernel/include/numa_helper.h
> +++ b/testcases/kernel/include/numa_helper.h
> @@ -34,5 +34,6 @@ unsigned long get_max_node(void);
> int get_allowed_nodes_arr(int flag, int *num_nodes, int **nodes);
> int get_allowed_nodes(int flag, int count, ...);
> void nh_dump_nodes();
> +int is_numa(void (*cleanup_fn)(void));
>
> #endif
> diff --git a/testcases/kernel/lib/numa_helper.c
> b/testcases/kernel/lib/numa_helper.c
> index 4ab8e3c..f9a4c3a 100644
> --- a/testcases/kernel/lib/numa_helper.c
> +++ b/testcases/kernel/lib/numa_helper.c
> @@ -265,3 +265,28 @@ void nh_dump_nodes()
> print_node_info(NH_CPUS);
> print_node_info(NH_MEMS | NH_CPUS);
> }
> +
> +/*
> + * is_numa - judge a system is NUMA system or not
> + * NOTE: the function is designed to try to find more than
> + * 1 available node, at least each node contains memory.
> + * WARN: Don't use this func in child, as it calls tst_brkm()
> + * RETURNS:
> + * 0 - it's not a NUMA system
> + * 1 - it's a NUMA system
> + */
> +int is_numa(void (*cleanup_fn)(void))
> +{
> + int ret;
> + int numa_nodes = 0;
> + int *nodes = NULL;
> +
> + ret = get_allowed_nodes_arr(NH_MEMS, &numa_nodes, &nodes);
If you don't need node ids, you can pass NULL:
ret = get_allowed_nodes_arr(NH_MEMS, &numa_nodes, NULL);
Otherwise you should free 'nodes' variable.
> + if (ret < 0)
> + tst_brkm(TBROK | TERRNO, cleanup_fn, "get_allowed_nodes_arr");
> +
> + if (numa_nodes > 1)
> + return 1;
> + else
> + return 0;
> +}
> --
> 1.7.11.7
>
>
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