lkml.org 
[lkml]   [2017]   [Aug]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/2] perf/bench/numa: Handle discontiguous/sparse numa nodes
Date
From: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>

Certain systems are designed to have sparse/discontiguous nodes.
On such systems, perf bench numa hangs, shows wrong number of nodes
and shows values for non-existent nodes. Handle this by only
taking nodes that are exposed by kernel to userspace.

Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Balamuruhan S <bala24@linux.vnet.ibm.com>
---
tools/perf/bench/numa.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index 2483174..d4cccc4 100644
--- a/tools/perf/bench/numa.c
+++ b/tools/perf/bench/numa.c
@@ -287,12 +287,12 @@ static cpu_set_t bind_to_cpu(int target_cpu)

static cpu_set_t bind_to_node(int target_node)
{
- int cpus_per_node = g->p.nr_cpus/g->p.nr_nodes;
+ int cpus_per_node = g->p.nr_cpus/nr_numa_nodes();
cpu_set_t orig_mask, mask;
int cpu;
int ret;

- BUG_ON(cpus_per_node*g->p.nr_nodes != g->p.nr_cpus);
+ BUG_ON(cpus_per_node*nr_numa_nodes() != g->p.nr_cpus);
BUG_ON(!cpus_per_node);

ret = sched_getaffinity(0, sizeof(orig_mask), &orig_mask);
@@ -692,7 +692,7 @@ static int parse_setup_node_list(void)
int i;

for (i = 0; i < mul; i++) {
- if (t >= g->p.nr_tasks) {
+ if (t >= g->p.nr_tasks || !node_has_cpus(bind_node)) {
printf("\n# NOTE: ignoring bind NODEs starting at NODE#%d\n", bind_node);
goto out;
}
@@ -973,6 +973,7 @@ static void calc_convergence(double runtime_ns_max, double *convergence)
int node;
int cpu;
int t;
+ int processes;

if (!g->p.show_convergence && !g->p.measure_convergence)
return;
@@ -1007,13 +1008,14 @@ static void calc_convergence(double runtime_ns_max, double *convergence)
sum = 0;

for (node = 0; node < g->p.nr_nodes; node++) {
+ if (!is_node_present(node))
+ continue;
nr = nodes[node];
nr_min = min(nr, nr_min);
nr_max = max(nr, nr_max);
sum += nr;
}
BUG_ON(nr_min > nr_max);
-
BUG_ON(sum > g->p.nr_tasks);

if (0 && (sum < g->p.nr_tasks))
@@ -1027,8 +1029,9 @@ static void calc_convergence(double runtime_ns_max, double *convergence)
process_groups = 0;

for (node = 0; node < g->p.nr_nodes; node++) {
- int processes = count_node_processes(node);
-
+ if (!is_node_present(node))
+ continue;
+ processes = count_node_processes(node);
nr = nodes[node];
tprintf(" %2d/%-2d", nr, processes);

@@ -1334,7 +1337,7 @@ static void print_summary(void)

printf("\n ###\n");
printf(" # %d %s will execute (on %d nodes, %d CPUs):\n",
- g->p.nr_tasks, g->p.nr_tasks == 1 ? "task" : "tasks", g->p.nr_nodes, g->p.nr_cpus);
+ g->p.nr_tasks, g->p.nr_tasks == 1 ? "task" : "tasks", nr_numa_nodes(), g->p.nr_cpus);
printf(" # %5dx %5ldMB global shared mem operations\n",
g->p.nr_loops, g->p.bytes_global/1024/1024);
printf(" # %5dx %5ldMB process shared mem operations\n",
--
2.7.4
\
 
 \ /
  Last update: 2017-08-21 12:18    [W:0.144 / U:1.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site