@@ -30,6 +30,23 @@ MODULE_PARM_DESC(enable, "Enable or disable DAMON_SAMPLE_WSSE");
static struct damon_ctx *ctx;
static struct pid *target_pidp;
+static int damon_sample_wsse_after_aggregate(struct damon_ctx *c)
+{
+ struct damon_target *t;
+
+ damon_for_each_target(t, c) {
+ struct damon_region *r;
+ unsigned long wss = 0;
+
+ damon_for_each_region(r, t) {
+ if (r->nr_accesses > 0)
+ wss += r->ar.end - r->ar.start;
+ }
+ pr_info("wss: %lu\n", wss);
+ }
+ return 0;
+}
+
static int damon_sample_wsse_start(void)
{
struct damon_target *target;
@@ -57,6 +74,7 @@ static int damon_sample_wsse_start(void)
}
target->pid = target_pidp;
+ ctx->callback.after_aggregation = damon_sample_wsse_after_aggregate;
return damon_start(&ctx, 1, true);
}
Implement the DAMON-based working set size estimation logic. The logic simply iterates memory regions in DAMON-generated access pattern snapshot for every aggregation, and get the total sum of the size of any region having one or higher 'nr_accesses' count. That is, it assumes any region having one or higher 'nr_accesses' to be a part of the working set. The estimated value is printed to the kernel log. Signed-off-by: SeongJae Park <sj@kernel.org> --- samples/damon/wsse.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)