The patch titled
Subject: samples/damon/wsse: implement working set size estimation and logging
has been added to the -mm mm-unstable branch. Its filename is
samples-damon-wsse-implement-working-set-size-estimation-and-logging.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/samples-damon-wsse-implement-working-set-size-estimation-and-logging.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: samples/damon/wsse: implement working set size estimation and logging
Date: Tue, 10 Dec 2024 13:50:28 -0800
Implement the DAMON-based working set size estimation logic. The logic
iterates memory regions in DAMON-generated access pattern snapshot for
every aggregation interval 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 reported to the user by printing it to the kernel log.
Link: https://lkml.kernel.org/r/20241210215030.85675-4-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
samples/damon/wsse.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
--- a/samples/damon/wsse.c~samples-damon-wsse-implement-working-set-size-estimation-and-logging
+++ a/samples/damon/wsse.c
@@ -30,6 +30,23 @@ MODULE_PARM_DESC(enable, "Enable or disa
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);
}
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
samples-add-a-skeleton-of-a-sample-damon-module-for-working-set-size-estimation.patch
samples-damon-wsse-start-and-stop-damon-as-the-user-requests.patch
samples-damon-wsse-implement-working-set-size-estimation-and-logging.patch
samples-damon-introduce-a-skeleton-of-a-smaple-damon-module-for-proactive-reclamation.patch
samples-damon-prcl-implement-schemes-setup.patch
