diff options
| author | SeongJae Park <sj@kernel.org> | 2024-12-10 13:50:28 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-01-13 22:40:57 -0800 |
| commit | 65cc56d02d3a59d1c96cf159c4cd12b5afe3b6a8 (patch) | |
| tree | 71c5b4688b6598ee36df217d2d29dfb1cf7adb62 /samples | |
| parent | b757c6cfc696d43501632861f731412b14a7be86 (diff) | |
samples/damon/wsse: implement working set size estimation and logging
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@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/damon/wsse.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/samples/damon/wsse.c b/samples/damon/wsse.c index 2ba0c91baad9..11be25803274 100644 --- a/samples/damon/wsse.c +++ b/samples/damon/wsse.c @@ -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); } |