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| author | SeongJae Park <sj@kernel.org> | 2025-07-04 15:14:08 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-13 16:38:33 -0700 |
| commit | a86d695193bfab3f130f9275c275e4e143dcd2e3 (patch) | |
| tree | 3c607ceaa223ff64806ab26d1e62b8fd6872a989 /mm/damon | |
| parent | 214db70287277096e77d804284066ce1c07297dd (diff) | |
| download | linux-a86d695193bfab3f130f9275c275e4e143dcd2e3.tar.gz linux-a86d695193bfab3f130f9275c275e4e143dcd2e3.tar.bz2 linux-a86d695193bfab3f130f9275c275e4e143dcd2e3.zip | |
mm/damon: add trace event for effective size quota
Aim-oriented DAMOS quota auto-tuning is an important and recommended
feature for DAMOS users. Add a trace event for the observability of the
tuned quota and tuning itself.
[sj@kernel.org: initialize sidx in damos_trace_esz()]
Link: https://lkml.kernel.org/r/20250705172003.52324-1-sj@kernel.org
[sj@kernel.org: make damos_esz unconditional trace event]
Link: https://lkml.kernel.org/r/20250709182843.35812-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20250704221408.38510-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: kernel test robot <lkp@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon')
| -rw-r--r-- | mm/damon/core.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index 57a1ace4d10d..e8036254cc98 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -2011,12 +2011,26 @@ static void damos_set_effective_quota(struct damos_quota *quota) quota->esz = esz; } +static void damos_trace_esz(struct damon_ctx *c, struct damos *s, + struct damos_quota *quota) +{ + unsigned int cidx = 0, sidx = 0; + struct damos *siter; + + damon_for_each_scheme(siter, c) { + if (siter == s) + break; + sidx++; + } + trace_damos_esz(cidx, sidx, quota->esz); +} + static void damos_adjust_quota(struct damon_ctx *c, struct damos *s) { struct damos_quota *quota = &s->quota; struct damon_target *t; struct damon_region *r; - unsigned long cumulated_sz; + unsigned long cumulated_sz, cached_esz; unsigned int score, max_score = 0; if (!quota->ms && !quota->sz && list_empty("a->goals)) @@ -2030,7 +2044,11 @@ static void damos_adjust_quota(struct damon_ctx *c, struct damos *s) quota->total_charged_sz += quota->charged_sz; quota->charged_from = jiffies; quota->charged_sz = 0; + if (trace_damos_esz_enabled()) + cached_esz = quota->esz; damos_set_effective_quota(quota); + if (trace_damos_esz_enabled() && quota->esz != cached_esz) + damos_trace_esz(c, s, quota); } if (!c->ops.get_scheme_score) |