From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- tools/perf/util/spark.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tools/perf/util/spark.c (limited to 'tools/perf/util/spark.c') diff --git a/tools/perf/util/spark.c b/tools/perf/util/spark.c new file mode 100644 index 000000000..65ca253cc --- /dev/null +++ b/tools/perf/util/spark.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "spark.h" +#include +#include + +#define SPARK_SHIFT 8 + +/* Print spark lines on outf for numval values in val. */ +int print_spark(char *bf, int size, unsigned long *val, int numval) +{ + static const char *ticks[NUM_SPARKS] = { + "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" + }; + int i, printed = 0; + unsigned long min = ULONG_MAX, max = 0, f; + + for (i = 0; i < numval; i++) { + if (val[i] < min) + min = val[i]; + if (val[i] > max) + max = val[i]; + } + f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1); + if (f < 1) + f = 1; + for (i = 0; i < numval; i++) { + printed += scnprintf(bf + printed, size - printed, "%s", + ticks[((val[i] - min) << SPARK_SHIFT) / f]); + } + + return printed; +} -- cgit v1.3.1