Commit b5b82824 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Peter Zijlstra
Browse files

rseq: Add statistics for time slice extensions 



Extend the quick statistics with time slice specific fields.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251215155708.795202254@linutronix.de
parent f8380f97

include/linux/rseq_entry.h

+5 −0
Original line number Diff line number Diff line
@@ -15,6 +15,11 @@ struct rseq_stats { 
	unsigned long	cs;

	unsigned long	clear;

	unsigned long	fixup;

	unsigned long	s_granted;

	unsigned long	s_expired;

	unsigned long	s_revoked;

	unsigned long	s_yielded;

	unsigned long	s_aborted;

};



DECLARE_PER_CPU(struct rseq_stats, rseq_stats);

kernel/rseq.c

+14 −0
Original line number Diff line number Diff line
@@ -138,6 +138,13 @@ static int rseq_stats_show(struct seq_file *m, void *p) 
		stats.cs	+= data_race(per_cpu(rseq_stats.cs, cpu));

		stats.clear	+= data_race(per_cpu(rseq_stats.clear, cpu));

		stats.fixup	+= data_race(per_cpu(rseq_stats.fixup, cpu));

		if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) {

			stats.s_granted	+= data_race(per_cpu(rseq_stats.s_granted, cpu));

			stats.s_expired	+= data_race(per_cpu(rseq_stats.s_expired, cpu));

			stats.s_revoked	+= data_race(per_cpu(rseq_stats.s_revoked, cpu));

			stats.s_yielded	+= data_race(per_cpu(rseq_stats.s_yielded, cpu));

			stats.s_aborted	+= data_race(per_cpu(rseq_stats.s_aborted, cpu));

		}

	}



	seq_printf(m, "exit:   %16lu\n", stats.exit);
@@ -148,6 +155,13 @@ static int rseq_stats_show(struct seq_file *m, void *p) 
	seq_printf(m, "cs:     %16lu\n", stats.cs);

	seq_printf(m, "clear:  %16lu\n", stats.clear);

	seq_printf(m, "fixup:  %16lu\n", stats.fixup);

	if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) {

		seq_printf(m, "sgrant: %16lu\n", stats.s_granted);

		seq_printf(m, "sexpir: %16lu\n", stats.s_expired);

		seq_printf(m, "srevok: %16lu\n", stats.s_revoked);

		seq_printf(m, "syield: %16lu\n", stats.s_yielded);

		seq_printf(m, "sabort: %16lu\n", stats.s_aborted);

	}

	return 0;

}