michael/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

perf stat bperf cgroup: Increase MAX_EVENTS from 32 to 1024

Browse Source 
The MAX_EVENTS value ensured a counted loop presumably to satisfy the
BPF verifier. It is possible to go past 32 events when gathering
uncore events. Increase the amount to 1024 as that should provide some
amount of headroom.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers
2025-10-16 08:07:18 -07:00
committed by Namhyung Kim
parent 98f3e85c47
commit b8308511f6
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/bpf_skel/bperf_cgroup.bpf.c
View File

@@ -7,7 +7,7 @@
#include <bpf/bpf_core_read.h>
#define MAX_LEVELS 10 // max cgroup hierarchy level: arbitrary
#define MAX_EVENTS 32 // max events per cgroup: arbitrary
#define MAX_EVENTS 1024 // max events per cgroup: arbitrary
// NOTE: many of map and global data will be modified before loading
// from the userspace (perf tool) using the skeleton helpers.