Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# DRM PMU
3# SPDX-License-Identifier: GPL-2.0
4
5set -e
6
7output=$(mktemp /tmp/perf.drm_pmu.XXXXXX.txt)
8
9cleanup() {
10 rm -f "${output}"
11
12 trap - EXIT TERM INT
13}
14
15trap_cleanup() {
16 echo "Unexpected signal in ${FUNCNAME[1]}"
17 cleanup
18 exit 1
19}
20trap trap_cleanup EXIT TERM INT
21
22# Array to store file descriptors and device names
23declare -A device_fds
24
25# Open all devices and store file descriptors. Opening the device will create a
26# /proc/$$/fdinfo file containing the DRM statistics.
27fd_count=3 # Start with file descriptor 3
28for device in /dev/dri/*
29do
30 if [[ ! -c "$device" ]]
31 then
32 continue
33 fi
34 major=$(stat -c "%Hr" "$device")
35 if [[ "$major" != 226 ]]
36 then
37 continue
38 fi
39 echo "Opening $device"
40 eval "exec $fd_count<\"$device\""
41 echo "fdinfo for: $device (FD: $fd_count)"
42 cat "/proc/$$/fdinfo/$fd_count"
43 echo
44 device_fds["$device"]="$fd_count"
45 fd_count=$((fd_count + 1))
46done
47
48if [[ ${#device_fds[@]} -eq 0 ]]
49then
50 echo "No DRM devices found [Skip]"
51 cleanup
52 exit 2
53fi
54
55# For each DRM event
56err=0
57for p in $(perf list --raw-dump drm-)
58do
59 echo -n "Testing perf stat of $p. "
60 perf stat -e "$p" --pid=$$ true > "$output" 2>&1
61 if ! grep -q "$p" "$output"
62 then
63 echo "Missing DRM event in: [Failed]"
64 cat "$output"
65 err=1
66 else
67 echo "[OK]"
68 fi
69done
70
71# Close all file descriptors
72for fd in "${device_fds[@]}"; do
73 eval "exec $fd<&-"
74done
75
76# Finished
77cleanup
78exit $err