64 lines
2.3 KiB
Bash
Executable File
64 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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# C1 + C2 + C6 instrumentation: per-codec decode with strace (ioctl) + lsof (fds) + dmesg before/after.
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# Decodes 30 frames into a tmp file to verify HW engagement; doesn't measure FPS.
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set -u
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OUT=$HOME/measurements/p3
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mkdir -p $OUT
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codecs=("h264:rkvdec:h264.mp4" "vp8:hantro:vp8.webm" "mpeg2:hantro:mpeg2.ts")
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# C6 pre: dmesg snapshot
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sudo dmesg --time-format=ctime > $OUT/dmesg.pre.txt
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for spec in "${codecs[@]}"; do
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codec=${spec%%:*}; route=$(echo $spec | cut -d: -f2); ext=${spec##*:}
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cf=$HOME/measurements/encoded/bbb_60s_720p.${ext}
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log=$OUT/engage_${codec}
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rm -f $log.{strace,lsof,stderr,nv12} 2>/dev/null
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echo "=== $codec ($route) ===" | tee $log.summary
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# Launch in background, track PID; lsof+strace alongside
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LIBVA_DRIVER_NAME=v4l2_request strace -ff -o $log.strace -e trace=ioctl,openat \
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ffmpeg -hide_banner -loglevel error \
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-hwaccel vaapi -hwaccel_output_format vaapi \
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-i "$cf" -vf "hwdownload,format=nv12" -frames:v 30 \
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-f rawvideo -pix_fmt nv12 -y $log.nv12 \
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> $log.stderr 2>&1 &
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pid=$!
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# Wait briefly then lsof
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sleep 0.6
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if kill -0 $pid 2>/dev/null; then
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lsof -p $pid 2>/dev/null | grep -E "/dev/(video|media|dri)" > $log.lsof
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fi
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wait $pid; rc=$?
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# Aggregate
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size=$(stat -c%s $log.nv12 2>/dev/null || echo 0)
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expected=$((30 * 1280 * 720 * 3 / 2)) # 30 frames yuv420p 720p
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size_ok=$([ "$size" = "$expected" ] && echo "ok" || echo "MISMATCH (expected=$expected)")
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vidioc=$(grep -h "VIDIOC_S_EXT_CTRLS\|VIDIOC_QUERYCAP\|VIDIOC_QBUF\|VIDIOC_DQBUF" $log.strace.* 2>/dev/null | wc -l)
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media_q=$(grep -h "MEDIA_REQUEST_IOC_QUEUE\|MEDIA_REQUEST_IOC_REINIT" $log.strace.* 2>/dev/null | wc -l)
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fd_count=$(wc -l < $log.lsof 2>/dev/null || echo 0)
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{
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echo " rc=$rc size=$size size_ok=$size_ok"
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echo " ioctl V4L2 (S_EXT_CTRLS+Q/DQBUF+QUERYCAP)=$vidioc"
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echo " ioctl MEDIA_REQUEST_*=$media_q"
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echo " open V4L2/media/DRI fds=$fd_count"
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if [ -s $log.lsof ]; then
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echo " fds:"
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awk '{print " " $9}' $log.lsof | sort -u
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fi
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} | tee -a $log.summary
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done
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# C6 post
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sudo dmesg --time-format=ctime > $OUT/dmesg.post.txt
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echo
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echo "=== dmesg diff (new lines since pre) ==="
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diff $OUT/dmesg.pre.txt $OUT/dmesg.post.txt | head -20
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echo "=== done $(date -Iseconds) ==="
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