Flame Graph - 標籤 - Yan-Hao Wang's Blog https://kola.ink/tags/flame-graph/ Flame Graph - 標籤 - Yan-Hao Wang's Blog Hugo -- gohugo.iozh-TWbses30074@gmail.com (Yan-Hao Wang) bses30074@gmail.com (Yan-Hao Wang)This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Mon, 22 Jun 2026 19:54:12 +0800 Tmp: FreeBSD DTrace 產生 Flame Graph https://kola.ink/dtrace-flame-graph/ Mon, 22 Jun 2026 19:54:12 +0800 bses30074@gmail.com (Yan-Hao Wang) https://kola.ink/dtrace-flame-graph/ 可以看到有 profile-97, profile-199 … profile-4999 還有 tick-1 … tick-5000，前者是 CPU sampling profiler（基於 interrupt / PMC / sampling），後者是 scheduler tick / timer interrupt sampling 適合 long-run performance trend。

kola@:~/proj/mac_casper/test/performance/syscall/sysctl $ sudo dtrace \
-x stackframes=100 \
-o stacks.out \
-c ./perf_baseline \
-n '
profile-4999
/pid == $target/
{
    @[stack()] = count();
}'

kola@:~/proj/mac_casper/test/performance/syscall/sysctl $ perl ~/proj/FlameGraph/stackcollapse.pl stacks.out > folded.out

kola@:~/proj/mac_casper/test/performance/syscall/sysctl $ perl ~/proj/FlameGraph/flamegraph.pl \
    --title="sysctl kernel stack with mac" \
    folded.out > flame.svg

實際例子

存成 SVG 後你就可以在瀏覽器打開，可以自由跟它互動像是看到全名等。

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