Simplify glibc heapprofd instructions.
Change-Id: I4a3eb76338eecfe00afb8b5dfab1b54969cf7983
diff --git a/docs/data-sources/native-heap-profiler.md b/docs/data-sources/native-heap-profiler.md
index 5b605ee..1f5375e 100644
--- a/docs/data-sources/native-heap-profiler.md
+++ b/docs/data-sources/native-heap-profiler.md
@@ -392,7 +392,8 @@
NOTE: This is experimental and only for ad-hoc investigations.
You can use a standalone library to profile memory allocations on Linux.
-First [build Perfetto](/docs/contributing/build-instructions.md)
+First [build Perfetto](/docs/contributing/build-instructions.md). You only need
+to do this once.
```
tools/build_all_configs.py
@@ -408,34 +409,10 @@
Start the profile (e.g. targeting trace_processor_shell)
```
+tools/heap_profile -n trace_processor_shell --print-config | \
out/linux_clang_release/perfetto \
-c - --txt \
- -o ~/heapprofd-trace \
-<<EOF
-
-buffers {
- size_kb: 32768
-}
-
-data_sources {
- config {
- name: "android.heapprofd"
- heapprofd_config {
- shmem_size_bytes: 8388608
- sampling_interval_bytes: 4096
- block_client: true
- process_cmdline: "trace_processor_shell"
- dump_at_max: true
- }
- }
-}
-
-duration_ms: 604800000
-write_into_file: true
-flush_timeout_ms: 30000
-flush_period_ms: 604800000
-
-EOF
+ -o ~/heapprofd-trace
```
Finally, run your target (e.g. trace_processor_shell) with LD_PRELOAD
