CI: fix runtime codecov (#356)

* fix runtime ci

* update readme

* fix which not found

* fix

* fix

.github/workflows/test-runtime.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Install lcov
       if: "matrix.container == 'ubuntu-2204'"
       run: |
-        apt-get install -y lcov libzstd-dev libboost-all-dev
+        apt-get install -y lcov libzstd-dev libboost-all-dev gpg
     - name: Install lcov
       if: "matrix.container == 'fedora-39'"
       run: |
@@ -51,18 +51,13 @@ jobs:
         lcov --capture --directory . --output-file coverage-runtime.info
         lcov --remove coverage-runtime.info '/usr/*' --output-file coverage-runtime.info
         lcov --list coverage-runtime.info
-    - name: Generate runtime coverage
-      run: |
-        lcov --capture --directory . --output-file coverage-runtime.info --gcov-tool $(which gcov-12)
-        lcov --remove coverage-runtime.info '/usr/*' --output-file coverage-runtime.info
-        lcov --list coverage-runtime.info
-      - name: Upload runtime coverage
-        uses: actions/upload-artifact@v4
-        with:
-          name: coverage-runtime-${{matrix.container}}
-          include-hidden-files: false
-          path: |
-            ./coverage-runtime.info
+    - name: Upload runtime coverage
+      uses: actions/upload-artifact@v4
+      with:
+        name: coverage-runtime-${{matrix.container}}
+        include-hidden-files: false
+        path: |
+          ./coverage-runtime.info
 
     
     - name: build runtime with mpk enable

README.md

@@ -6,8 +6,6 @@
 
 `bpftime` is a High-Performance userspace eBPF runtime and General Extension Framework designed for userspace. It enables faster Uprobe, USDT, Syscall hooks, XDP, and more event sources by bypassing the kernel and utilizing an optimized compiler like `LLVM`.
 
-> ⚠️ **Note**: `bpftime` is actively under development, and it's not yet recommended for production use now. See our [roadmap](#roadmap) for details. We'd love to hear your feedback and suggestions! Please feel free to open an issue or [Contact us](#contact-and-citations).
-
 📦 [Key Features](#key-features) \
 🔨 [Quick Start](#quick-start) \
 🔌 [Examples & Use Cases](#examples--use-cases) \
@@ -19,6 +17,8 @@
 
 bpftime is not `userspace eBPF VM`, it's a userspace runtime framework includes everything to run eBPF in userspace: `loader`, `verifier`, `helpers`, `maps`, `ufunc` and multiple `events` such as Observability, Network, Policy or Access Control. It has multiple VM backend options support. For eBPF VM only, please see [llvmbpf](https://github.com/eunomia-bpf/llvmbpf).
 
+> ⚠️ **Note**: `bpftime` is currently under active development and may contain bugs or unstable API. Please use it with caution. For more details, check our [roadmap](#roadmap). We'd love to hear your feedback and suggestions! Feel free to open an issue or [Contact us](#contact-and-citations).
+
 ## Why bpftime? What's the design Goal?
 
 - **Performance Gains**: Achieve better performance by `bypassing the kernel` (e.g., via `Userspace DBI` or `Network Drivers`), with more configurable, optimized and more arch supported JIT/AOT options like `LLVM`, while maintaining compatibility with Linux kernel eBPF.
@@ -197,6 +197,7 @@ See [eunomia.dev/bpftime/documents/build-and-test](https://eunomia.dev/bpftime/d
 `bpftime` is continuously evolving with more features in the pipeline:
 
 - [ ] Keep compatibility with the evolving kernel
+- [ ] Refactor for General Extension Framework
 - [ ] Trying to refactor, bug fixing for `Production`.
 - [ ] More examples and usecases:
   - [X] Userspace Network Driver on userspace eBPF

benchmark/uprobe/uprobe.bpf.c

@@ -58,15 +58,20 @@ SEC("uprobe/benchmark/test:__bench_write")
 int BPF_UPROBE(__bench_write, char *a, int b, uint64_t c)
 {
 	char buffer[5] = "text";
-	bpf_probe_write_user(a, buffer, sizeof(buffer));
+    for (int i = 0; i < 1000; i++) {
+	    bpf_probe_write_user(a, buffer, sizeof(buffer));
+    }
 	return b + c;
 }
 
 SEC("uprobe/benchmark/test:__bench_read")
 int BPF_UPROBE(__bench_read, char *a, int b, uint64_t c)
 {
 	char buffer[5];
-	int res = bpf_probe_read_user(buffer, sizeof(buffer), a);
+    int res;
+    for (int i = 0; i < 1000; i++) {
+	    bpf_probe_read_user(buffer, sizeof(buffer), a);
+    }
 	return b + c + res + buffer[1];
 }