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⚡ Bolt: Optimize L7 event deserialization #164

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⚡ Bolt: Optimize L7 event deserialization #164

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5 changes: 5 additions & 0 deletions .jules/bolt.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
# Bolt's Journal

## 2024-05-24 - [Initial Setup]
**Learning:** Initialized Bolt's journal.
**Action:** Always check this file before starting.
13 changes: 8 additions & 5 deletions ebpftracer/tracer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import (
"fmt"
"io"
"os"
"unsafe"
"path"
"runtime"
"strconv"
Expand Down Expand Up @@ -432,13 +433,15 @@ func runEventsReader(name string, r *perf.Reader, ch chan<- Event, typ perfMapTy

switch typ {
case perfMapTypeL7Events:
v := &l7Event{}
data := rec.RawSample

if err := binary.Read(bytes.NewBuffer(data), binary.LittleEndian, v); err != nil {
klog.Warningln("failed to read l7 event:", err)
// OPTIMIZATION: Use unsafe pointer cast instead of binary.Read to avoid
// expensive reflection and memory allocation.
// The l7Event struct matches the C-struct layout (including padding).
// We verify the size to ensure memory safety.
if len(rec.RawSample) < int(unsafe.Sizeof(l7Event{})) {
klog.Warningln("l7 event too small:", len(rec.RawSample))
continue
}
v := (*l7Event)(unsafe.Pointer(&rec.RawSample[0]))

// Extract payload data directly from the struct arrays
payloadSize := min(int(v.PayloadSize), len(v.Payload))
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