README
¶
ndn-dpdk/app/hrlog
This package implements a high resolution logger for per-packet tracing.
Activation
User should invoke NewWriter function or GraphQL createHrlogWriter mutation to start collecting log entries to a file, and invoke writer.Close function or GraphQL delete mutation to stop.
Only one collection can run at any moment.
Log entries posted when collection is not running are lost.
Log File Format
The log file starts with a 16-byte header, followed by 8-byte entries.
The header has three fields:
- 32-bit magic number 0x35f0498a, written in native endianness. If this number appears endian-swapped, the reader shall swap all other multi-byte numbers.
- 32-bit version number. See
entry.h. This is incremented whenever action types have a backwards incompatible change. - 64-bit TSCHZ. This is "1 second" represented in TSC duration unit.
Each entry has three fields:
- 48-bit value. If this is a duration, it is in TSC unit.
- 8-bit lcore id.
- 8-bit action type. See
entry.h.
Documentation
¶
Overview ¶
Package hrlog writes high resolution tracing logs.
Index ¶
Constants ¶
const Role = "HRLOG"
Role is writer thread role name.
Variables ¶
var ( ErrDisabled = errors.New("hrlog module disabled") ErrQueueFull = errors.New("too many pending tasks") ErrWriter = errors.New("writer failed") )
Error conditions.
var ( // GqlLCore is the LCore used for writer created via GraphQL. GqlLCore eal.LCore )
var (
GqlWriterType *gqlserver.NodeType[*Writer]
)
GraphQL types.
Functions ¶
Types ¶
type Writer ¶
type Writer struct {
ealthread.ThreadWithCtrl
// contains filtered or unexported fields
}
Writer is a hrlog writer thread.
var TheWriter *Writer
TheWriter is the current Writer instance.
func NewWriter ¶
func NewWriter(cfg WriterConfig) (w *Writer, e error)
NewWriter creates a hrlog writer thread.
func (Writer) ThreadRole ¶
ThreadRole implements ealthread.ThreadWithRole interface.
type WriterConfig ¶
type WriterConfig struct {
Filename string
Count int
RingCapacity int
Socket eal.NumaSocket
}
WriterConfig contains writer configuration.
Source Files
Directories
¶
| Path | Synopsis |
|---|---|
|
Package hrlogreader reads high resolution tracing logs.
|
Package hrlogreader reads high resolution tracing logs. |