Struct opendal::layers::DtraceLayer
source · pub struct DtraceLayer {}
Available on Linux and crate feature
layers-dtrace
only.Expand description
Support User Statically-Defined Tracing(aka USDT) on Linux
This layer is an experimental feature, it will be enabled by features = ["layers-dtrace"]
in Cargo.toml.
For now we have following probes:
§For Accessor
- ${operation}_start, arguments: path
- create_dir
- read
- write
- stat
- delete
- list
- presign
- blocking_create_dir
- blocking_read
- blocking_write
- blocking_stat
- blocking_delete
- blocking_list
- ${operation}_end, arguments: path
- create_dir
- read
- write
- stat
- delete
- list
- presign
- blocking_create_dir
- blocking_read
- blocking_write
- blocking_stat
- blocking_delete
- blocking_list
§For Reader
- reader_read_start, arguments: path
- reader_read_ok, arguments: path, length
- reader_read_error, arguments: path
§For BlockingReader
- blocking_reader_read_start, arguments: path
- blocking_reader_read_ok, arguments: path, length
- blocking_reader_read_error, arguments: path
§For Writer
- writer_write_start, arguments: path
- writer_write_ok, arguments: path, length
- writer_write_error, arguments: path
- writer_abort_start, arguments: path
- writer_abort_ok, arguments: path
- writer_abort_error, arguments: path
- writer_close_start, arguments: path
- writer_close_ok, arguments: path
- writer_close_error, arguments: path
§For BlockingWriter
- blocking_writer_write_start, arguments: path
- blocking_writer_write_ok, arguments: path, length
- blocking_writer_write_error, arguments: path
- blocking_writer_close_start, arguments: path
- blocking_writer_close_ok, arguments: path
- blocking_writer_close_error, arguments: path
Example:
// `Accessor` provides the low level APIs, we will use `Operator` normally.
let op: Operator = Operator::new(services::Fs::default().root("/tmp"))?
.layer(DtraceLayer::default())
.finish();
let path = "/tmp/test.txt";
for _ in 1..100000 {
let bs = vec![0; 64 * 1024 * 1024];
op.write(path, bs).await?;
op.read(path).await?;
}
Ok(())
Then you can use readelf -n target/debug/examples/dtrace
to see the probes:
Displaying notes found in: .note.stapsdt
Owner Data size Description
stapsdt 0x00000039 NT_STAPSDT (SystemTap probe descriptors)
Provider: opendal
Name: create_dir_start
Location: 0x00000000000f8f05, Base: 0x0000000000000000, Semaphore: 0x00000000003649f8
Arguments: -8@%rax
stapsdt 0x00000037 NT_STAPSDT (SystemTap probe descriptors)
Provider: opendal
Name: create_dir_end
Location: 0x00000000000f9284, Base: 0x0000000000000000, Semaphore: 0x00000000003649fa
Arguments: -8@%rax
stapsdt 0x0000003c NT_STAPSDT (SystemTap probe descriptors)
Provider: opendal
Name: blocking_list_start
Location: 0x00000000000f9487, Base: 0x0000000000000000, Semaphore: 0x0000000000364a28
Arguments: -8@%rax
stapsdt 0x0000003a NT_STAPSDT (SystemTap probe descriptors)
Provider: opendal
Name: blocking_list_end
Location: 0x00000000000f9546, Base: 0x0000000000000000, Semaphore: 0x0000000000364a2a
Arguments: -8@%rax
stapsdt 0x0000003c NT_STAPSDT (SystemTap probe descriptors)
Trait Implementations§
source§impl Clone for DtraceLayer
impl Clone for DtraceLayer
source§fn clone(&self) -> DtraceLayer
fn clone(&self) -> DtraceLayer
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for DtraceLayer
impl Debug for DtraceLayer
source§impl Default for DtraceLayer
impl Default for DtraceLayer
source§fn default() -> DtraceLayer
fn default() -> DtraceLayer
Returns the “default value” for a type. Read more
source§impl<A: Access> Layer<A> for DtraceLayer
impl<A: Access> Layer<A> for DtraceLayer
§type LayeredAccess = DTraceAccessor<A>
type LayeredAccess = DTraceAccessor<A>
The layered accessor that returned by this layer.
source§fn layer(&self, inner: A) -> Self::LayeredAccess
fn layer(&self, inner: A) -> Self::LayeredAccess
Intercept the operations on the underlying storage.
Auto Trait Implementations§
impl Freeze for DtraceLayer
impl RefUnwindSafe for DtraceLayer
impl Send for DtraceLayer
impl Sync for DtraceLayer
impl Unpin for DtraceLayer
impl UnwindSafe for DtraceLayer
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