forked from M-Labs/artiq
remove profiler
This commit is contained in:
parent
e3edb505e3
commit
477b1516d3
@ -20,10 +20,6 @@ class Request(Enum):
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ConfigRemove = 14
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ConfigErase = 15
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StartProfiler = 9
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StopProfiler = 10
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GetProfile = 11
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Reboot = 5
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DebugAllocator = 8
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@ -38,8 +34,6 @@ class Reply(Enum):
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ConfigData = 7
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Profile = 5
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RebootImminent = 3
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@ -189,40 +183,6 @@ class CommMgmt:
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self._write_header(Request.ConfigErase)
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self._read_expect(Reply.Success)
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def start_profiler(self, interval, edges_size, hits_size):
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self._write_header(Request.StartProfiler)
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self._write_int32(interval)
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self._write_int32(edges_size)
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self._write_int32(hits_size)
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self._read_expect(Reply.Success)
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def stop_profiler(self):
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self._write_header(Request.StopProfiler)
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self._read_expect(Reply.Success)
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def stop_profiler(self):
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self._write_header(Request.StopProfiler)
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self._read_expect(Reply.Success)
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def get_profile(self):
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self._write_header(Request.GetProfile)
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self._read_expect(Reply.Profile)
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hits = {}
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for _ in range(self._read_int32()):
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addr = self._read_int32()
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count = self._read_int32()
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hits[addr] = count
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edges = {}
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for _ in range(self._read_int32()):
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caller = self._read_int32()
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callee = self._read_int32()
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count = self._read_int32()
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edges[(caller, callee)] = count
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return hits, edges
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def reboot(self):
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self._write_header(Request.Reboot)
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self._read_expect(Reply.RebootImminent)
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@ -1,92 +0,0 @@
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from collections import defaultdict
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import subprocess
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class Symbolizer:
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def __init__(self, binary, triple, demangle=True):
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cmdline = [
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triple + "-addr2line", "--exe=" + binary,
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"--addresses", "--functions", "--inlines"
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]
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if demangle:
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cmdline.append("--demangle=rust")
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self._addr2line = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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universal_newlines=True)
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def symbolize(self, addr):
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self._addr2line.stdin.write("0x{:08x}\n0\n".format(addr))
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self._addr2line.stdin.flush()
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self._addr2line.stdout.readline() # 0x[addr]
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result = []
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while True:
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function = self._addr2line.stdout.readline().rstrip()
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# check for end marker
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if function == "0x00000000": # 0x00000000
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self._addr2line.stdout.readline() # ??
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self._addr2line.stdout.readline() # ??:0
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return result
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file, line = self._addr2line.stdout.readline().rstrip().split(":")
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result.append((function, file, line, addr))
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class CallgrindWriter:
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def __init__(self, output, binary, triple, compression=True, demangle=True):
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self._output = output
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self._binary = binary
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self._current = defaultdict(lambda: None)
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self._ids = defaultdict(lambda: {})
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self._compression = compression
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self._symbolizer = Symbolizer(binary, triple, demangle=demangle)
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def _write(self, fmt, *args, **kwargs):
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self._output.write(fmt.format(*args, **kwargs))
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self._output.write("\n")
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def _spec(self, spec, value):
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if self._current[spec] == value:
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return
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self._current[spec] = value
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if not self._compression or value == "??":
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self._write("{}={}", spec, value)
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return
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spec_ids = self._ids[spec]
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if value in spec_ids:
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self._write("{}=({})", spec, spec_ids[value])
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else:
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spec_ids[value] = len(spec_ids) + 1
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self._write("{}=({}) {}", spec, spec_ids[value], value)
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def header(self):
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self._write("# callgrind format")
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self._write("version: 1")
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self._write("creator: ARTIQ")
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self._write("positions: instr line")
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self._write("events: Hits")
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self._write("")
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self._spec("ob", self._binary)
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self._spec("cob", self._binary)
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def hit(self, addr, count):
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for function, file, line, addr in self._symbolizer.symbolize(addr):
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self._spec("fl", file)
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self._spec("fn", function)
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self._write("0x{:08x} {} {}", addr, line, count)
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def edge(self, caller, callee, count):
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edges = self._symbolizer.symbolize(callee) + self._symbolizer.symbolize(caller)
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for (callee, caller) in zip(edges, edges[1:]):
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function, file, line, addr = callee
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self._spec("cfl", file)
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self._spec("cfn", function)
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self._write("calls={} 0x{:08x} {}", count, addr, line)
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function, file, line, addr = caller
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self._spec("fl", file)
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self._spec("fn", function)
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self._write("0x{:08x} {} {}", addr, line, count)
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@ -63,14 +63,6 @@ pub enum Request {
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ConfigRemove { key: String },
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ConfigErase,
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StartProfiler {
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interval_us: u32,
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hits_size: u32,
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edges_size: u32,
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},
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StopProfiler,
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GetProfile,
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Reboot,
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DebugAllocator,
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@ -129,14 +121,6 @@ impl Request {
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},
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15 => Request::ConfigErase,
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9 => Request::StartProfiler {
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interval_us: reader.read_u32()?,
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hits_size: reader.read_u32()?,
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edges_size: reader.read_u32()?,
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},
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10 => Request::StopProfiler,
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11 => Request::GetProfile,
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5 => Request::Reboot,
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8 => Request::DebugAllocator,
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@ -172,11 +156,6 @@ impl<'a> Reply<'a> {
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writer.write_bytes(bytes)?;
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},
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Reply::Profile => {
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writer.write_u8(5)?;
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// profile data follows
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}
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Reply::RebootImminent => {
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writer.write_u8(3)?;
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}
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@ -50,7 +50,6 @@ mod cache;
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mod rtio_dma;
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mod mgmt;
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mod profiler;
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mod kernel;
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mod kern_hwreq;
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mod session;
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@ -263,14 +262,7 @@ pub extern fn exception(vect: u32, _regs: *const u32, pc: u32, ea: u32) {
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let vect = irq::Exception::try_from(vect).expect("unknown exception");
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match vect {
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irq::Exception::Interrupt =>
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while irq::pending_mask() != 0 {
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match () {
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#[cfg(has_timer1)]
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() if irq::is_pending(csr::TIMER1_INTERRUPT) =>
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profiler::sample(pc as usize),
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_ => panic!("spurious irq {}", irq::pending_mask().trailing_zeros())
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}
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},
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panic!("spurious irq {}", irq::pending_mask().trailing_zeros())
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_ => {
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fn hexdump(addr: u32) {
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let addr = (addr - addr % 4) as *const u32;
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@ -5,7 +5,6 @@ use board_misoc::{config, spiflash};
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use logger_artiq::BufferLogger;
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use mgmt_proto::*;
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use sched::{Io, TcpListener, TcpStream, Error as SchedError};
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use profiler;
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impl From<SchedError> for Error<SchedError> {
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fn from(value: SchedError) -> Error<SchedError> {
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@ -103,53 +102,11 @@ fn worker(io: &Io, stream: &mut TcpStream) -> Result<(), Error<SchedError>> {
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}?;
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}
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Request::StartProfiler { interval_us, hits_size, edges_size } => {
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match profiler::start(interval_us as u64,
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hits_size as usize, edges_size as usize) {
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Ok(()) => Reply::Success.write_to(stream)?,
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Err(()) => Reply::Unavailable.write_to(stream)?
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}
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}
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Request::StopProfiler => {
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profiler::stop();
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Reply::Success.write_to(stream)?;
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}
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Request::GetProfile => {
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profiler::pause(|profile| {
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let profile = match profile {
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None => return Reply::Unavailable.write_to(stream),
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Some(profile) => profile
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};
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Reply::Profile.write_to(stream)?;
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{
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let hits = profile.hits();
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stream.write_u32(hits.len() as u32)?;
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for (&addr, &count) in hits.iter() {
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stream.write_u32(addr.as_raw() as u32)?;
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stream.write_u32(count)?;
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}
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}
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{
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let edges = profile.edges();
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stream.write_u32(edges.len() as u32)?;
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for (&(caller, callee), &count) in edges.iter() {
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stream.write_u32(caller.as_raw() as u32)?;
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stream.write_u32(callee.as_raw() as u32)?;
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stream.write_u32(count)?;
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}
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}
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Ok(())
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})?;
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}
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Request::Reboot => {
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Reply::RebootImminent.write_to(stream)?;
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stream.close()?;
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stream.flush()?;
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profiler::stop();
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warn!("restarting");
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unsafe { spiflash::reload(); }
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}
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@ -1,278 +0,0 @@
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#![cfg_attr(not(has_timer1), allow(dead_code))]
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use core::mem;
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use core::fmt;
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use core::num::NonZeroUsize;
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use alloc::Vec;
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use managed::ManagedMap;
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#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
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pub struct Address(NonZeroUsize);
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impl Address {
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pub fn new(raw: usize) -> Address {
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Address(NonZeroUsize::new(raw).expect("null address"))
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}
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pub fn as_raw(&self) -> usize {
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self.0.get()
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}
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}
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pub struct Profile {
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hits: Vec<Option<(Address, u32)>>,
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edges: Vec<Option<((Address, Address), u32)>>,
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}
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impl fmt::Debug for Profile {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "Profile {{ hits: vec![...; {}], edges: vec![...; {}] }}",
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self.hits.len(), self.edges.len())
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}
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}
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impl Profile {
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pub fn new(hits_size: usize, edges_size: usize) -> Profile {
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let mut hits = vec![None; hits_size];
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hits.shrink_to_fit();
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let mut edges = vec![None; edges_size];
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edges.shrink_to_fit();
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Profile {
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hits: hits.into(),
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edges: edges.into(),
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}
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}
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pub fn overhead(&self) -> usize {
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let hit_size = mem::size_of::<Option<(Address, u32)>>();
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let edge_size = mem::size_of::<Option<(Address, u32)>>();
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self.hits.capacity() * hit_size +
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self.edges.capacity() * edge_size
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}
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pub fn has_edges(&self) -> bool {
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self.edges.is_empty()
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}
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pub fn hits<'a>(&'a mut self) -> ManagedMap<'a, Address, u32> {
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ManagedMap::Borrowed(&mut self.hits[..])
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}
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pub fn edges<'a>(&'a mut self) -> ManagedMap<'a, (Address, Address), u32> {
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ManagedMap::Borrowed(&mut self.edges[..])
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}
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pub fn record_hit(&mut self, addr: Address) -> Result<(), ()> {
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let mut hits = self.hits();
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if let Some(count) = hits.get_mut(&addr) {
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return Ok(*count = count.saturating_add(1))
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}
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if let Err(_) = hits.insert(addr, 1) {
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return Err(())
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}
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return Ok(())
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}
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#[allow(dead_code)]
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pub fn record_edge(&mut self, caller: Address, callee: Address) -> Result<(), ()> {
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let mut edges = self.edges();
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if let Some(count) = edges.get_mut(&(caller, callee)) {
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return Ok(*count = count.saturating_add(1))
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}
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if let Err(_) = edges.insert((caller, callee), 1) {
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return Err(())
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}
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Ok(())
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}
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}
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#[cfg(has_timer1)]
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mod imp {
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use unwind_backtrace::backtrace;
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use board_misoc::{csr, irq};
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use super::{Address, Profile};
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static mut PROFILE: Option<Profile> = None;
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mod lock {
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use core::ops::{Deref, DerefMut};
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use core::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
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static LOCKED: AtomicUsize = ATOMIC_USIZE_INIT;
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pub struct Lock;
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impl Lock {
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pub fn take() -> Result<Lock, ()> {
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if LOCKED.swap(1, Ordering::SeqCst) != 0 {
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Err(())
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} else {
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Ok(Lock)
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}
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}
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}
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impl Deref for Lock {
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type Target = Option<super::Profile>;
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fn deref(&self) -> &Option<super::Profile> {
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unsafe { &super::PROFILE }
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}
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}
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impl DerefMut for Lock {
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fn deref_mut(&mut self) -> &mut Option<super::Profile> {
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unsafe { &mut super::PROFILE }
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}
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}
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impl Drop for Lock {
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fn drop(&mut self) {
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LOCKED.store(0, Ordering::SeqCst)
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}
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}
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}
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use self::lock::Lock;
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pub fn start(interval_us: u64, hits_size: usize, edges_size: usize) -> Result<(), ()> {
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stop();
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let profile = Profile::new(hits_size, edges_size);
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info!("starting at {}us interval using {} heap bytes",
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interval_us, profile.overhead());
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*Lock::take().expect("cannot lock") = Some(profile);
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unsafe {
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let reload = csr::CONFIG_CLOCK_FREQUENCY as u64 * interval_us / 1_000_000;
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csr::timer1::load_write(reload);
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csr::timer1::reload_write(reload);
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csr::timer1::ev_pending_write(1);
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csr::timer1::ev_enable_write(1);
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irq::enable(csr::TIMER1_INTERRUPT);
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csr::timer1::en_write(1);
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}
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Ok(())
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}
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pub fn stop() {
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unsafe {
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if csr::timer1::en_read() == 0 || csr::timer1::ev_enable_read() == 0 {
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return
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}
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irq::disable(csr::TIMER1_INTERRUPT);
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csr::timer1::en_write(0);
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*Lock::take().expect("cannot lock") = None;
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info!("stopped");
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}
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}
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pub fn pause<F: FnOnce(Option<&mut Profile>) -> R, R>(f: F) -> R {
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unsafe {
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if csr::timer1::en_read() == 0 {
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return f(None)
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}
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irq::disable(csr::TIMER1_INTERRUPT);
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csr::timer1::en_write(0);
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let result = {
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let mut profile = Lock::take().expect("cannot lock");
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f(profile.as_mut())
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};
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irq::enable(csr::TIMER1_INTERRUPT);
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csr::timer1::en_write(1);
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result
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}
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}
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// Skip frames: ::profiler::sample, ::exception, exception vector.
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const SKIP_FRAMES: i32 = 3;
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#[inline(always)] // make the top of backtrace predictable
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fn record(profile: &mut Profile, exn_pc: usize) -> Result<(), ()> {
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let mut result = Ok(());
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let mut frame = -SKIP_FRAMES;
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// If we have storage for edges, use the DWARF unwinder.
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// Otherwise, don't bother and use a much faster path that just looks at EPCR.
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// Also, acquiring a meaningful backtrace requires libunwind
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// with the https://reviews.llvm.org/D46971 patch applied.
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if profile.has_edges() {
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let mut prev_pc = 0;
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let _ = backtrace(|pc| {
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// Backtrace gives us the return address, i.e. the address after the delay slot,
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||||
// but we're interested in the call instruction, *except* when going through
|
||||
// the frame directly below the exception frame, which has the address that's
|
||||
// being executed.
|
||||
let pc = if pc != exn_pc { pc - 2 * 4 } else { pc };
|
||||
|
||||
if frame == 0 {
|
||||
result = result.and_then(|()|
|
||||
profile.record_hit(Address::new(pc)));
|
||||
prev_pc = pc;
|
||||
} else if frame > 0 {
|
||||
result = result.and_then(|()|
|
||||
profile.record_edge(Address::new(pc),
|
||||
Address::new(prev_pc)));
|
||||
}
|
||||
|
||||
prev_pc = pc;
|
||||
frame += 1;
|
||||
});
|
||||
}
|
||||
|
||||
// If we couldn't get anything useful out of a backtrace, at least
|
||||
// record a hit at the exception PC.
|
||||
if frame <= 0 {
|
||||
result = profile.record_hit(Address::new(exn_pc));
|
||||
}
|
||||
|
||||
result
|
||||
}
|
||||
|
||||
#[inline(never)] // see above
|
||||
pub fn sample(pc: usize) {
|
||||
let result = {
|
||||
let mut profile = Lock::take().expect("cannot lock");
|
||||
record(profile.as_mut().expect("profiler not running"), pc)
|
||||
};
|
||||
|
||||
if result.is_err() {
|
||||
warn!("out of space");
|
||||
stop();
|
||||
} else {
|
||||
unsafe {
|
||||
csr::timer1::ev_pending_write(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(not(has_timer1))]
|
||||
mod imp {
|
||||
#![allow(dead_code)]
|
||||
|
||||
pub fn start(_interval_us: u64, _hits_size: usize, _edges_size: usize) -> Result<(), ()> {
|
||||
error!("timer not available");
|
||||
|
||||
Err(())
|
||||
}
|
||||
|
||||
pub fn stop() {}
|
||||
|
||||
pub fn pause<F: FnOnce(Option<&mut super::Profile>) -> R, R>(f: F) -> R {
|
||||
f(None)
|
||||
}
|
||||
|
||||
pub fn sample(_pc: usize) {}
|
||||
}
|
||||
|
||||
pub use self::imp::*;
|
||||
@ -9,7 +9,6 @@ from artiq import __version__ as artiq_version
|
||||
from artiq.master.databases import DeviceDB
|
||||
from artiq.coredevice.comm_kernel import CommKernel
|
||||
from artiq.coredevice.comm_mgmt import CommMgmt
|
||||
from artiq.coredevice.profiler import CallgrindWriter
|
||||
|
||||
|
||||
def get_argparser():
|
||||
@ -86,38 +85,6 @@ def get_argparser():
|
||||
t_boot = tools.add_parser("reboot",
|
||||
help="reboot the running system")
|
||||
|
||||
# profiling
|
||||
t_profile = tools.add_parser("profile",
|
||||
help="account for communications CPU time")
|
||||
|
||||
subparsers = t_profile.add_subparsers(dest="action")
|
||||
subparsers.required = True
|
||||
|
||||
p_start = subparsers.add_parser("start",
|
||||
help="start profiling")
|
||||
p_start.add_argument("--interval", metavar="MICROS", type=int, default=2000,
|
||||
help="sampling interval, in microseconds")
|
||||
p_start.add_argument("--hits-size", metavar="ENTRIES", type=int, default=8192,
|
||||
help="hit buffer size")
|
||||
p_start.add_argument("--edges-size", metavar="ENTRIES", type=int, default=8192,
|
||||
help="edge buffer size")
|
||||
|
||||
p_stop = subparsers.add_parser("stop",
|
||||
help="stop profiling")
|
||||
|
||||
p_save = subparsers.add_parser("save",
|
||||
help="save profile")
|
||||
p_save.add_argument("output", metavar="OUTPUT", type=argparse.FileType("w"),
|
||||
help="file to save profile to, in Callgrind format")
|
||||
p_save.add_argument("firmware", metavar="FIRMWARE", type=str,
|
||||
help="path to firmware ELF file")
|
||||
p_save.add_argument("--no-compression",
|
||||
dest="compression", default=True, action="store_false",
|
||||
help="disable profile compression")
|
||||
p_save.add_argument("--no-demangle",
|
||||
dest="demangle", default=True, action="store_false",
|
||||
help="disable symbol demangling")
|
||||
|
||||
# misc debug
|
||||
t_debug = tools.add_parser("debug",
|
||||
help="specialized debug functions")
|
||||
@ -174,21 +141,6 @@ def main():
|
||||
if args.tool == "reboot":
|
||||
mgmt.reboot()
|
||||
|
||||
if args.tool == "profile":
|
||||
if args.action == "start":
|
||||
mgmt.start_profiler(args.interval, args.hits_size, args.edges_size)
|
||||
elif args.action == "stop":
|
||||
mgmt.stop_profiler()
|
||||
elif args.action == "save":
|
||||
hits, edges = mgmt.get_profile()
|
||||
writer = CallgrindWriter(args.output, args.firmware, "or1k-linux",
|
||||
args.compression, args.demangle)
|
||||
writer.header()
|
||||
for addr, count in hits.items():
|
||||
writer.hit(addr, count)
|
||||
for (caller, callee), count in edges.items():
|
||||
writer.edge(caller, callee, count)
|
||||
|
||||
if args.tool == "debug":
|
||||
if args.action == "allocator":
|
||||
mgmt.debug_allocator()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user