gatling、scala、svn 测试案例

本文介绍了一个使用Akka Actors和Gatling进行Subversion (SVN) 性能测试的示例。通过创建CheckoutAction、ImportAction及LogAction等类来模拟SVN的检出、导入文件和日志检查操作。

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package svnperformance

import akka.actor.Props
import akka.actor.ActorRef
import io.gatling.core.scenario.configuration.Simulation
import io.gatling.core.action.builder.ActionBuilder
import io.gatling.core.structure.ChainBuilder
import io.gatling.core.config.ProtocolConfigurationRegistry
import io.gatling.core.Predef._
import io.gatling.core.action.Action
import io.gatling.core.action.system
import io.gatling.core.result.writer.DataWriter
import io.gatling.core.result.message.RequestMessage
import io.gatling.core.result.message.{ KO, OK }
import org.tmatesoft.svn.core.SVNURL
import org.tmatesoft.svn.core.internal.io.dav.DAVRepositoryFactory
import org.tmatesoft.svn.core.wc.SVNWCUtil
import org.tmatesoft.svn.core.io.SVNRepositoryFactory
import org.tmatesoft.svn.core.wc.SVNClientManager
import org.tmatesoft.svn.core.wc.SVNRevision
import org.tmatesoft.svn.core.ISVNLogEntryHandler
import java.io.File
import java.util.Date
import scala.util.Random

class SVNTest extends Simulation {
  val checkout = new ActionBuilder {
    override def build(next: ActorRef, protocolConfigurationRegistry: ProtocolConfigurationRegistry) = system.actorOf(Props(new CheckoutAction(next)))
  }
  val checkoutList = List(checkout)
  val checktry = new ChainBuilder(checkoutList)

  val importfiles = new ActionBuilder {
    override def build(next: ActorRef, protocolConfigurationRegistry: ProtocolConfigurationRegistry) = system.actorOf(Props(new ImportAction(next)))
  }
  val importfilesList = List(importfiles)
  val importtry = new ChainBuilder(importfilesList)
 
  val logcheck = new ActionBuilder {
    override def build(next: ActorRef, protocolConfigurationRegistry: ProtocolConfigurationRegistry) = system.actorOf(Props(new LogAction(next)))
  }
  val logcheckList = List(logcheck)
  val logtry = new ChainBuilder(logcheckList)
 
  //val scn_checkout = scenario("checkout").during(60,"",false){checktry} // error!
  //val scn_checkout = scenario("checkout").tryMax(10) { checktry } // cant stop!
  //val scn_checkout = scenario("checkout").exitBlockOnFail(checktry) // cant stop!
  //val scn_checkout = scenario("checkout").repeat(5){checktry}.exitHereIfFailed
  val scn_checkout = scenario("checkout").repeat(10) { checktry } //repeat 5 times
  val scn_import = scenario("importfiles").repeat(10) { importtry } //repeat 5 times
  val scn_log = scenario("logcheck").repeat(10) { logtry } //repeat 5 times

  setUp(scn_checkout.inject(ramp(20 users).over(10)),
    scn_import.inject(ramp(20 users).over(10)),
    scn_log.inject(ramp(10 users).over(10))
  )
}

class CheckoutAction(val next: ActorRef) extends Action() {
  /*val svnhost = "http://svn-dr.paic.com.cn/svn/svntest/trunk/smallDir2/"
  val user = "svntest002"
  val pass = "Paic1234"*/
  val svnhost = "https://192.168.1.199/svn/projects/trunk/Data2/"
  val user = "orj"
  val pass = "123"

  override def execute(session: Session) {
    try {
      var start = new Date().getTime

      val aa = new Random().nextInt(10) + 1
      val bb = new Random().nextInt(10) + 1
      val url0 = svnhost + "tmp" + aa.toString + "/tmp" + bb.toString //
      println(url0)
      val url = SVNURL.parseURIEncoded(url0) //svnurl

      val cc = new Random().nextInt(100000) + 1
      val desDir0 = "D:/tmp/tmp00/tmp" + start + cc.toString //
      println(desDir0)
      val desDir = new File(desDir0) //local path

      DAVRepositoryFactory.setup
      val options = SVNWCUtil.createDefaultOptions(true)
      val authManager = SVNWCUtil.createDefaultAuthenticationManager(user, pass)
      val repos = SVNRepositoryFactory.create(url)
      repos.setAuthenticationManager(authManager)
      val svnclient = SVNClientManager.newInstance
      val updateclient = svnclient.getUpdateClient
      updateclient.setIgnoreExternals(false)
      val revision = repos.getLatestRevision
      println(revision);

      println("checkout")
      val checkout = updateclient.doCheckout(url, desDir, SVNRevision.UNDEFINED, SVNRevision.HEAD, true)
      println(checkout.toString());
      var end = new Date().getTime
      DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "checkout", start, end, end, end, OK, None, Nil))
    } catch {
      case e: Throwable => {
        var start = new Date().getTime
        e.printStackTrace
        var end = new Date().getTime
        DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "checkout", start, end, end, end, KO, None, Nil))
      }
    }
    next ! session
  }
}

class ImportAction(val next: ActorRef) extends Action() {
  /*val svnhost = "http://svn-dr.paic.com.cn/svn/svntest/trunk/commit/tmp0/"
  val user = "svntest002"
  val pass = "Paic1234"*/
  val svnhost = "https://192.168.1.199/svn/projects/trunk/Data3/"
  val user = "orj"
  val pass = "123"

  override def execute(session: Session) {
    try {
      var start = new Date().getTime
      val aa = new Random().nextInt(100000) + 1
      val svnurl0 = svnhost + "tmp" + start + aa.toString //
      println(svnurl0)
      val svnurl = SVNURL.parseURIEncoded(svnurl0) //svnurl

      val bb = new Random().nextInt(10) + 1
      val localDir0 = "D:/tmp/Data/tmp" + bb.toString //
      println(localDir0)
      val localDir = new File(localDir0)

      DAVRepositoryFactory.setup
      val options = SVNWCUtil.createDefaultOptions(true)
      val authManager = SVNWCUtil.createDefaultAuthenticationManager(user, pass)
      val repos = SVNRepositoryFactory.create(svnurl)
      repos.setAuthenticationManager(authManager)
      val svnClient = SVNClientManager.newInstance
      val importClient = svnClient.getCommitClient()
      importClient.setIgnoreExternals(false)
      val revision = repos.getLatestRevision
      println(revision);

      println("importFiles")
      val importFiles = importClient.doImport(localDir, svnurl, "", true)
      println(importFiles.toString());
      var end = new Date().getTime
      DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "importFiles", start, end, end, end, OK, None, Nil))
    } catch {
      case e: Throwable => {
        var start = new Date().getTime
        e.printStackTrace
        var end = new Date().getTime
        DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "importFiles", start, end, end, end, KO, None, Nil))
      }
    }
    next ! session
  }
}

class LogAction(val next: ActorRef) extends Action() {
  /*val svnhost = "http://svn-dr.paic.com.cn/svn/svntest/trunk/commit/tmp0/"
  val user = "svntest002"
  val pass = "Paic1234"*/
  val svnhost = "https://192.168.1.199/svn/projects/trunk/Data3/"
  val user = "orj"
  val pass = "123"

  override def execute(session: Session) {
    try {
      var start = new Date().getTime

      val svnurl = SVNURL.parseURIEncoded(svnhost) //svnurl

      val bb = new Random().nextInt(10) + 1
      val localDir0 = "D:/tmp/"
      println(localDir0)
      val localDir = new File(localDir0)

      DAVRepositoryFactory.setup
      val options = SVNWCUtil.createDefaultOptions(true)
      val authManager = SVNWCUtil.createDefaultAuthenticationManager(user, pass)
      val repos = SVNRepositoryFactory.create(svnurl)
      repos.setAuthenticationManager(authManager)
      val svnClient = SVNClientManager.newInstance
      val logClient = svnClient.getLogClient()
      logClient.setIgnoreExternals(false)
      val revision = repos.getLatestRevision
      println(revision);
      val r = SVNRevision.create(revision)

      println("importFiles")
      val logCheck = logClient.doLog(svnurl, new Array[String](0), r, r, r, false, false, true, 1, new Array[String](0), null)
      println(logCheck.toString());
      var end = new Date().getTime
      DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "logCheck", start, end, end, end, OK, None, Nil))
    } catch {
      case e: Throwable => {
        var start = new Date().getTime
        e.printStackTrace
        var end = new Date().getTime
        DataWriter.tell(RequestMessage(session.scenarioName, session.userId, Nil, "logCheck", start, end, end, end, KO, None, Nil))
      }
    }
    next ! session
  }
}
### RT-DETRv3 网络结构分析 RT-DETRv3 是一种基于 Transformer 的实时端到端目标检测算法,其核心在于通过引入分层密集正监督方法以及一系列创新性的训练策略,解决了传统 DETR 模型收敛慢和解码器训练不足的问题。以下是 RT-DETRv3 的主要网络结构特点: #### 1. **基于 CNN 的辅助分支** 为了增强编码器的特征表示能力,RT-DETRv3 引入了一个基于卷积神经网络 (CNN) 的辅助分支[^3]。这一分支提供了密集的监督信号,能够与原始解码器协同工作,从而提升整体性能。 ```python class AuxiliaryBranch(nn.Module): def __init__(self, in_channels, out_channels): super(AuxiliaryBranch, self).__init__() self.conv = nn.Conv2d(in_channels, out_channels, kernel_size=3, padding=1) self.bn = nn.BatchNorm2d(out_channels) def forward(self, x): return F.relu(self.bn(self.conv(x))) ``` 此部分的设计灵感来源于传统的 CNN 架构,例如 YOLO 系列中的 CSPNet 和 PAN 结构[^2],这些技术被用来优化特征提取效率并减少计算开销。 --- #### 2. **自注意力扰动学习策略** 为解决解码器训练不足的问题,RT-DETRv3 提出了一种名为 *self-att 扰动* 的新学习策略。这种策略通过对多个查询组中阳性样本的标签分配进行多样化处理,有效增加了阳例的数量,进而提高了模型的学习能力和泛化性能。 具体实现方式是在训练过程中动态调整注意力权重分布,确保更多的高质量查询可以与真实标注 (Ground Truth) 进行匹配。 --- #### 3. **共享权重解编码器分支** 除了上述改进外,RT-DETRv3 还引入了一个共享权重的解编码器分支,专门用于提供密集的正向监督信号。这一设计不仅简化了模型架构,还显著降低了参数量和推理时间,使其更适合实时应用需求。 ```python class SharedDecoderEncoder(nn.Module): def __init__(self, d_model, nhead, num_layers): super(SharedDecoderEncoder, self).__init__() decoder_layer = nn.TransformerDecoderLayer(d_model=d_model, nhead=nhead) self.decoder = nn.TransformerDecoder(decoder_layer, num_layers=num_layers) def forward(self, tgt, memory): return self.decoder(tgt=tgt, memory=memory) ``` 通过这种方式,RT-DETRv3 实现了高效的目标检测流程,在保持高精度的同时大幅缩短了推理延迟。 --- #### 4. **与其他模型的关系** 值得一提的是,RT-DETRv3 并未完全抛弃经典的 CNN 技术,而是将其与 Transformer 结合起来形成混合架构[^4]。例如,它采用了 YOLO 系列中的 RepNCSP 模块替代冗余的多尺度自注意力层,从而减少了不必要的计算负担。 此外,RT-DETRv3 还借鉴了 DETR 的一对一匹配策略,并在此基础上进行了优化,进一步提升了小目标检测的能力。 --- ### 总结 综上所述,RT-DETRv3 的网络结构主要包括以下几个关键组件:基于 CNN 的辅助分支、自注意力扰动学习策略、共享权重解编码器分支以及混合编码器设计。这些技术创新共同推动了实时目标检测领域的发展,使其在复杂场景下的表现更加出色。 ---
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