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06d16959ee
I measured the performance penalty of the 725-entry blocklist, and it clocks in a 3% to 12%. I want to replace the painful for-loop with a map, assuming the map works more quickly.
93 lines
3.2 KiB
Go
93 lines
3.2 KiB
Go
package main_test
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import (
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"net"
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"os/exec"
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"strconv"
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"time"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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. "github.com/onsi/gomega/gbytes"
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. "github.com/onsi/gomega/gexec"
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"golang.org/x/net/dns/dnsmessage"
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)
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var _ = Describe("speed", func() {
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var serverCmd *exec.Cmd
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var serverSession *Session
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var port = getFreePort()
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var flags []string
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JustBeforeEach(func() {
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flags = append(flags, "-port", strconv.Itoa(port), "-blocklistURL", "file://etc/blocklist-test.txt")
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serverCmd = exec.Command(serverPath, flags...)
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serverSession, err = Start(serverCmd, GinkgoWriter, GinkgoWriter)
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Expect(err).ToNot(HaveOccurred())
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// takes 0.455s to start up on macOS Big Sur 3.7 GHz Quad Core 22-nm Xeon E5-1620v2 processor (2013 Mac Pro)
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// takes 1.312s to start up on macOS Big Sur 2.0GHz quad-core 10th-generation Intel Core i5 processor (2020 13" MacBook Pro)
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// 10 seconds should be long enough for slow container-on-a-VM-with-shared-core
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Eventually(serverSession.Err, 10).Should(Say("Ready to answer queries"))
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})
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AfterEach(func() {
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serverSession.Terminate()
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Eventually(serverSession).Should(Exit())
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})
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When("we want test the throughput", func() {
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var loopbackAddr *net.UDPAddr
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var conn *net.UDPConn
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var msg dnsmessage.Message
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const numQueries = 5000 // set to 123456 when testing
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const minThroughput = 1000
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BeforeEach(func() {
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loopbackAddr, err = net.ResolveUDPAddr("udp", "localhost:"+strconv.Itoa(port))
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Expect(err).ToNot(HaveOccurred())
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conn, err = net.DialUDP("udp", nil, loopbackAddr)
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Expect(err).ToNot(HaveOccurred())
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})
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It("runs "+strconv.Itoa(numQueries)+" queries and the throughput is > "+strconv.Itoa(minThroughput)+" queries/sec", func() {
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msg = dnsmessage.Message{
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Questions: []dnsmessage.Question{
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{
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Name: dnsmessage.MustNewName("127-0-0-1.sslip.io."),
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Type: dnsmessage.TypeA,
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Class: dnsmessage.ClassINET,
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},
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},
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}
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responseBuf := make([]byte, 512)
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queryBuf, err := msg.Pack()
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Expect(err).ToNot(HaveOccurred())
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startTime := time.Now()
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// The queries/second is conservative, realistically should be higher
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// - queries are done sequentially, not in parallel
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// - each query includes an overhead of 4 Expect()
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// current max queries is 2047/second (ns-ovh.sslip.io.)
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// ~27k Apple M4
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// ~19k Apple M2
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// ~8k vSphere Xeon D-1736 2.7GHz
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// ~6k AWS Graviton T2
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// ~5k Azure Xeon E5-2673 v4 @ 2.30GHz
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// blocklist exacts a 3% - 11% penalty
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// with `-quiet` and 4-entry blocklist on M4
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// ~32k-34k
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// with 725 entry blocklist
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// ~30k-31k
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for i := 0; i < numQueries; i += 1 {
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bytesWritten, err := conn.Write(queryBuf)
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Expect(err).ToNot(HaveOccurred())
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Expect(bytesWritten).To(Equal(len(queryBuf)))
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bytesRead, err := conn.Read(responseBuf)
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Expect(err).ToNot(HaveOccurred())
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Expect(bytesRead).To(Equal(52)) // The A record response "127.0.0.1" is 52 bytes
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}
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elapsedSeconds := time.Since(startTime).Seconds()
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Eventually(serverSession.Err).Should(Say(`TypeA 127-0-0-1\.sslip\.io\. \? 127\.0\.0\.1`))
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//fmt.Fprintf(os.Stderr, "Queries/second: %.2f\n", float64(numQueries)/elapsedSeconds)
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Expect(float64(numQueries) / elapsedSeconds).Should(BeNumerically(">", minThroughput))
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})
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})
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})
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