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Add the memory swappiness tuning option to docker.

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Memory swappiness option takes 0-100, and helps to tune swappiness
behavior per container.
For example, When a lower value of swappiness is chosen
the container will see minimum major faults. When no value is
specified for memory-swappiness in docker UI, it is inherited from
parent cgroup. (generally 60 unless it is changed).

Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
This commit is contained in:
Raghavendra K T
2015-07-12 13:16:33 +05:30
parent 9264d38424
commit 921da495d2
15 changed files with 165 additions and 90 deletions
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integration-cli/docker_cli_run_test.go
+21
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@@ -61,6 +61,27 @@ func (s *DockerSuite) TestRunWithoutMemoryswapLimit(c *check.C) {
}
}
func (s *DockerSuite) TestRunWithSwappiness(c *check.C) {
runCmd := exec.Command(dockerBinary, "run", "--memory-swappiness", "0", "busybox", "true")
out, _, err := runCommandWithOutput(runCmd)
if err != nil {
c.Fatalf("failed to run container, output: %q", out)
}
}
func (s *DockerSuite) TestRunWithSwappinessInvalid(c *check.C) {
runCmd := exec.Command(dockerBinary, "run", "--memory-swappiness", "101", "busybox", "true")
out, _, err := runCommandWithOutput(runCmd)
if err == nil {
c.Fatalf("failed. test was able to set invalid value, output: %q", out)
}
runCmd = exec.Command(dockerBinary, "run", "--memory-swappiness", "-1", "busybox", "true")
out, _, err = runCommandWithOutput(runCmd)
if err == nil {
c.Fatalf("failed. test was able to set invalid value, output: %q", out)
}
}
// "test" should be printed
func (s *DockerSuite) TestRunEchoStdoutWitCPULimit(c *check.C) {
runCmd := exec.Command(dockerBinary, "run", "-c", "1000", "busybox", "echo", "test")