Re: [Qemu-devel] [PATCH 5/6] tests: Add migration compress threads tests

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Juan Quintela (quintela@redhat.com) wrote:
> For some reason, compression is not working at the moment, test is
> disabled until I found why.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> ---
>  tests/migration-test.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
> 
> diff --git a/tests/migration-test.c b/tests/migration-test.c
> index f0734e4ba0..a8abc3d007 100644
> --- a/tests/migration-test.c
> +++ b/tests/migration-test.c
> @@ -621,6 +621,54 @@ static void test_xbzrle_unix(void)
>      g_free(uri);
>  }
>  
> +static void test_compress(const char *uri)
> +{
> +    QTestState *from, *to;
> +
> +    test_migrate_start(&from, &to, uri);
> +
> +    /* We want to pick a speed slow enough that the test completes
> +     * quickly, but that it doesn't complete precopy even on a slow
> +     * machine, so also set the downtime.
> +     */
> +    /* 100 ms */
> +    migrate_set_parameter(from, "downtime-limit", "100");
> +    /* 1MB/s slow*/
> +    migrate_set_parameter(from, "max-bandwidth", "100000000");
> +
> +    migrate_set_parameter(from, "compress-threads", "4");
> +    migrate_set_parameter(from, "decompress-threads", "3"); 

Should that be 'to' ?

I worry about having this many threads in a loaded test environment.

Dave

> +    migrate_set_capability(from, "compress", "true");
> +    migrate_set_capability(to, "compress", "true");
> +    /* Wait for the first serial output from the source */
> +    wait_for_serial("src_serial");
> +
> +    migrate(from, uri);
> +
> +    wait_for_migration_pass(from);
> +
> +    /* 1GB/s now it should converge */
> +    migrate_set_parameter(from, "max-bandwidth", "1000000000");
> +
> +    if (!got_stop) {
> +        qtest_qmp_eventwait(from, "STOP");
> +    }
> +    qtest_qmp_eventwait(to, "RESUME");
> +
> +    wait_for_serial("dest_serial");
> +    wait_for_migration_complete(from);
> +
> +    test_migrate_end(from, to);
> +}
> +
> +static void test_compress_unix(void)
> +{
> +    char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
> +
> +    test_compress(uri);
> +    g_free(uri);
> +}
>  
>  int main(int argc, char **argv)
>  {
> @@ -641,6 +689,9 @@ int main(int argc, char **argv)
>      qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
>      qtest_add_func("/migration/deprecated/unix", test_deprecated_unix);
>      qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
> +    if (0) {
> +        qtest_add_func("/migration/compress/unix", test_compress_unix);
> +    }
>  
>      ret = g_test_run();
>  
> -- 
> 2.13.5
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK