Bug #44530 mtr v2 startup very slow on Windows.
MTR is stuck for about 20 seconds checking for free ports. The reason is that perl's connect() takes 1 second on windows if port is not opened. This patch fixes the mtr_ping_port implementation on Windows to use Net::Ping for the port checking with small (0.1sec) timeout. This patch also removes pointless second call to check_ports_free() in case of auto build thread.
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@ -21,6 +21,9 @@
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use strict;
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use strict;
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use Socket;
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use Socket;
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use Errno;
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use Errno;
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use My::Platform;
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use if IS_WINDOWS, "Net::Ping";
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sub sleep_until_file_created ($$$);
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sub sleep_until_file_created ($$$);
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sub mtr_ping_port ($);
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sub mtr_ping_port ($);
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@ -30,6 +33,25 @@ sub mtr_ping_port ($) {
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mtr_verbose("mtr_ping_port: $port");
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mtr_verbose("mtr_ping_port: $port");
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if (IS_WINDOWS)
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{
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# Under Windows, connect to a port that is not open is slow
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# It takes ~1sec. Net::Ping with small timeout is much faster.
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my $ping = Net::Ping->new();
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$ping->port_number($port);
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if ($ping->ping("localhost",0.1))
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{
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mtr_verbose("USED");
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return 1;
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}
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else
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{
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mtr_verbose("FREE");
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return 0;
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}
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}
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my $remote= "localhost";
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my $remote= "localhost";
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my $iaddr= inet_aton($remote);
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my $iaddr= inet_aton($remote);
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if ( ! $iaddr )
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if ( ! $iaddr )
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@ -1344,13 +1344,12 @@ sub set_build_thread_ports($) {
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else
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else
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{
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{
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$build_thread = $opt_build_thread + $thread - 1;
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$build_thread = $opt_build_thread + $thread - 1;
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}
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$ENV{MTR_BUILD_THREAD}= $build_thread;
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if (! check_ports_free($build_thread)) {
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if (! check_ports_free($build_thread)) {
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# Some port was not free(which one has already been printed)
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# Some port was not free(which one has already been printed)
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mtr_error("Some port(s) was not free")
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mtr_error("Some port(s) was not free")
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}
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}
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}
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$ENV{MTR_BUILD_THREAD}= $build_thread;
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# Calculate baseport
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# Calculate baseport
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$baseport= $build_thread * 10 + 10000;
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$baseport= $build_thread * 10 + 10000;
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