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MDEV-14781 - threadpool slowdown with slow ssl handshake.

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Fix is not to use blocking socket IO during SSL handshake.
With non-blocking socket IO, threadpool is able to utilize the wait
notification callbacks, that vio_io_wait() is calling whenever
socket would block.
This commit is contained in:
Vladislav Vaintroub 2018-11-06 09:29:41 +01:00
parent 54b8856b87
commit 04789ec801
1 changed files with 3 additions and 7 deletions
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10
vio/viossl.c
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@ -124,6 +124,9 @@ static my_bool ssl_should_retry(Vio *vio, int ret, enum enum_vio_io_event *event
default:
should_retry= FALSE;
ssl_set_sys_error(ssl_error);
#ifndef HAVE_YASSL
ERR_clear_error();
#endif
break;
}
@ -315,21 +318,16 @@ static int ssl_do(struct st_VioSSLFd *ptr, Vio *vio, long timeout,
{
int r;
SSL *ssl;
my_bool unused;
my_bool was_blocking;
my_socket sd= mysql_socket_getfd(vio->mysql_socket);
DBUG_ENTER("ssl_do");
DBUG_PRINT("enter", ("ptr: %p, sd: %d ctx: %p",
ptr, (int)sd, ptr->ssl_context));
/* Set socket to blocking if not already set */
vio_blocking(vio, 1, &was_blocking);
if (!(ssl= SSL_new(ptr->ssl_context)))
{
DBUG_PRINT("error", ("SSL_new failure"));
*errptr= ERR_get_error();
vio_blocking(vio, was_blocking, &unused);
DBUG_RETURN(1);
}
DBUG_PRINT("info", ("ssl: %p timeout: %ld", ssl, timeout));
@ -360,7 +358,6 @@ static int ssl_do(struct st_VioSSLFd *ptr, Vio *vio, long timeout,
DBUG_PRINT("error", ("SSL_connect/accept failure"));
*errptr= SSL_errno(ssl, r);
SSL_free(ssl);
vio_blocking(vio, was_blocking, &unused);
DBUG_RETURN(1);
}
@ -371,7 +368,6 @@ static int ssl_do(struct st_VioSSLFd *ptr, Vio *vio, long timeout,
*/
if (vio_reset(vio, VIO_TYPE_SSL, SSL_get_fd(ssl), ssl, 0))
{
vio_blocking(vio, was_blocking, &unused);
DBUG_RETURN(1);
}