Re: [PATCH 3/9] server: remove worker thread creation from dispatcher

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On Wed, 2015-10-21 at 08:21 -0400, Frediano Ziglio wrote:
> > 
> > From: Marc-André Lureau <marcandre.lureau@xxxxxxxxx>
> > 
> > ---
> >  server/dispatcher.c     | 13 +++++++++++++
> >  server/dispatcher.h     |  2 ++
> >  server/red_dispatcher.c | 21 +++------------------
> >  server/red_dispatcher.h |  6 +-----
> >  server/red_worker.c     | 33 ++++++++++++++++++++++++++++++---
> >  server/red_worker.h     |  5 ++++-
> >  6 files changed, 53 insertions(+), 27 deletions(-)
> > 
> > diff --git a/server/dispatcher.c b/server/dispatcher.c
> > index d6c03ca..d334117 100644
> > --- a/server/dispatcher.c
> > +++ b/server/dispatcher.c
> > @@ -32,6 +32,7 @@
> >  #include "common/mem.h"
> >  #include "common/spice_common.h"
> >  #include "dispatcher.h"
> > +#include "red_dispatcher.h"
> >  
> >  //#define DEBUG_DISPATCHER
> >  
> > @@ -200,6 +201,18 @@ unlock:
> >      pthread_mutex_unlock(&dispatcher->lock);
> >  }
> >  
> > +uint32_t dispatcher_read_message(Dispatcher *dispatcher)
> > +{
> > +    uint32_t message;
> > +
> > +    spice_return_val_if_fail(dispatcher, 0);
> > +    spice_return_val_if_fail(dispatcher->send_fd != -1, 0);
> > +
> > +    receive_data(dispatcher->send_fd, &message, sizeof(message));
> > +
> > +    return message;
> > +}
> > +
> >  void dispatcher_register_async_done_callback(
> >                                          Dispatcher *dispatcher,
> >                                         
> >  dispatcher_handle_async_done
> >                                          handler)
> > diff --git a/server/dispatcher.h b/server/dispatcher.h
> > index c3e7c74..8882532 100644
> > --- a/server/dispatcher.h
> > +++ b/server/dispatcher.h
> > @@ -19,6 +19,7 @@
> >  #define DISPATCHER_H
> >  
> >  #include <spice.h>
> > +#include "spice_server_utils.h"
> >  
> >  typedef struct Dispatcher Dispatcher;
> >  
> 
> This include can be removed
> 
> > @@ -63,6 +64,7 @@ struct Dispatcher {
> >   */
> >  void dispatcher_send_message(Dispatcher *dispatcher, uint32_t
> > message_type,
> >                               void *payload);
> > +uint32_t dispatcher_read_message(Dispatcher *dispatcher);
> >  
> >  /*
> >   * dispatcher_init
> > diff --git a/server/red_dispatcher.c b/server/red_dispatcher.c
> > index 7ad860c..0bc853d 100644
> > --- a/server/red_dispatcher.c
> > +++ b/server/red_dispatcher.c
> > @@ -56,7 +56,6 @@ struct RedDispatcher {
> >      QXLWorker base;
> >      QXLInstance *qxl;
> >      Dispatcher dispatcher;
> > -    pthread_t worker_thread;
> >      uint32_t pending;
> >      int primary_active;
> >      int x_res;
> > @@ -1064,14 +1063,10 @@ static RedChannel
> > *red_dispatcher_cursor_channel_create(RedDispatcher *dispatche
> >  void red_dispatcher_init(QXLInstance *qxl)
> >  {
> >      RedDispatcher *red_dispatcher;
> > -    RedWorkerMessage message;
> >      WorkerInitData init_data;
> >      QXLDevInitInfo init_info;
> > -    int r;
> >      RedChannel *display_channel;
> >      RedChannel *cursor_channel;
> > -    sigset_t thread_sig_mask;
> > -    sigset_t curr_sig_mask;
> >      ClientCbs client_cbs = { NULL, };
> >  
> >      spice_return_if_fail(qxl->st->dispatcher == NULL);
> > @@ -1135,19 +1130,9 @@ void red_dispatcher_init(QXLInstance *qxl)
> >  
> >      num_active_workers = 1;
> >  
> > -    sigfillset(&thread_sig_mask);
> > -    sigdelset(&thread_sig_mask, SIGILL);
> > -    sigdelset(&thread_sig_mask, SIGFPE);
> > -    sigdelset(&thread_sig_mask, SIGSEGV);
> > -    pthread_sigmask(SIG_SETMASK, &thread_sig_mask,
> > &curr_sig_mask);
> > -    if ((r = pthread_create(&red_dispatcher->worker_thread, NULL,
> > red_worker_main, &init_data))) {
> > -        spice_error("create thread failed %d", r);
> > -    }
> > -    pthread_sigmask(SIG_SETMASK, &curr_sig_mask, NULL);
> > -
> > -    read_message(red_dispatcher->dispatcher.send_fd, &message);
> > -    spice_assert(message == RED_WORKER_MESSAGE_READY);
> > -
> > +    // TODO: reference and free
> > +    RedWorker *worker = red_worker_new(&init_data);
> > +    red_worker_run(worker);
> >      display_channel =
> > red_dispatcher_display_channel_create(red_dispatcher);
> >  
> >      if (display_channel) {
> > diff --git a/server/red_dispatcher.h b/server/red_dispatcher.h
> > index dbe65d1..2121007 100644
> > --- a/server/red_dispatcher.h
> > +++ b/server/red_dispatcher.h
> > @@ -18,6 +18,7 @@
> >  #ifndef _H_RED_DISPATCHER
> >  #define _H_RED_DISPATCHER
> >  
> > +#include <unistd.h>
> >  #include <errno.h>
> >  #include "spice_server_utils.h"
> >  #include "red_channel.h"
> 
> Even this include
> 
> > @@ -83,11 +84,6 @@ static inline void receive_data(int fd, void
> > *in_buf, int
> > n)
> >      } while (n);
> >  }
> >  
> > -static inline void read_message(int fd, RedWorkerMessage *message)
> > -{
> > -    receive_data(fd, message, sizeof(RedWorkerMessage));
> > -}
> > -
> >  enum {
> >      RED_WORKER_MESSAGE_NOP,
> >      RED_WORKER_MESSAGE_UPDATE,
> > diff --git a/server/red_worker.c b/server/red_worker.c
> > index 225c272..daa233b 100644
> > --- a/server/red_worker.c
> > +++ b/server/red_worker.c
> > @@ -868,6 +868,7 @@ typedef struct ItemTrace {
> >  #define NUM_CURSORS 100
> >  
> >  typedef struct RedWorker {
> > +    pthread_t thread;
> >      DisplayChannel *display_channel;
> >      CursorChannel *cursor_channel;
> >      QXLInstance *qxl;
> > @@ -11849,7 +11850,7 @@ static void handle_dev_input(int fd, int
> > event, void
> > *opaque)
> >     
> >  dispatcher_handle_recv_read(red_dispatcher_get_dispatcher(worker
> > ->red_dispatcher));
> >  }
> >  
> > -static RedWorker* red_worker_new(WorkerInitData *init_data)
> > +RedWorker* red_worker_new(WorkerInitData *init_data)
> >  {
> >      RedWorker *worker = spice_new0(RedWorker, 1);
> >      RedWorkerMessage message;
> > @@ -11954,14 +11955,15 @@ static void
> > red_display_cc_free_glz_drawables(RedChannelClient *rcc)
> >      red_display_handle_glz_drawables_to_free(dcc);
> >  }
> >  
> > -SPICE_GNUC_NORETURN void *red_worker_main(void *arg)
> > +SPICE_GNUC_NORETURN static void *red_worker_main(void *arg)
> >  {
> > -    RedWorker *worker = red_worker_new(arg);
> > +    RedWorker *worker = arg;
> >  
> >      spice_info("begin");
> >      spice_assert(MAX_PIPE_SIZE > WIDE_CLIENT_ACK_WINDOW &&
> >             MAX_PIPE_SIZE > NARROW_CLIENT_ACK_WINDOW); //ensure
> > wakeup by ack
> >             message
> >  
> > +    // TODO: call once unconditionnally
> >      if (pthread_getcpuclockid(pthread_self(), &clock_id)) {
> >          spice_error("pthread_getcpuclockid failed");
> >      }
> > @@ -12028,3 +12030,28 @@ SPICE_GNUC_NORETURN void
> > *red_worker_main(void *arg)
> >  
> >      spice_warn_if_reached();
> >  }
> > +
> > +bool red_worker_run(RedWorker *worker)
> > +{
> > +    uint32_t message;
> > +    sigset_t thread_sig_mask;
> > +    sigset_t curr_sig_mask;
> > +    int r;
> > +
> > +    spice_return_val_if_fail(worker, FALSE);
> > +    spice_return_val_if_fail(!worker->thread, FALSE);
> > +
> > +    sigfillset(&thread_sig_mask);
> > +    sigdelset(&thread_sig_mask, SIGILL);
> > +    sigdelset(&thread_sig_mask, SIGFPE);
> > +    sigdelset(&thread_sig_mask, SIGSEGV);
> > +    pthread_sigmask(SIG_SETMASK, &thread_sig_mask,
> > &curr_sig_mask);
> > +    if ((r = pthread_create(&worker->thread, NULL,
> > red_worker_main,
> > worker))) {
> > +        spice_error("create thread failed %d", r);
> > +    }
> > +    pthread_sigmask(SIG_SETMASK, &curr_sig_mask, NULL);
> > +
> > +    message =
> > dispatcher_read_message(red_dispatcher_get_dispatcher(worker
> > ->red_dispatcher));
> > +
> > +    return message == RED_WORKER_MESSAGE_READY;
> > +}
> > diff --git a/server/red_worker.h b/server/red_worker.h
> > index c71e9c8..c935e0a 100644
> > --- a/server/red_worker.h
> > +++ b/server/red_worker.h
> > @@ -37,6 +37,8 @@ enum {
> >      RED_RENDERER_LAST
> >  };
> >  
> > +typedef struct RedWorker RedWorker;
> > +
> >  typedef struct WorkerInitData {
> >      struct QXLInstance *qxl;
> >      int id;
> > @@ -56,6 +58,7 @@ typedef struct WorkerInitData {
> >      RedDispatcher *red_dispatcher;
> >  } WorkerInitData;
> >  
> > -void *red_worker_main(void *arg);
> > +RedWorker* red_worker_new(WorkerInitData *init_data);
> > +bool       red_worker_run(RedWorker *worker);
> >  
> >  #endif
> 
> Beside these small changes I agree with this patch.

Agree, ACK from me as well.


> 
> Frediano
> _______________________________________________
> Spice-devel mailing list
> Spice-devel@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/spice-devel
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