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perf ui: Serialize screen updates 

The ui operations so far were used by just one thread, but 'perf top
--tui' now has two threads updating the screen, so we need to use a
mutex to avoid garbling the screen.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-02-09 11:38:43 -02:00
parent ba3dd36c67
commit 5c35d69fb6
5 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/Makefile
View File

@ -637,6 +637,7 @@ else
LIB_H += util/ui/libslang.h
LIB_H += util/ui/progress.h
LIB_H += util/ui/util.h
LIB_H += util/ui/ui.h
endif
endif

7
tools/perf/util/ui/browser.c
View File

@ -1,4 +1,5 @@
#include "libslang.h"
#include "ui.h"
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/rbtree.h>
@ -178,6 +179,7 @@ int ui_browser__show(struct ui_browser *self, const char *title,
if (self->sb == NULL)
return -1;
pthread_mutex_lock(&ui__lock);
SLsmg_gotorc(0, 0);
ui_browser__set_color(self, NEWT_COLORSET_ROOT);
slsmg_write_nstring(title, self->width);
@ -188,25 +190,30 @@ int ui_browser__show(struct ui_browser *self, const char *title,
va_start(ap, helpline);
ui_helpline__vpush(helpline, ap);
va_end(ap);
pthread_mutex_unlock(&ui__lock);
return 0;
}
void ui_browser__hide(struct ui_browser *self)
{
pthread_mutex_lock(&ui__lock);
newtFormDestroy(self->form);
self->form = NULL;
ui_helpline__pop();
pthread_mutex_unlock(&ui__lock);
}
int ui_browser__refresh(struct ui_browser *self)
{
int row;
pthread_mutex_lock(&ui__lock);
newtScrollbarSet(self->sb, self->index, self->nr_entries - 1);
row = self->refresh(self);
ui_browser__set_color(self, HE_COLORSET_NORMAL);
SLsmg_fill_region(self->y + row, self->x,
self->height - row, self->width, ' ');
pthread_mutex_unlock(&ui__lock);
return 0;
}

3
tools/perf/util/ui/helpline.c
View File

@ -5,6 +5,7 @@
#include "../debug.h"
#include "helpline.h"
#include "ui.h"
void ui_helpline__pop(void)
{
@ -55,6 +56,7 @@ int ui_helpline__show_help(const char *format, va_list ap)
int ret;
static int backlog;
pthread_mutex_lock(&ui__lock);
ret = vsnprintf(ui_helpline__last_msg + backlog,
sizeof(ui_helpline__last_msg) - backlog, format, ap);
backlog += ret;
@ -64,6 +66,7 @@ int ui_helpline__show_help(const char *format, va_list ap)
newtRefresh();
backlog = 0;
}
pthread_mutex_unlock(&ui__lock);
return ret;
}

3
tools/perf/util/ui/setup.c
View File

@ -6,6 +6,9 @@
#include "../debug.h"
#include "browser.h"
#include "helpline.h"
#include "ui.h"
pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
static void newt_suspend(void *d __used)
{

8
tools/perf/util/ui/ui.h Normal file
View File

@ -0,0 +1,8 @@
#ifndef _PERF_UI_H_
#define _PERF_UI_H_ 1
#include <pthread.h>
extern pthread_mutex_t ui__lock;
#endif /* _PERF_UI_H_ */