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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-02-09 11:38:43 -0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-02-16 14:47:55 -0200
commit5c35d69fb60b1dc49595f5b9a2c7158283e9eaf3 (patch)
treeb41206e03fa84bcbb752a320513feb8f7b7603ad /tools
parentba3dd36c6775264ee6e7354ba1aabcd6e86d7298 (diff)
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Makefile1
-rw-r--r--tools/perf/util/ui/browser.c7
-rw-r--r--tools/perf/util/ui/helpline.c5
-rw-r--r--tools/perf/util/ui/setup.c3
-rw-r--r--tools/perf/util/ui/ui.h8
5 files changed, 23 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index bc4d9bf8a556..ffd1047cd93b 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -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
diff --git a/tools/perf/util/ui/browser.c b/tools/perf/util/ui/browser.c
index 8bc010edca25..60d6c815e1db 100644
--- a/tools/perf/util/ui/browser.c
+++ b/tools/perf/util/ui/browser.c
@@ -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;
}
diff --git a/tools/perf/util/ui/helpline.c b/tools/perf/util/ui/helpline.c
index 8d79daa4458a..f36d2ff509ed 100644
--- a/tools/perf/util/ui/helpline.c
+++ b/tools/perf/util/ui/helpline.c
@@ -5,6 +5,7 @@
#include "../debug.h"
#include "helpline.h"
+#include "ui.h"
void ui_helpline__pop(void)
{
@@ -55,7 +56,8 @@ int ui_helpline__show_help(const char *format, va_list ap)
int ret;
static int backlog;
- ret = vsnprintf(ui_helpline__last_msg + 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;
}
diff --git a/tools/perf/util/ui/setup.c b/tools/perf/util/ui/setup.c
index fbf1a145492f..ee46d671db59 100644
--- a/tools/perf/util/ui/setup.c
+++ b/tools/perf/util/ui/setup.c
@@ -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)
{
diff --git a/tools/perf/util/ui/ui.h b/tools/perf/util/ui/ui.h
new file mode 100644
index 000000000000..d264e059c829
--- /dev/null
+++ b/tools/perf/util/ui/ui.h
@@ -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_ */