From: Ken Brown <kbrown@cornell.edu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: sva-news@mygooglest.com, 20843@debbugs.gnu.org
Subject: bug#20843: 24.5; Profiler error: "Invalid sampling interval"
Date: Sun, 21 Jun 2015 18:17:27 -0400 [thread overview]
Message-ID: <558737F7.4080709@cornell.edu> (raw)
In-Reply-To: <83oak9hzzs.fsf@gnu.org>
On 6/21/2015 10:56 AM, Eli Zaretskii wrote:
>> Date: Sat, 20 Jun 2015 17:47:21 -0400
>> From: Ken Brown <kbrown@cornell.edu>
>> CC: sva-news@mygooglest.com, 20843@debbugs.gnu.org
>>
>>> Then I guess the configure-time test for setitimer should also test
>>> for ITIMER_PROF.
>>
>> I'd be glad to give this a try, but I don't have any experience writing
>> autoconf macros. Is there a standard macro to test whether a function
>> accepts a particular argument? If not, can you (or anyone) point me to
>> an example that I can imitate?
>
> Actually, perhaps I misunderstood you: are you saying that Cygwin does
> have ITIMER_PROF defined in the appropriate header, but when setitimer
> is called with it, it always fails?
Yes.
> If so, we cannot test this at
> configure time, because it means we will have to run a program, which
> is not a good idea.
>
> So in that case, I think we should simply disable the CPU profiler on
> Cygwin using "#ifndef __CYGWIN__" or some such.
Done as commit 5fac0de.
>>> Also, the diagnostics should be improved, as the
>>> wording is misleading in that case.
>>
>> As it stands, profiler-cpu-start reports "Invalid sampling interval"
>> whenever setup_cpu_timer fails to start the timer, regardless of the
>> reason. I'll try to improve this.
>
> Yes, please.
How's this:
--- a/src/profiler.c
+++ b/src/profiler.c
@@ -250,6 +250,8 @@ deliver_profiler_signal (int signal)
deliver_process_signal (signal, handle_profiler_signal);
}
+static bool sampling_interval_ok;
+
static enum profiler_cpu_running
setup_cpu_timer (Lisp_Object sampling_interval)
{
@@ -258,11 +260,13 @@ setup_cpu_timer (Lisp_Object sampling_interval)
struct timespec interval;
int billion = 1000000000;
- if (! RANGED_INTEGERP (1, sampling_interval,
- (TYPE_MAXIMUM (time_t) < EMACS_INT_MAX / billion
- ? ((EMACS_INT) TYPE_MAXIMUM (time_t) * billion
- + (billion - 1))
- : EMACS_INT_MAX)))
+ sampling_interval_ok =
+ RANGED_INTEGERP (1, sampling_interval,
+ (TYPE_MAXIMUM (time_t) < EMACS_INT_MAX / billion
+ ? ((EMACS_INT) TYPE_MAXIMUM (time_t) * billion
+ + (billion - 1))
+ : EMACS_INT_MAX));
+ if (! sampling_interval_ok)
return NOT_RUNNING;
current_sampling_interval = XINT (sampling_interval);
@@ -338,7 +342,12 @@ See also `profiler-log-size' and
`profiler-max-stack-depth'. */)
profiler_cpu_running = setup_cpu_timer (sampling_interval);
if (! profiler_cpu_running)
- error ("Invalid sampling interval");
+ {
+ if (! sampling_interval_ok)
+ error ("Invalid sampling interval");
+ else
+ error ("Unable to start profiler timer");
+ }
return Qt;
}
Ken
next prev parent reply other threads:[~2015-06-21 22:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-18 8:37 bug#20843: 24.5; Profiler error: "Invalid sampling interval" Sebastien Vauban
2015-06-18 8:57 ` Eli Zaretskii
[not found] ` <83k2v1l7g4.fsf-mXXj517/zsQ@public.gmane.org>
2015-06-18 11:58 ` Sebastien Vauban
[not found] ` <mailman.5225.1434628753.904.bug-gnu-emacs@gnu.org>
[not found] ` <mailman.5225.1434628753.904.bug-gnu-emacs-mXXj517/zsQ@public.gmane.org>
2015-06-19 13:38 ` Sebastien Vauban
2015-06-19 17:42 ` Eli Zaretskii
2015-06-20 19:02 ` Ken Brown
2015-06-20 19:10 ` Eli Zaretskii
2015-06-20 21:47 ` Ken Brown
2015-06-21 14:56 ` Eli Zaretskii
2015-06-21 22:17 ` Ken Brown [this message]
[not found] ` <558737F7.4080709-HmMyXyqgL2CVc3sceRu5cw@public.gmane.org>
2015-06-22 8:00 ` Sebastien Vauban
2015-06-22 11:57 ` Ken Brown
2015-06-22 15:12 ` Eli Zaretskii
2015-06-22 21:15 ` Ken Brown
2015-06-22 21:44 ` Ken Brown
[not found] ` <558881B0.6080404-HmMyXyqgL2CVc3sceRu5cw@public.gmane.org>
2015-06-23 8:39 ` Sebastien Vauban
2015-06-23 17:20 ` Ken Brown
[not found] ` <mailman.5513.1435080075.904.bug-gnu-emacs@gnu.org>
[not found] ` <mailman.5513.1435080075.904.bug-gnu-emacs-mXXj517/zsQ@public.gmane.org>
2015-07-02 13:27 ` Sebastien Vauban
2015-07-02 13:59 ` Ken Brown
2015-06-22 15:35 ` Eli Zaretskii
2015-06-22 18:04 ` Ken Brown
2015-06-22 18:50 ` Eli Zaretskii
2015-06-22 19:30 ` Ken Brown
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