Re: 2.6.19-rc5: known regressions (v3)

[William Cohen <wcohen@redhat.com>]

Eric Dumazet wrote:
> On Wednesday 15 November 2006 11:35, Eric Dumazet wrote:
>
> > On Wednesday 15 November 2006 11:21, Adrian Bunk wrote:
> >
> > > Subject    : x86_64: oprofile doesn't work
> > > References : http://lkml.org/lkml/2006/10/27/3
> > > Submitter  : Prakash Punnoor <prakash@punnoor.de>
> > > Status     : unknown
>
> I hit the same problem on i386 architecture too, if CONFIG_ACPI is not set.
>
> # opcontrol --setup --event=RESOURCE_STALLS:1000 --vmlinux=$VMFILE
> # opcontrol --start
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/enabled: No such file or 
> directory
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/event: No such file or directory
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/count: No such file or directory
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/kernel: No such file or 
> directory
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/user: No such file or directory
> /usr/bin/opcontrol: line 911: /dev/oprofile/0/unit_mask: No such file or 
> directory
> Using 2.6+ OProfile kernel interface.
> Reading module info.
> Using log file /var/lib/oprofile/oprofiled.log
> Daemon started.
> Profiler running.
>
> # ls -l /dev/oprofile/
> total 0
> drwxr-xr-x 1 root root 0 Nov 22 11:18 1
> -rw-r--r-- 1 root root 0 Nov 22 11:18 backtrace_depth
> -rw-r--r-- 1 root root 0 Nov 22 11:18 buffer
> -rw-r--r-- 1 root root 0 Nov 22 11:18 buffer_size
> -rw-r--r-- 1 root root 0 Nov 22 11:18 buffer_watershed
> -rw-r--r-- 1 root root 0 Nov 22 11:18 cpu_buffer_size
> -rw-r--r-- 1 root root 0 Nov 22 11:18 cpu_type
> -rw-rw-rw- 1 root root 0 Nov 22 11:18 dump
> -rw-r--r-- 1 root root 0 Nov 22 11:18 enable
> -rw-r--r-- 1 root root 0 Nov 22 11:18 pointer_size
> drwxr-xr-x 1 root root 0 Nov 22 11:18 stats
> # dmesg | grep oprofile
> oprofile: using NMI interrupt.
> # opcontrol --version
> opcontrol: oprofile 0.9.2 compiled on Nov 22 2006 11:24:09
>
> Eric

You will also need another patch checked into the oprofile cvs last week mentioned:

http://sourceforge.net/mailarchive/message.php?msg_id=35422937

-Will

Index: libop/op_alloc_counter.c
===================================================================
RCS file: /cvsroot/oprofile/oprofile/libop/op_alloc_counter.c,v
retrieving revision 1.6
diff -u -r1.6 op_alloc_counter.c
--- libop/op_alloc_counter.c	1 Oct 2003 21:53:46 -0000	1.6
+++ libop/op_alloc_counter.c	17 Nov 2006 17:03:04 -0000
@@ -130,7 +130,7 @@
 		counter_arc const * arc = list_entry(pos, counter_arc, next);
 
 		if (allocated_mask & (1 << arc->counter))
-			return 0;
+			continue;
 
 		counter_map[depth] = arc->counter;