On 09/29/2010 12:33 AM, stephane eranian wrote:
> Corey,
>
> Please note that once libpfm4-1.0 is released, I'll post a patch
> to link the perf tool directly with libpfm4. At that point, you will
> not need your little evt2raw program to access any event encoding.
When you say you'll post a patch, did you mean to LKML? I did this
already and it was rejected in favor of a more long-term approach that
uses sysfs for PMU and event naming. All of the details of that system
are still very sketchy, but I don't think you'll be able to get Ingo et
al. to commit such a patch.
>
> What's blocking release 1.0?
>
> 1- add support for OS-specific event attributes
> 2- add Pentium 4 (Netburst) support
>
> For 1, the idea is to allow you to pass attributes which come from the
> OS API and not the HW. For instance, the sampling period, the precise_ip
> mode. The list of OS attributes for each event depends on the OS and the
> event itself. Sometimes, there are several HW attributes which do overlap
> with OS attributes, for instance u, k, precise_ip. The latter is connected to
> PEBS on Intel processors. The u, k in perf_events override those set in
> HW.
>
> The reason 1- is delaying the release is because it may have some implications
> at the user level API of libpfm4.
>
That's interesting, and I can see where that would have use for us as
well. For example, some of our Power-based systems have full
hypervisors and some run the Linux kernel in hypervisor mode.
- Corey
>
> On Wed, Sep 29, 2010 at 9:27 AM, stephane eranian
> <eran...@googlemail.com> wrote:
>> Corey,
>>
>> Patch applied. I tweaked the error messages a bit.
>> Thanks.
>>
>> On Mon, Sep 27, 2010 at 8:15 AM, Corey Ashford
>> <cjash...@linux.vnet.ibm.com> wrote:
>>> Provide a small tool which translates an event string + modifiers to a raw
>>> event code for use with the perf tool.
>>>
>>> This example is very simple and takes a single event string as an argument.
>>>
>>> Signed-off-by: Corey Ashford<cjash...@us.ibm.com>
>>> ---
>>> perf_examples/Makefile | 2 +-
>>> perf_examples/evt2raw.c | 74
>>> +++++++++++++++++++++++++++++++++++++++++++++++
>>> 2 files changed, 75 insertions(+), 1 deletions(-)
>>> create mode 100644 perf_examples/evt2raw.c
>>>
>>> diff --git a/perf_examples/Makefile b/perf_examples/Makefile
>>> index 1d353d4..8ebb290 100644
>>> --- a/perf_examples/Makefile
>>> +++ b/perf_examples/Makefile
>>> @@ -55,7 +55,7 @@ ifeq ($(SYS),Linux)
>>> LPC_UTILS=perf_util.o
>>> TARGETS+=self self_basic self_count task task_attach_timeout syst \
>>> notify_self notify_group task_smpl self_smpl_multi \
>>> - self_pipe syst_count task_cpu syst_smpl
>>> + self_pipe syst_count task_cpu syst_smpl evt2raw
>>>
>>> #XTRA += rtop
>>> endif
>>> diff --git a/perf_examples/evt2raw.c b/perf_examples/evt2raw.c
>>> new file mode 100644
>>> index 0000000..917420f
>>> --- /dev/null
>>> +++ b/perf_examples/evt2raw.c
>>> @@ -0,0 +1,74 @@
>>> +/*
>>> + * evt2raw.c - example which converts an event string (event + modifiers)
>>> to
>>> + * a raw event code usable by the perf tool.
>>> + *
>>> + * Copyright (c) 2010 IBM Corp.
>>> + * Contributed by Corey Ashford<cjash...@us.ibm.com>
>>> + *
>>> + * Permission is hereby granted, free of charge, to any person obtaining a
>>> copy
>>> + * of this software and associated documentation files (the "Software"),
>>> to deal
>>> + * in the Software without restriction, including without limitation the
>>> rights
>>> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or
>>> sell copies
>>> + * of the Software, and to permit persons to whom the Software is
>>> furnished to do so,
>>> + * subject to the following conditions:
>>> + *
>>> + * The above copyright notice and this permission notice shall be included
>>> in all
>>> + * copies or substantial portions of the Software.
>>> + *
>>> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
>>> OR IMPLIED,
>>> + * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
>>> FOR A
>>> + * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
>>> OR COPYRIGHT
>>> + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
>>> AN ACTION OF
>>> + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH
>>> THE SOFTWARE
>>> + * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
>>> + */
>>> +#include<stdio.h>
>>> +#include<stdlib.h>
>>> +#include<unistd.h>
>>> +#include<perfmon/pfmlib_perf_event.h>
>>> +
>>> +static void
>>> +usage(void)
>>> +{
>>> + printf("usage: evt2raw<event>\n"
>>> + "<event> is the symbolic event, including modifiers, to "
>>> + "translate to a raw code.\n");
>>> +}
>>> +
>>> +int
>>> +main(int argc, char **argv)
>>> +{
>>> + int ret;
>>> + struct perf_event_attr pea;
>>> + char *event_str;
>>> +
>>> + if (argc != 2) {
>>> + usage();
>>> + return 1;
>>> + }
>>> + event_str = argv[1];
>>> +
>>> + ret = pfm_initialize();
>>> + if (ret != PFM_SUCCESS) {
>>> + printf("Internal error: pfm_initialize returned %s\n",
>>> + pfm_strerror(ret));
>>> + return 1;
>>> + }
>>> +
>>> + ret = pfm_get_perf_event_encoding(event_str, PFM_PLM0|PFM_PLM3,&pea,
>>> + NULL, NULL);
>>> + if (ret != PFM_SUCCESS) {
>>> + printf("Error: pfm_get_perf_encoding returned %s\n",
>>> + pfm_strerror(ret));
>>> + return 1;
>>> + }
>>> +
>>> + if (pea.type != PERF_TYPE_RAW) {
>>> + printf("Error: %s is not a raw hardware event\n",
>>> event_str);
>>> + return 1;
>>> + }
>>> +
>>> + printf("r%llx\n", pea.config);
>>> +
>>> + return 0;
>>> +}
>>> --
>>> 1.7.0.4
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Start uncovering the many advantages of virtual appliances
>>> and start using them to simplify application deployment and
>>> accelerate your shift to cloud computing.
>>> http://p.sf.net/sfu/novell-sfdev2dev
>>> _______________________________________________
>>> perfmon2-devel mailing list
>>> perfmon2-devel@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
>>>
>>
------------------------------------------------------------------------------
Start uncovering the many advantages of virtual appliances
and start using them to simplify application deployment and
accelerate your shift to cloud computing.
http://p.sf.net/sfu/novell-sfdev2dev
_______________________________________________
perfmon2-devel mailing list
perfmon2-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
