Jiri Olsa [jo...@redhat.com] wrote:
| On Wed, Sep 24, 2014 at 12:27:15PM -0700, Sukadev Bhattiprolu wrote:
| > From: Cody P Schafer <c...@linux.vnet.ibm.com>
| >
| > Enable event specification like:
| >
| > pmu/event_name,param1=0x1,param2=0x4/
| >
| > Assuming that
| >
| > /sys/bus/event_source/devices/pmu/events/event_name
| >
| > Contains something like
| >
| > param2=foo,bar=1,param1=baz
|
| hum, so what happened to the '?' ... AFAIU from out last discussion,
| you wanted to mark terms which are mandatory and user must provide
| values for them.. and I thought the decision was to have following
| alias record:
|
| $ cat /sys/bus/event_source/devices/pmu/events/event_name
| param2=?,bar=1,param1=?
|
| while perf would scream if any of param1/2 wasnt filled like for:
| pmu/event_name,param1=0x1/
Sorry, I meant to make perf list consistent with sysfs.
Consider these two sysfs entries:
$ cat HPM_0THRD_NON_IDLE_CCYC__PHYS_CORE
domain=0x2,offset=0xe0,starting_index=core,lpar=0x0
$ cat HPM_0THRD_NON_IDLE_CCYC__VCPU_HOME_CORE
domain=0x3,offset=0xe0,starting_index=vcpu,lpar=sibling_guest_id
In the first one, starting_index refers to a 'core' while in the second
it refers to a vcpu. This serves as a "hint" for the parameter's meaning.
By replacing both with 'starting_index=?' we lose that hint.
Should we fix both sysfs and 'perf list' to say
starting_index=?core
Sukadev
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