[dpdk-dev] [PATCH v3] libs/power: add p-state driver compatibility

[Luca Boccassi]

On Thu, 2018-12-20 at 11:10 +0100, Thomas Monjalon wrote:
> 20/12/2018 10:33, Burakov, Anatoly:
> > On 20-Dec-18 9:25 AM, Burakov, Anatoly wrote:
> > > On 19-Dec-18 8:31 PM, Thomas Monjalon wrote:
> > > > 19/12/2018 10:09, Hunt, David:
> > > > > On 19/12/2018 3:18 AM, Thomas Monjalon wrote:
> > > > > > 14/12/2018 14:11, Liang Ma:
> > > > > > > Previously, in order to use the power library, it was
> > > > > > > necessary
> > > > > > > for the user to disable the intel_pstate driver by adding
> > > > > > > “intel_pstate=disable” to the kernel command line for the
> > > > > > > system,
> > > > > > > which causes the acpi_cpufreq driver to be loaded in its
> > > > > > > place.
> > > > > > > 
> > > > > > > This patch adds the ability for the power library use the
> > > > > > > intel-pstate
> > > > > > > driver.
> > > > > > > 
> > > > > > > It adds a new suite of functions behind the current power
> > > > > > > library API,
> > > > > > > and will seamlessly set up the user facing API function
> > > > > > > pointers to
> > > > > > > the relevant functions depending on whether the system is
> > > > > > > running with
> > > > > > > acpi_cpufreq kernel driver, intel_pstate kernel driver or
> > > > > > > in a guest,
> > > > > > > using kvm. The library API and ABI is unchanged.
> > > > > > > 
> > > > > > > Signed-off-by: Liang Ma <liang.j.ma at intel.com>
> > > > > > > 
> > > > > > > Reviewed-by: Anatoly Burakov <anatoly.burakov at intel.com>
> > > > > > > ---
> > > > > > 
> > > > > > Please write a changelog when sending a new version.
> > > > > > 
> > > > > > Dave, any comment on this patch?
> > > > > 
> > > > > 
> > > > > Looks good to me.
> > > > > 
> > > > > Acked-by: David Hunt <david.hunt at intel.com>
> > > > > 
> > > > > 
> > > > > > > --- /dev/null
> > > > > > > +++ b/lib/librte_power/power_pstate_cpufreq.c
> > > > > > > @@ -0,0 +1,770 @@
> > > > > > > +/* SPDX-License-Identifier: BSD-3-Clause
> > > > > > > + * Copyright(c) 2018-2018 Intel Corporation
> > > > > > 
> > > > > > Something wrong here :)
> > > > > 
> > > > > Yes, should simply be "Copyright(c) 2018 Intel Corporation"
> > > > 
> > > > 
> > > > There is also a compilation error with meson:
> > > > 
> > > > lib/librte_power/rte_power_empty_poll.h:20:10: fatal error:
> > > >     rte_timer.h: No such file or directory
> > > 
> > > That's an EAL header, and this file was not modified or
> > > referenced in 
> > > this commit. This sounds like a pre-existing problem (with meson 
> > > build-system?), not related to the patchset.
> > > 
> > > Is this library not built by default by our patch compilation CI?
> > > 
> > 
> > Disregard that, the patch has a bug in meson build file.
> > 
> > Still, why doesn't our CI build meson?
> 
> I think we should build a new CI for compilation testing.
> Luca proposed to use OBS.
> Luca, can we work on it?

https://build.opensuse.org/package/show/home:bluca:dpdk/dpdk

The Debian/Ubuntu builds use Meson, the Fedora/CentOS/RHEL/SUSE ones
use the makefiles.

More complexity (eg: building with both on all distros) can be added
with a bit of work, if required and if it's worth it.

A postreceive curl call can be added to trigger it on every push to
master. Emails on failure can be sent with the logs.

-- 
Kind regards,
Luca Boccassi