* [dpdk-dev] Forcing inlining for igb_uio and kni @ 2019-06-11 8:45 ` David Marchand 2019-06-11 9:31 ` Ilya Maximets 0 siblings, 1 reply; 6+ messages in thread From: David Marchand @ 2019-06-11 8:45 UTC (permalink / raw) To: Yigit, Ferruh Cc: dev, Bruce Richardson, Ian Stokes, Ilya Maximets, Aaron Conole I noticed that OVS CI [1] patches the dpdk sources to force some inlining parameters and get kni and igb_uio to build fine. Looking at it in dpdk, meson support dropped this. In the makefiles, I can't find a reason in the git history (we go back to 1.3.0rX version). [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100 kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50 [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/igb_uio/Makefile |grep max-inline-insns-single 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100 [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/kni/Makefile |grep max-inline-insns-single 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50 Is there a valid reason to keep this? 1: https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81 -- David Marchand ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] Forcing inlining for igb_uio and kni 2019-06-11 8:45 ` [dpdk-dev] Forcing inlining for igb_uio and kni David Marchand @ 2019-06-11 9:31 ` Ilya Maximets 2019-06-11 9:44 ` David Marchand 0 siblings, 1 reply; 6+ messages in thread From: Ilya Maximets @ 2019-06-11 9:31 UTC (permalink / raw) To: David Marchand, Yigit, Ferruh Cc: dev, Bruce Richardson, Ian Stokes, Aaron Conole, ovs-dev On 11.06.2019 11:45, David Marchand wrote: > I noticed that OVS CI [1] patches the dpdk sources to force some inlining parameters and get kni and igb_uio to build fine. > > Looking at it in dpdk, meson support dropped this. > In the makefiles, I can't find a reason in the git history (we go back to 1.3.0rX version). > > [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single > kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100 > kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50 > [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/igb_uio/Makefile |grep max-inline-insns-single > 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100 > [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/kni/Makefile |grep max-inline-insns-single > 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50 > > Is there a valid reason to keep this? > 1: https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81 <https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c4806461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81> Hi, David. I don't know the reason for these in OVS travis config, But we don't need to know them, actually. I have a patch to drop all the kernel related stuff from the DPDK build in OVS Travis checks, just didn't send it yet. Will send soon, probably. If (or when) OVS Travis will migrate to meson, I'd suggest to just use '-Denable_kmods=false'. Best regards, Ilya Maximets. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] Forcing inlining for igb_uio and kni 2019-06-11 9:31 ` Ilya Maximets @ 2019-06-11 9:44 ` David Marchand 2019-06-11 10:18 ` Bruce Richardson 0 siblings, 1 reply; 6+ messages in thread From: David Marchand @ 2019-06-11 9:44 UTC (permalink / raw) To: Ilya Maximets Cc: dev, Bruce Richardson, Ian Stokes, Aaron Conole, ovs-dev, Yigit, Ferruh On Tue, Jun 11, 2019 at 11:31 AM Ilya Maximets <i.maximets@samsung.com> wrote: > On 11.06.2019 11:45, David Marchand wrote: > > I noticed that OVS CI [1] patches the dpdk sources to force some > inlining parameters and get kni and igb_uio to build fine. > > > > Looking at it in dpdk, meson support dropped this. > > In the makefiles, I can't find a reason in the git history (we go back > to 1.3.0rX version). > > > > [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single > > kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=100 > > kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=50 > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > kernel/linux/igb_uio/Makefile |grep max-inline-insns-single > > 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel > 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=100 > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > kernel/linux/kni/Makefile |grep max-inline-insns-single > > 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel > 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=50 > > > > Is there a valid reason to keep this? > > 1: > https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81 > < > https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c4806461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81 > > > > Hi, David. > I don't know the reason for these in OVS travis config, But we don't > need to know them, actually. I have a patch to drop all the kernel > related stuff from the DPDK build in OVS Travis checks, just didn't > send it yet. Will send soon, probably. > I had this in mind since we don't need those kmods in the CI. Thanks Ilya. The question on dpdk side remains open :-). -- David Marchand ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] Forcing inlining for igb_uio and kni 2019-06-11 9:44 ` David Marchand @ 2019-06-11 10:18 ` Bruce Richardson 2019-06-11 14:25 ` Stephen Hemminger 0 siblings, 1 reply; 6+ messages in thread From: Bruce Richardson @ 2019-06-11 10:18 UTC (permalink / raw) To: David Marchand Cc: Ilya Maximets, dev, Ian Stokes, Aaron Conole, ovs-dev, Yigit, Ferruh On Tue, Jun 11, 2019 at 11:44:01AM +0200, David Marchand wrote: > On Tue, Jun 11, 2019 at 11:31 AM Ilya Maximets > <[1]i.maximets@samsung.com> wrote: > > On 11.06.2019 11:45, David Marchand wrote: > > I noticed that OVS CI [1] patches the dpdk sources to force some > inlining parameters and get kni and igb_uio to build fine. > > > > Looking at it in dpdk, meson support dropped this. > > In the makefiles, I can't find a reason in the git history (we go > back to 1.3.0rX version). > > > > [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single > > kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=100 > > kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=50 > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > kernel/linux/igb_uio/Makefile |grep max-inline-insns-single > > 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel > 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=100 > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > kernel/linux/kni/Makefile |grep max-inline-insns-single > > 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel > 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param > max-inline-insns-single=50 > > > > Is there a valid reason to keep this? > > 1: > [2]https://github.com/openvswitch/ovs/blob/master/.travis/linux-buil > d.sh#L81 > <[3]https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c48 > 06461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.trav > is/linux-build.sh#L81> > Hi, David. > I don't know the reason for these in OVS travis config, But we don't > need to know them, actually. I have a patch to drop all the kernel > related stuff from the DPDK build in OVS Travis checks, just didn't > send it yet. Will send soon, probably. > > I had this in mind since we don't need those kmods in the CI. > Thanks Ilya. > The question on dpdk side remains open :-). > -- > David Marchand I know that previously we did have issues with the modules not compiling due to errors about maximum levels of inlines. Whether that was because of the compiler, or the kernel makefiles at the time, I'm not sure. The kmods seem to build fine for me now without the parameters, and the fact that there has never been a problem reported with building using meson either, probably indicates that the extra compiler flags can be dropped. /Bruce ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] Forcing inlining for igb_uio and kni 2019-06-11 10:18 ` Bruce Richardson @ 2019-06-11 14:25 ` Stephen Hemminger 2019-06-11 14:36 ` Bruce Richardson 0 siblings, 1 reply; 6+ messages in thread From: Stephen Hemminger @ 2019-06-11 14:25 UTC (permalink / raw) To: Bruce Richardson Cc: David Marchand, Ilya Maximets, dev, Ian Stokes, Aaron Conole, ovs-dev, Yigit, Ferruh On Tue, 11 Jun 2019 11:18:22 +0100 Bruce Richardson <bruce.richardson@intel.com> wrote: > On Tue, Jun 11, 2019 at 11:44:01AM +0200, David Marchand wrote: > > On Tue, Jun 11, 2019 at 11:31 AM Ilya Maximets > > <[1]i.maximets@samsung.com> wrote: > > > > On 11.06.2019 11:45, David Marchand wrote: > > > I noticed that OVS CI [1] patches the dpdk sources to force some > > inlining parameters and get kni and igb_uio to build fine. > > > > > > Looking at it in dpdk, meson support dropped this. > > > In the makefiles, I can't find a reason in the git history (we go > > back to 1.3.0rX version). > > > > > > [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single > > > kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > > max-inline-insns-single=100 > > > kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > > max-inline-insns-single=50 > > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > > kernel/linux/igb_uio/Makefile |grep max-inline-insns-single > > > 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel > > 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param > > max-inline-insns-single=100 > > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > > kernel/linux/kni/Makefile |grep max-inline-insns-single > > > 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel > > 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param > > max-inline-insns-single=50 > > > > > > Is there a valid reason to keep this? > > > 1: > > [2]https://github.com/openvswitch/ovs/blob/master/.travis/linux-buil > > d.sh#L81 > > <[3]https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c48 > > 06461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.trav > > is/linux-build.sh#L81> > > Hi, David. > > I don't know the reason for these in OVS travis config, But we don't > > need to know them, actually. I have a patch to drop all the kernel > > related stuff from the DPDK build in OVS Travis checks, just didn't > > send it yet. Will send soon, probably. > > > > I had this in mind since we don't need those kmods in the CI. > > Thanks Ilya. > > The question on dpdk side remains open :-). > > -- > > David Marchand > > I know that previously we did have issues with the modules not compiling > due to errors about maximum levels of inlines. Whether that was because of > the compiler, or the kernel makefiles at the time, I'm not sure. The kmods > seem to build fine for me now without the parameters, and the fact that > there has never been a problem reported with building using meson either, > probably indicates that the extra compiler flags can be dropped. > > /Bruce I really doubt forcing inlining makes any difference to the performance. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [dpdk-dev] Forcing inlining for igb_uio and kni 2019-06-11 14:25 ` Stephen Hemminger @ 2019-06-11 14:36 ` Bruce Richardson 0 siblings, 0 replies; 6+ messages in thread From: Bruce Richardson @ 2019-06-11 14:36 UTC (permalink / raw) To: Stephen Hemminger Cc: David Marchand, Ilya Maximets, dev, Ian Stokes, Aaron Conole, ovs-dev, Yigit, Ferruh On Tue, Jun 11, 2019 at 07:25:09AM -0700, Stephen Hemminger wrote: > On Tue, 11 Jun 2019 11:18:22 +0100 > Bruce Richardson <bruce.richardson@intel.com> wrote: > > > On Tue, Jun 11, 2019 at 11:44:01AM +0200, David Marchand wrote: > > > On Tue, Jun 11, 2019 at 11:31 AM Ilya Maximets > > > <[1]i.maximets@samsung.com> wrote: > > > > > > On 11.06.2019 11:45, David Marchand wrote: > > > > I noticed that OVS CI [1] patches the dpdk sources to force some > > > inlining parameters and get kni and igb_uio to build fine. > > > > > > > > Looking at it in dpdk, meson support dropped this. > > > > In the makefiles, I can't find a reason in the git history (we go > > > back to 1.3.0rX version). > > > > > > > > [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single > > > > kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > > > max-inline-insns-single=100 > > > > kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param > > > max-inline-insns-single=50 > > > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > > > kernel/linux/igb_uio/Makefile |grep max-inline-insns-single > > > > 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel > > > 2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param > > > max-inline-insns-single=100 > > > > [dmarchan@dmarchan dpdk]$ git blame origin/master -- > > > kernel/linux/kni/Makefile |grep max-inline-insns-single > > > > 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel > > > 2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param > > > max-inline-insns-single=50 > > > > > > > > Is there a valid reason to keep this? > > > > 1: > > > [2]https://github.com/openvswitch/ovs/blob/master/.travis/linux-buil > > > d.sh#L81 > > > <[3]https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c48 > > > 06461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.trav > > > is/linux-build.sh#L81> > > > Hi, David. > > > I don't know the reason for these in OVS travis config, But we don't > > > need to know them, actually. I have a patch to drop all the kernel > > > related stuff from the DPDK build in OVS Travis checks, just didn't > > > send it yet. Will send soon, probably. > > > > > > I had this in mind since we don't need those kmods in the CI. > > > Thanks Ilya. > > > The question on dpdk side remains open :-). > > > -- > > > David Marchand > > > > I know that previously we did have issues with the modules not compiling > > due to errors about maximum levels of inlines. Whether that was because of > > the compiler, or the kernel makefiles at the time, I'm not sure. The kmods > > seem to build fine for me now without the parameters, and the fact that > > there has never been a problem reported with building using meson either, > > probably indicates that the extra compiler flags can be dropped. > > > > /Bruce > > I really doubt forcing inlining makes any difference to the performance. I agree, especially for uio module. This was not a "perf" issue, but a "just own't compile" issue, IIRC. :-) That being said, given that this is just a line in two makefiles, the rule about "if it ain't broke" may apply.... ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-06-11 14:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <CGME20190611084549epcas5p42a1a9b787cf71df23f18ebaf4092beaa@epcas5p4.samsung.com>
2019-06-11 8:45 ` [dpdk-dev] Forcing inlining for igb_uio and kni David Marchand
2019-06-11 9:31 ` Ilya Maximets
2019-06-11 9:44 ` David Marchand
2019-06-11 10:18 ` Bruce Richardson
2019-06-11 14:25 ` Stephen Hemminger
2019-06-11 14:36 ` Bruce Richardson
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).