1) perf build ============= The perf build process consists of several separated building blocks, which are linked together to form the perf binary: - libperf library (static) - perf builtin commands - traceevent library (static) - GTK ui library Several makefiles govern the perf build: - Makefile top level Makefile working as a wrapper that calls the main Makefile.perf with a -j option to do parallel builds. - Makefile.perf main makefile that triggers build of all perf objects including installation and documentation processing. - tools/build/Makefile.build main makefile of the build framework - tools/build/Build.include build framework generic definitions - Build makefiles makefiles that defines build objects Please refer to tools/build/Documentation/Build.txt for more information about build framework. 2) perf build ============= The Makefile.perf triggers the build framework for build objects: perf, libperf, gtk resulting in following objects: $ ls *-in.o gtk-in.o libperf-in.o perf-in.o Those objects are then used in final linking: libperf-gtk.so <- gtk-in.o libperf-in.o perf <- perf-in.o libperf-in.o NOTE this description is omitting other libraries involved, only focusing on build framework outcomes net-next plumbingsTobias Klauser
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /tools/perf/tests/sample-parsing.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/tests/sample-parsing.c')