One scenario under recent discussion is that of having a thundering herd
in i915_wait_request - where the overhead of waking up every waiter for
every batchbuffer was significantly impacting customer throughput. This
benchmark tries to replicate something to that effect by having a large
number of consumers generating a busy load (a large copy followed by
lots of small copies to generate lots of interrupts) and tries to wait
upon all the consumers concurrenctly (to reproduce the thundering herd
effect). To measure the overhead, we have a bunch of cpu hogs - less
kernel overhead in waiting should allow more CPU throughput.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Now that we actually install the benchmarks into a sane location,
slightly abuse it to put the tracer for gem_exec_trace alongside.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This slightly idealises the behaviour of clients with the aim of
measuring the kernel overhead of different workloads. This test focuses
on the cost of relocating batchbuffers.
A trace file is generated with an LD_PRELOAD intercept around
execbuffer, which we can then replay at our leisure. The replay replaces
the real buffers with a set of empty ones so the only thing that the
kernel has to do is parse the relocations. but without a real workload
we lose the impact of having to rewrite active buffers.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Add an optional dependency on libunwind to print stack traces when a
test assertion fails.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>
They build fine so give them some exposure.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>
We should get more kms tests soon, and not needing to copy-paste a
nice test pattern should be useful.
That establishes a firm depency of i-g-t on cairo over everything, but
I don't care so much about that.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Fixes Solaris build error on build of intel_upload_blit_large:
Undefined first referenced
symbol in file
pci_device_probe ../lib/.libs/libintel_tools.a(intel_pci.o) (symbol belongs to implicit dependency libpciaccess.so.0)
pci_system_init ../lib/.libs/libintel_tools.a(intel_pci.o) (symbol belongs to implicit dependency libpciaccess.so.0)
pci_device_find_by_slot ../lib/.libs/libintel_tools.a(intel_pci.o) (symbol belongs to implicit dependency libpciaccess.so.0)
ld: fatal: symbol referencing errors. No output written to intel_upload_blit_large
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Headers are found under top_srcdir/...
Haeders are CPP flags, not C Flags
AM_CPPFLAGS, AM_CFLAGS and LDAAD apply to all targets.
libintel_tools.la is located in top_builddir.
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Use CWARNFLAGS as in all of xorg. There seems to be no reason why this
module should be different. The warnings were updated recently
for those who install the latest util-macros.
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
A few of the tools can be performed post-mortem from a different system,
so it is useful to be able to compile those tools on those foreign
systems. Obviously, any program to interact with the PCI device or talk
to GEM will fail on a non-Intel system.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
