Perf doesn't accept i915:i915_gem_request_wait_begin as an event
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From: Corey Ashford on 7 Mar 2010 14:10 On 03/07/2010 06:00 AM, Fabian Korak wrote: > Hi, > > I'm currently trying to get the examples at http://dri.freedesktop.org/wiki/IntelPerformanceTuning to run, however when I try > > perf record -f -g -e i915:i915_gem_request_wait_begin -c 1 openarena > > I get the message "invalid or unsupported event: 'i915:i915_gem_request_wait_begin' ". It also isn't listed within perf list. > I'm currently on an up-to-date Fedora Core 14 rawhide with kernel 2.6.34-0.4.rc0.git2. Intel_gpu_tools and libdwarf is installed. > I talked to a few guys on #xorg-devel yesterday and they told me to install kernel-debuginfo, which didn't change anything. > They also told me to run > > nm /lib/modules/2.6.34-0.4.rc0.git2.fc14.x86_64/kernel/drivers/gpu/drm/i915/i915.ko | grep i915_gem > > the output of that can be found here: http://www.pastebin.org/102547 > > Any help would be appreciated. > > thx Fabian Korak > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo(a)vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ I find the example given on that web page quite confusing because perf currently doesn't have support for arch-dependent events like that, except via "raw code" events which use the syntax -e r<hex_code>. I wonder if they locally modified perf to handle those events, and then forgot that they had made that modification before posting up those instructions. I posted a patch last Wednesday that adds arch-dep symbolic event symbol support which uses an external library (like libpfm4), but so far I haven't received any feedback on it. -- Regards, - Corey Corey Ashford Software Engineer IBM Linux Technology Center, Linux Toolchain Beaverton, OR cjashfor(a)us.ibm.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |