- 20 12月, 2011 1 次提交
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由 Robert Richter 提交于
If oprofilefs_ulong_from_user() is called with count equals zero, *val remains unchanged. Depending on the implementation it might be uninitialized. Change oprofilefs_ulong_from_user()'s interface to return count on success. Thus, we are able to return early if count equals zero which avoids using *val uninitialized. Fixing all users of oprofilefs_ulong_ from_user(). This follows write syscall implementation when count is zero: "If count is zero ... [and if] no errors are detected, 0 will be returned without causing any other effect." (man 2 write) Reported-By: NMike Waychison <mikew@google.com> Signed-off-by: NRobert Richter <robert.richter@amd.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@vger.kernel.org> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Link: http://lkml.kernel.org/r/20111219153830.GH16765@erda.amd.comSigned-off-by: NIngo Molnar <mingo@elte.hu>
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- 22 6月, 2011 2 次提交
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由 Christian Borntraeger 提交于
The sampling interval for the hardware sampler is specified in cycles. (see SA23-2260-01 The Load-Program-Parameter and the CPU-Measurement Facilities) The current default value will therefore result in millions of samples. This patch changes the default sampling interval to 4M, which will result in ~1500 samples per second on a z196 reducing the overhead of sampling. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Christian Borntraeger 提交于
On specific configurations with hwsampler opcontrol --start returns an error on "echo 1 >/dev/oprofile/enable". Turns out that the hw sampling interval is not checked against the hardware limits. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 20 6月, 2011 1 次提交
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由 Vitaliy Ivanov 提交于
Many stupid corrections of duplicated includes based on the output of scripts/checkincludes.pl. Signed-off-by: NVitaliy Ivanov <vitalivanov@gmail.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 10 5月, 2011 1 次提交
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由 Martin Schwidefsky 提交于
oprofile_min_interval and oprofile_max_interval are unsigned, checking for negative values doesn't work. Change hwsampler_query_min_interval and hwsampler_query_max_interval to return an unsigned long and check for a zero value instead. Reported-by: NNicolas Kaiser <nikai@nikai.net> Acked-by: NRobert Richter <robert.richter@amd.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 23 3月, 2011 1 次提交
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由 Heiko Carstens 提交于
Doesn't work and build for CONFIG_32BIT. So disable it. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 16 3月, 2011 2 次提交
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由 Robert Richter 提交于
Remove unused HAVE_HWSAMPLER config option. It is not used anymore, removing it. Also make some functions static and some coding style fixes. Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Heinz Graalfs 提交于
Merge the contents of hwsampler_files.c into arch/s390/oprofile/init.c. Signed-off-by: NMahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: NHeinz Graalfs <graalfs@linux.vnet.ibm.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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- 15 2月, 2011 2 次提交
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由 Robert Richter 提交于
This patch is a rework of the hwsampler oprofile implementation that has been applied recently. Now there are less non-architectural changes. The only changes are: * introduction of oprofile_add_ext_hw_sample(), and * removal of section attributes of oprofile_timer_init/_exit(). To setup hwsampler for oprofile we need to modify start()/stop() callbacks and additional hwsampler control files in oprofilefs. We do not reinitialize the timer or hwsampler mode by restarting calling init/exit() anymore, instead hwsampler_running is used to switch the mode directly in oprofile_hwsampler_start/_stop(). For locking reasons there is also hwsampler_file that reflects the value in oprofilefs. The overall diffstat of the oprofile s390 hwsampler implemenation shows the low impact to non-architectural code: arch/Kconfig | 3 + arch/s390/Kconfig | 1 + arch/s390/oprofile/Makefile | 2 +- arch/s390/oprofile/hwsampler.c | 1256 ++++++++++++++++++++++++++++++++++ arch/s390/oprofile/hwsampler.h | 113 +++ arch/s390/oprofile/hwsampler_files.c | 162 +++++ arch/s390/oprofile/init.c | 6 +- drivers/oprofile/cpu_buffer.c | 24 +- drivers/oprofile/timer_int.c | 4 +- include/linux/oprofile.h | 7 + 10 files changed, 1567 insertions(+), 11 deletions(-) Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Heinz Graalfs 提交于
OProfile is enhanced to export all files for controlling System z's hardware sampling, and to invoke hwsampler exported functions to initialize and use System z's hardware sampling. The patch invokes hwsampler_setup() during oprofile init and exports following hwsampler files under oprofilefs if hwsampler's setup succeeded: A new directory for hardware sampling based files /dev/oprofile/hwsampling/ The userland daemon must explicitly write to the following files to disable (or enable) hardware based sampling /dev/oprofile/hwsampling/hwsampler to modify the actual sampling rate /dev/oprofile/hwsampling/hw_interval to modify the amount of sampling memory (measured in 4K pages) /dev/oprofile/hwsampling/hw_sdbt_blocks The following files are read only and show the possible minimum sampling rate /dev/oprofile/hwsampling/hw_min_interval the possible maximum sampling rate /dev/oprofile/hwsampling/hw_max_interval The patch splits the oprofile_timer_[init/exit] function so that it can be also called through user context (oprofilefs) to avoid kernel oops. Applied with following changes: * whitespace changes in Makefile and timer_int.c Signed-off-by: NMahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: NMaran Pakkirisamy <maranp@linux.vnet.ibm.com> Signed-off-by: NHeinz Graalfs <graalfs@linux.vnet.ibm.com> Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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- 07 1月, 2006 1 次提交
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由 Andreas Krebbel 提交于
Signed-off-by: NAndreas Krebbel <krebbel1@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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