Pull turbostat utility changes for 4.18-rc2 from Len Brown.
"This includes two regression fixes, plus a couple more random, but
worthy, patches."
* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: version 18.06.20
tools/power turbostat: add the missing command line switches
tools/power turbostat: add single character tokens to help
tools/power turbostat: alphabetize the help output
tools/power turbostat: fix segfault on 'no node' machines
tools/power turbostat: add optional APIC X2APIC columns
tools/power turbostat: decode cpuid.1.HT
tools/power turbostat: fix show/hide issues resulting from mis-merge
Document the missing command line tokens in the help() function.
Signed-off-by: Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Improve the help() output by adding the single character
tokens (e.g -a).
Signed-off-by: Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Sort the command line arguments output of help() in
alphabetical order in line with other linux tools.
Signed-off-by: Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Running turbostat on machines that don't expose nodes
in sysfs (no /sys/bus/node) causes a segfault or a -nan
value diesplayed in the log. This is caused by
physical_node_id being reported as -1 and logical_node_id
being calculated as a negative number resulting in the new
GET_THREAD/GET_CORE returning an incorrect address.
Signed-off-by: Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Add APIC and X2APIC columns to the topology section.
They are disabled-by-default -- enable like so:
--debug
or
--enable APIC,X2APIC
Signed-off-by: Len Brown <len.brown@intel.com>
The --show and --hide options failed on "Node", which was listed as "Node%".
The --show and --hide options were generally fouled-up do due to come
content merges that scrambled the list of column name indexes.
Signed-off-by: Len Brown <len.brown@intel.com>
As we move stuff around, some doc references are broken. Fix some of
them via this script:
./scripts/documentation-file-ref-check --fix
Manually checked if the produced result is valid, removing a few
false-positives.
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
This cpupower update for 4.18-rc1 consists of two minor fixes.
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Merge tag 'linux-cpupower-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux
Pull cpupower updates for v4.18-rc1 from Shuah Khan:
"This cpupower update for 4.18-rc1 consists of two minor fixes."
* tag 'linux-cpupower-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux:
cpupower : Fix header name to read idle state name
cpupower: fix spelling mistake: "logilename" -> "logfilename"
Output a Node column if there is more than one node/socket.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The previous patches have added node information to turbostat, but the
counters code does not take it into account.
Add node information from cpu_topology calculations to turbostat
counters.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Cleanup, remove num_ from num_nodes_per_pkg, num_cores_per_node, and
num_threads_per_node.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
turbostat incorrectly assumes that there is one node per package. As a
result num_cores_per_pkg is not correctly named and is actually
num_cores_per_node.
Rename num_cores_per_pkg to num_cores_per_node.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The code can be simplified if the cpu_topology *cpus tracks the thread
IDs. This removes an additional file lookup and simplifies the counter
initialization code.
Add thread ID to cpu_topology information and cleanup the counter
initialization code.
v2: prevent thread_id from being overwritten
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The code currently assumes each package has exactly one node. This is not
the case for AMD systems and Intel systems with COD. AMD systems also
may re-enumerate each node's core IDs starting at 0 (for example, an AMD
processor may have two nodes, each with core IDs from 0 to 7). In order
to properly enumerate the cores we need to track both the physical and
logical node IDs.
Add physical_node_id to track the node ID assigned by the kernel, and
logical_node_id used by turbostat to track the nodes per package ie) a
0-based count within the package.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The turbostat code only looks at thread_siblings_list to determine if
processing units/threads are on the same the core. This works well on
Intel systems which have a shared L1 instruction and data cache. This
does not work on AMD systems which have shared L1 instruction cache but
separate L1 data caches. Other utilities also check sibling's core ID
to determine if the processing unit shares the same core.
Additionally, the cpu_topology *cpus list used in topology_probe() can
be used elsewhere in the code to simplify things.
Export *cpus to the entire turbostat code, and add Processing Unit/Thread
IDs information to each cpu_topology struct. Confirm that the thread
is on the same core as indicated by thread_siblings_list.
[v2]: Fixup CPU_* usage that caused gcc malloc error.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Future fixes will use sysfs files that contain cpumask output. The code
needs to know the length of the cpumask in order to determine which cpus
are set in a cpumask. Currently topo.max_cpu_num is the maximum cpu
number. It can be increased the the maximum value of cpus represented in
cpumasks.
Set max_num_cpus to the length of a cpumask.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
There's a use case during test to only print specific round of iterations
if --num_iterations is specified, for example, with this patch applied:
turbostat -i 5 -n 4
will capture 4 samples with 5 seconds interval.
[lenb: renamed to --num_iterations from --iterations]
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Reviewed-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
All MSRs related to turbostat are same as Kabylake.
Even though SDM claims that core C3 residency can be read from MSR 0x662,
the read on this MSR fails on CNL platform. Hence disabled C3 MSR read
and display.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The SNB_C1_AUTO_UNDEMOTE definition should have been deleted once
it was copied into msr-index.h. One copy of the truth is better --
particularly when Matt needs to fix it:-)
Signed-off-by: Len Brown <len.brown@intel.com>
According to the Intel Software Developers' Manual, Vol. 4, Order No.
335592, these macros have been reversed since they were added.
Fixes: 889facbee3 ("tools/power turbostat: v3.0: monitor Watts and Temperature")
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Like the "C1" and "C1%" column, the new POLL and POLL% columns
show invocations and residency% during the measurement interval.
While it didn't seem important to track in the past,
we've recently found some Linux cpuidle bugs related to POLL%.
Signed-off-by: Len Brown <len.brown@intel.com>
The column header for PC10 residency is "Pk%pc10"
This is missing the 'g' that others have, eg Pkg%pc6,
to allow tab-delimited columns to fit into 8-columns.
However, --hide Pk%pc10 did not work, it was still looking for the 'g'.
This was confusing, because --list shows the correct "Pk%pc10"
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Linux 4.15 exports the ACPI Low Power Idle Table's
counters in /sys/devices/system/cpu/cpuidle/
low_power_idle_cpu_residency_us
Show this in the "CPU%LPI" column.
Today this reflects the "North Complex"
residency in PC10, so expect it to
closely follow "Pk%pc10".
low_power_idle_system_residency_us
Show this in the "SYS%LPI" column.
Today, this reflects the North is in PC10,
plus the PCH is sufficiently quiescent
to save additional power via the "S0ix"
system state, as measured by the
PCH SLP_S0 counter.
Signed-off-by: Len Brown <len.brown@intel.com>
rpm-lint flagged these as being executable:
kernel-tools.x86_64: W: spurious-executable-perm /usr/share/man/man8/turbostat.8.gz
kernel-tools.x86_64: W: spurious-executable-perm /usr/share/man/man8/x86_energy_perf_policy.8.gz
Fix this
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
When the user reuests to collect and show columns
that are not present on every row (eg. for every CPU)
turbostat still prints an (empty) line for every CPU.
Update so no blank lines are printed.
old:
# turbostat --quiet --show Pkg%pc6
Pkg%pc6
9.12
9.12
Pkg%pc6
9.12
9.12
new:
# turbostat --quiet --show Pkg%pc6
Pkg%pc6
9.12
9.12
Pkg%pc6
9.12
9.12
Reported-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Improve readability a little bit by changing this output:
MSR_PKG_CST_CONFIG_CONTROL: 0x00008407 (locked: pkg-cstate-limit=7: unlimited, automatic-c-state-conversion=off)
with this output:
MSR_PKG_CST_CONFIG_CONTROL: 0x00008407 (locked, pkg-cstate-limit=7 (unlimited), automatic-c-state-conversion=off)
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
BDX and SKX have a bit that tells them to PROMOTE shallow
C-states requests to MWAIT(C6). It is generally a BIOS bug
if this bit is set. As we have encountered that BIOS bug,
let's print this bit in turbostat debug output.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Some SKX use a 24 MHz crystal, so do not hard code 25 MHz.
Also, SKX crystal is not exact, because SKX uses an EMI reduction
circuit that costs a fraction of a percent.
Signed-off-by: Len Brown <len.brown@intel.com>
MSR_IA32_MISC_ENABLE[18] is the MWAIT ENABLE bit, not DISABLE bit...
so
MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST No-MWAIT PREFETCH TURBO)
should print as:
MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT PREFETCH TURBO)
Signed-off-by: Len Brown <len.brown@intel.com>
The recent patch that implements table printing on a keypress introduced a
regression - turbostat prints the table almost continuously if it is run from a
daemon program.
The problem is also easy to reproduce like this:
echo | turbostat
The reason is that we cannot assume that stdin is always a TTY. It can be many
things.
This patch adds fixes the problem by limiting the new keypress functionality to
TTYs only. If stdin is not a TTY, we just sleep for the full interval time.
While on it, clean-up 'do_sleep()' to return no value, as callers do not expect
that anyway.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
In turbostat interval mode, a newline typed on standard input
will now conclude the current interval. Data will immediately
be collected and printed for that interval, and the next interval
will be started.
This is similar to the recently added SIGUSR1 feature.
But that is for use by programs, while this is for interactive use.
Signed-off-by: Len Brown <len.brown@intel.com>
Interval-mode turbostat now catches and discards SIGUSR1.
Thus, SIGUSR1 can be used to tell turbostat to cut short
the current measurement interval. Turbostat will then start
the next measurement interval using the regular interval length.
This can be used to give turbostat variable intervals.
Invoke turbostat with --interval LARGE_NUMBER_SEC
and have a program that has permission to send it a SIGUSR1
always before LARGE_NUMBER_SEC expires.
It may also be useful to use "--enable Time_Of_Day_Seconds"
to observe the actual interval length.
Signed-off-by: Len Brown <len.brown@intel.com>
Add a Time_Of_Day_Seconds column showing when measurement
for each row was completed. Units are [sec.subsec] since Epoch,
as reported by gettimeofday(2).
While useful to correlate turbostat output with other tools,
this built-in column is disabled, by default.
Add the "--enable" option to enable such disabled-by-default
built-in columns:
"--enable Time_Of_Day_Seconds"
"--enable usec"
"--enable all", will enable all disabled-by-defauilt built-in counters.
When "--debug" is used, all disabled-by-default columns are enabled,
unless explicitly skipped using "--hide"
Signed-off-by: Len Brown <len.brown@intel.com>
Turbostat neglects to display all package C-states for some Skylake Xeon BIOS configurations.
This is due to a typo in the table decoding MSR_PKG_CST_CONFIG_CONTROL (0x000000e2)
Here we fix that typo, according to Intel SDM, vol 4, Table 2-41 -
"MSRs Supported by Intel® Xeon® Processor Scalable Family with DisplayFamily_DisplayModel 06_55H".
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
general changes:
- make python dependent on version2 to enable clearlinux
- upgrade dmesg error/warning extraction to be more detailed
- enable logs generated from -cmd runs to be processed in gzip form
- add notification on power mode entry failure into the timeline
- add -battery option to show if battery is connected and its charge
summary changes (output of -summary):
- add -genhtml option to regenerate missing timelines from logs found
- add min/max/median/avg data to the summary page with links to the data
- add highlight to minimum, maximum, and median tests
- add result column to summary (pass or fail) with red highlight on fail
- add issues column to summary with a list of dmesg err/warn/bugs
Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Allow the user to override the default trace buffer memory allocation
by adding a command line option to override the default.
The patch also:
Adds a SIGINT (i.e. CTRL C exit) handler,
so that things can be cleaned up before exit.
Moves the postion of some other cleanup from after to
before the potential "No valid data to plot" exit.
Replaces all quit() calls with sys.exit, because
quit() is not supposed to be used in scripts.
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Trivial fix to spelling mistake in dprintf message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Commit 7ed1c1901f (tools: fix cross-compile var clobbering) removed
setting of LD to $(CROSS_COMPILE)gcc. This broke build of acpica
(acpidump) in power/acpi:
ld: unrecognized option '-D_LINUX'
The tools pass CFLAGS to the linker (incl. -D_LINUX), so revert this
particular change and let LD be $(CC) again. Note that the old behaviour
was a bit different, it used $(CROSS_COMPILE)gcc which was eliminated by
the commit 7ed1c1901f. We use $(CC) for that reason.
Fixes: 7ed1c1901f (tools: fix cross-compile var clobbering)
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Modify the cpuidle poll state implementation to prevent CPUs from
staying in the loop in there for excessive times (Rafael Wysocki).
- Add Intel Cannon Lake chips support to the RAPL power capping
driver (Joe Konno).
- Add reference counting to the device links handling code in the
PM core (Lukas Wunner).
- Avoid reconfiguring GPEs on suspend-to-idle in the ACPI system
suspend code (Rafael Wysocki).
- Allow devices to be put into deeper low-power states via ACPI
if both _SxD and _SxW are missing (Daniel Drake).
- Reorganize the core ACPI suspend-to-idle wakeup code to avoid a
keyboard wakeup issue on Asus UX331UA (Chris Chiu).
- Prevent the PCMCIA library code from aborting suspend-to-idle due
to noirq suspend failures resulting from incorrect assumptions
(Rafael Wysocki).
- Add coupled cpuidle supprt to the Exynos3250 platform (Marek
Szyprowski).
- Add new sysfs file to make it easier to specify the image storage
location during hibernation (Mario Limonciello).
- Add sysfs files for collecting suspend-to-idle usage and time
statistics for CPU idle states (Rafael Wysocki).
- Update the pm-graph utilities (Todd Brandt).
- Reduce the kernel log noise related to reporting Low-power Idle
constraings by the ACPI system suspend code (Rafael Wysocki).
- Make it easier to distinguish dedicated wakeup IRQs in the
/proc/interrupts output (Tony Lindgren).
- Add the frequency table validation in cpufreq to the core and
drop it from a number of cpufreq drivers (Viresh Kumar).
- Drop "cooling-{min|max}-level" for CPU nodes from a couple of
DT bindings (Viresh Kumar).
- Clean up the CPU online error code path in the cpufreq core
(Viresh Kumar).
- Fix assorted issues in the SCPI, CPPC, mediatek and tegra186
cpufreq drivers (Arnd Bergmann, Chunyu Hu, George Cherian,
Viresh Kumar).
- Drop memory allocation error messages from a few places in
cpufreq and cpuildle drivers (Markus Elfring).
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Merge tag 'pm-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These update the cpuidle poll state definition to reduce excessive
energy usage related to it, add new CPU ID to the RAPL power capping
driver, update the ACPI system suspend code to handle some special
cases better, extend the PM core's device links code slightly, add new
sysfs attribute for better suspend-to-idle diagnostics and easier
hibernation handling, update power management tools and clean up
cpufreq quite a bit.
Specifics:
- Modify the cpuidle poll state implementation to prevent CPUs from
staying in the loop in there for excessive times (Rafael Wysocki).
- Add Intel Cannon Lake chips support to the RAPL power capping
driver (Joe Konno).
- Add reference counting to the device links handling code in the PM
core (Lukas Wunner).
- Avoid reconfiguring GPEs on suspend-to-idle in the ACPI system
suspend code (Rafael Wysocki).
- Allow devices to be put into deeper low-power states via ACPI if
both _SxD and _SxW are missing (Daniel Drake).
- Reorganize the core ACPI suspend-to-idle wakeup code to avoid a
keyboard wakeup issue on Asus UX331UA (Chris Chiu).
- Prevent the PCMCIA library code from aborting suspend-to-idle due
to noirq suspend failures resulting from incorrect assumptions
(Rafael Wysocki).
- Add coupled cpuidle supprt to the Exynos3250 platform (Marek
Szyprowski).
- Add new sysfs file to make it easier to specify the image storage
location during hibernation (Mario Limonciello).
- Add sysfs files for collecting suspend-to-idle usage and time
statistics for CPU idle states (Rafael Wysocki).
- Update the pm-graph utilities (Todd Brandt).
- Reduce the kernel log noise related to reporting Low-power Idle
constraings by the ACPI system suspend code (Rafael Wysocki).
- Make it easier to distinguish dedicated wakeup IRQs in the
/proc/interrupts output (Tony Lindgren).
- Add the frequency table validation in cpufreq to the core and drop
it from a number of cpufreq drivers (Viresh Kumar).
- Drop "cooling-{min|max}-level" for CPU nodes from a couple of DT
bindings (Viresh Kumar).
- Clean up the CPU online error code path in the cpufreq core (Viresh
Kumar).
- Fix assorted issues in the SCPI, CPPC, mediatek and tegra186
cpufreq drivers (Arnd Bergmann, Chunyu Hu, George Cherian, Viresh
Kumar).
- Drop memory allocation error messages from a few places in cpufreq
and cpuildle drivers (Markus Elfring)"
* tag 'pm-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (56 commits)
ACPI / PM: Fix keyboard wakeup from suspend-to-idle on ASUS UX331UA
cpufreq: CPPC: Use transition_delay_us depending transition_latency
PM / hibernate: Change message when writing to /sys/power/resume
PM / hibernate: Make passing hibernate offsets more friendly
cpuidle: poll_state: Avoid invoking local_clock() too often
PM: cpuidle/suspend: Add s2idle usage and time state attributes
cpuidle: Enable coupled cpuidle support on Exynos3250 platform
cpuidle: poll_state: Add time limit to poll_idle()
cpufreq: tegra186: Don't validate the frequency table twice
cpufreq: speedstep: Don't validate the frequency table twice
cpufreq: sparc: Don't validate the frequency table twice
cpufreq: sh: Don't validate the frequency table twice
cpufreq: sfi: Don't validate the frequency table twice
cpufreq: scpi: Don't validate the frequency table twice
cpufreq: sc520: Don't validate the frequency table twice
cpufreq: s3c24xx: Don't validate the frequency table twice
cpufreq: qoirq: Don't validate the frequency table twice
cpufreq: pxa: Don't validate the frequency table twice
cpufreq: ppc_cbe: Don't validate the frequency table twice
cpufreq: powernow: Don't validate the frequency table twice
...
* pm-cpuidle:
cpuidle: poll_state: Avoid invoking local_clock() too often
PM: cpuidle/suspend: Add s2idle usage and time state attributes
cpuidle: Enable coupled cpuidle support on Exynos3250 platform
cpuidle: poll_state: Add time limit to poll_idle()
ARM: cpuidle: Drop memory allocation error message from arm_idle_init_cpu()
* pm-tools:
pm-graph: AnalyzeSuspend v5.0
pm-graph: AnalyzeBoot v2.2
pm-graph: config files and installer
* acpica: (21 commits)
ACPICA: Update version to 20180313
ACPICA: Cleanup/simplify module-level code support
ACPICA: Events: add a return on failure from acpi_hw_register_read
ACPICA: adding SPDX headers
ACPICA: Rename a global for clarity, no functional change
ACPICA: macros: fix ACPI_ERROR_NAMESPACE macro
ACPICA: Change a compile-time option to a runtime option
ACPICA: Remove calling of _STA from acpi_get_object_info()
ACPICA: AML Debug Object: Don't ignore output of zero-length strings
ACPICA: Fix memory leak on unusual memory leak
ACPICA: Events: Dispatch GPEs after enabling for the first time
ACPICA: Events: Add parallel GPE handling support to fix potential redundant _Exx evaluations
ACPICA: Events: Stop unconditionally clearing ACPI IRQs during suspend/resume
ACPICA: acpi: acpica: fix acpi operand cache leak in nseval.c
ACPICA: Update version to 20180209
ACPICA: Add option to disable Package object name resolution errors
ACPICA: Integrate package handling with module-level code
ACPICA: Revert "Fix for implicit result conversion for the To____ functions"
ACPICA: Update for some debug output. No functional change
ACPICA: Update error message, no functional change
...
Rafael J. Wysocki
Len Brown
Nathan Ciobanu
Mauro Carvalho Chehab
Prarit Bhargava
Chen Yu
Srinivas Pandruvada
Matt Turner
Laura Abbott
Artem Bityutskiy
Abhishek Goel
Todd E Brandt
Doug Smythies
Colin Ian King
Jiri Slaby
Linus Torvalds
Erik Schmauss