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freeing of inodes must be RCU-delayed on all filesystems
Cc: stable@vger.kernel.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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put_chars() stuffs the buffer it gets into an sg, but that buffer may be
on the stack. This breaks with CONFIG_VMAP_STACK=y (for me, it
manifested as printks getting turned into NUL bytes).
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
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When device IOTLB is enabled, all address translations were stored in
interval tree. O(lgN) searching time could be slow for virtqueue
metadata (avail, used and descriptors) since they were accessed much
often than other addresses. So this patch introduces an O(1) array
which points to the interval tree nodes that store the translations of
vq metadata. Those array were update during vq IOTLB prefetching and
were reset during each invalidation and tlb update. Each time we want
to access vq metadata, this small array were queried before interval
tree. This would be sufficient for static mappings but not dynamic
mappings, we could do optimizations on top.
Test were done with l2fwd in guest (2M hugepage):
noiommu | before | after
tx 1.32Mpps | 1.06Mpps(82%) | 1.30Mpps(98%)
rx 2.33Mpps | 1.46Mpps(63%) | 2.29Mpps(98%)
We can almost reach the same performance as noiommu mode.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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commit 1ea0ce40690dff38935538e8dab7b12683ded0d3 ("selinux: allow
changing labels for cgroupfs") broke the Android init program,
which looks up security contexts whenever creating directories
and attempts to assign them via setfscreatecon().
When creating subdirectories in cgroup mounts, this would previously
be ignored since cgroup did not support userspace setting of security
contexts. However, after the commit, SELinux would attempt to honor
the requested context on cgroup directories and fail due to permission
denial. Avoid breaking existing userspace/policy by wrapping this change
with a conditional on a new cgroup_seclabel policy capability. This
preserves existing behavior until/unless a new policy explicitly enables
this capability.
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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rcu_dereference_key() and user_key_payload() are currently being used in
two different, incompatible ways:
(1) As a wrapper to rcu_dereference() - when only the RCU read lock used
to protect the key.
(2) As a wrapper to rcu_dereference_protected() - when the key semaphor is
used to protect the key and the may be being modified.
Fix this by splitting both of the key wrappers to produce:
(1) RCU accessors for keys when caller has the key semaphore locked:
dereference_key_locked()
user_key_payload_locked()
(2) RCU accessors for keys when caller holds the RCU read lock:
dereference_key_rcu()
user_key_payload_rcu()
This should fix following warning in the NFS idmapper
===============================
[ INFO: suspicious RCU usage. ]
4.10.0 #1 Tainted: G W
-------------------------------
./include/keys/user-type.h:53 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 0
1 lock held by mount.nfs/5987:
#0: (rcu_read_lock){......}, at: [<d000000002527abc>] nfs_idmap_get_key+0x15c/0x420 [nfsv4]
stack backtrace:
CPU: 1 PID: 5987 Comm: mount.nfs Tainted: G W 4.10.0 #1
Call Trace:
dump_stack+0xe8/0x154 (unreliable)
lockdep_rcu_suspicious+0x140/0x190
nfs_idmap_get_key+0x380/0x420 [nfsv4]
nfs_map_name_to_uid+0x2a0/0x3b0 [nfsv4]
decode_getfattr_attrs+0xfac/0x16b0 [nfsv4]
decode_getfattr_generic.constprop.106+0xbc/0x150 [nfsv4]
nfs4_xdr_dec_lookup_root+0xac/0xb0 [nfsv4]
rpcauth_unwrap_resp+0xe8/0x140 [sunrpc]
call_decode+0x29c/0x910 [sunrpc]
__rpc_execute+0x140/0x8f0 [sunrpc]
rpc_run_task+0x170/0x200 [sunrpc]
nfs4_call_sync_sequence+0x68/0xa0 [nfsv4]
_nfs4_lookup_root.isra.44+0xd0/0xf0 [nfsv4]
nfs4_lookup_root+0xe0/0x350 [nfsv4]
nfs4_lookup_root_sec+0x70/0xa0 [nfsv4]
nfs4_find_root_sec+0xc4/0x100 [nfsv4]
nfs4_proc_get_rootfh+0x5c/0xf0 [nfsv4]
nfs4_get_rootfh+0x6c/0x190 [nfsv4]
nfs4_server_common_setup+0xc4/0x260 [nfsv4]
nfs4_create_server+0x278/0x3c0 [nfsv4]
nfs4_remote_mount+0x50/0xb0 [nfsv4]
mount_fs+0x74/0x210
vfs_kern_mount+0x78/0x220
nfs_do_root_mount+0xb0/0x140 [nfsv4]
nfs4_try_mount+0x60/0x100 [nfsv4]
nfs_fs_mount+0x5ec/0xda0 [nfs]
mount_fs+0x74/0x210
vfs_kern_mount+0x78/0x220
do_mount+0x254/0xf70
SyS_mount+0x94/0x100
system_call+0x38/0xe0
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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The triplet present in "opp-microvolt" property should be in the order
<target min max>, while all the examples have it in the order
<min target max>.
Fix it.
Luckily all of the users of "opp-microvolt" property have applied brain
instead of copying the examples from documentation and none of the
actual dts files have it wrong.
Reported-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The '__unreachable' and '__func_stack_frame_non_standard' sections are
only used at compile time. They're discarded for vmlinux but they
should also be discarded for modules.
Since this is a recurring pattern, prefix the section names with
".discard.". It's a nice convention and vmlinux.lds.h already discards
such sections.
Also remove the 'a' (allocatable) flag from the __unreachable section
since it doesn't make sense for a discarded section.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jessica Yu <jeyu@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d1091c7fa3d5 ("objtool: Improve detection of BUG() and other dead ends")
Link: http://lkml.kernel.org/r/20170301180444.lhd53c5tibc4ns77@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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INPUT_PROP_BUTTONPAD is currently only set through the platform data.
The RMI4 header doc says that this property is there to force the
buttonpad property, so we also need to detect it by looking at
the exported buttons count.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reported-and-tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The retu watchdog calls into the respective mfd driver, but fails to
link if that is diabled:
drivers/watchdog/built-in.o: In function `retu_wdt_set_timeout':
ziirave_wdt.c:(.text+0x8c88): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8c88): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
drivers/watchdog/built-in.o: In function `retu_wdt_start':
ziirave_wdt.c:(.text+0x8cc8): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8cc8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
This restores the dependency as it was before
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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When the db8500 watchdog is enabled without the PRCMU, we get a lot of
warnings about duplicate or missing helper functions:
In file included from drivers/watchdog/ux500_wdt.c:21:0:
include/linux/mfd/dbx500-prcmu.h:422:19: error: redefinition of 'prcmu_abb_read'
static inline int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
This restores the dependency as it was.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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gcc-4.3 can't decide whether the constant value in
kempld_prescaler[PRESCALER_21] is built-time constant or
not, and gets confused by the logic in do_div():
drivers/watchdog/kempld_wdt.o: In function `kempld_wdt_set_stage_timeout':
kempld_wdt.c:(.text.kempld_wdt_set_stage_timeout+0x130): undefined reference to `__aeabi_uldivmod'
This adds a call to ACCESS_ONCE() to force it to not consider
it to be constant, and leaves the more efficient normal case
in place for modern compilers, using an #ifdef to annotate
why we do this hack.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Checking for timer expiration is done from the softirq TIMER_SOFTIRQ.
Since commit 4cd13c21b207 ("softirq: Let ksoftirqd do its job"),
pending softirqs are no longer always handled immediately, instead,
if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING,
the handling of the softirqs are deferred, and are instead supposed
to be handled by ksoftirqd, when ksoftirqd gets scheduled.
If a user space process with a real-time policy starts to misbehave
by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING,
what will happen is that all softirqs will get deferred, while ksoftirqd,
which is supposed to handle the deferred softirqs, will never get to run.
To make sure that the watchdog is able to fire even when we do not get
to run softirqs, replace the timers with hrtimers.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The kempld watchdog driver requires the respective MFD driver:
drivers/watchdog/built-in.o: In function `kempld_wdt_probe':
kempld_wdt.c:(.text+0x5c78): undefined reference to `kempld_get_mutex'
kempld_wdt.c:(.text+0x5c84): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5c8e): undefined reference to `kempld_release_mutex'
kempld_wdt.c:(.text+0x5d1c): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5d2c): undefined reference to `kempld_write8'
This adds the Kconfig dependency back.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Without CONFIG_OF, the driver fails to link:
drivers/watchdog/built-in.o: In function `bcm2835_power_off':
bcm2835_wdt.c:(.text+0x1946): undefined reference to `of_find_device_by_node'
This adds a new dependency, to allow the COMPILE_TEST check to succeed.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The driver fails to link if ARM_AMBA is disabled:
drivers/watchdog/sp805_wdt.o: In function `sp805_wdt_driver_init':
sp805_wdt.c:(.init.text+0x4): undefined reference to `amba_driver_register'
It seems that the COMPILE_TEST was added in the wrong place, as there
is no architecture dependency, but a bus dependency. This moves
the dependency accordingly.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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This driver fails to link when CONFIG_I2C is disabled or a loadable module while
the watchdog is built-in:
drivers/watchdog/built-in.o: In function `menf21bmc_wdt_shutdown':
menf21bmc_wdt.c:(.text+0x9b44): undefined reference to `i2c_smbus_write_word_data'
menf21bmc_wdt.c:(.text+0x9b44): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `i2c_smbus_write_word_data'
This adds a Kconfig dependency for it, to enforce a valid configuration.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Wtihout CONFIG_CS5535_MFGPT, the driver does not link right:
drivers/watchdog/built-in.o: In function `geodewdt_probe':
geodewdt.c:(.init.text+0xca3): undefined reference to `cs5535_mfgpt_alloc_timer'
geodewdt.c:(.init.text+0xcd4): undefined reference to `cs5535_mfgpt_write'
geodewdt.c:(.init.text+0xcef): undefined reference to `cs5535_mfgpt_toggle_event'
This adds back the dependency on this base driver.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The wm831x watchdog driver can now be built without the wm831x mfd
driver, which results in a link error:
(.text+0x1a95c): undefined reference to `wm831x_set_bits'
(.text+0x1a95c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_set_bits'
(.text+0x1a968): undefined reference to `wm831x_reg_lock'
(.text+0x1a968): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_lock'
(.text+0x1a9dc): undefined reference to `wm831x_reg_unlock'
(.text+0x1a9dc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_unlock'
This adds back the dependency that was removed. We can still build test
this driver on all architectures by enabling the MFD driver for it first.
Fixes: da2a68b3eb47 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Linus reported the following commit broke module loading on his laptop:
d1091c7fa3d5 ("objtool: Improve detection of BUG() and other dead ends")
It showed errors like the following:
module: overflow in relocation type 10 val ffffffffc02afc81
module: 'nvme' likely not compiled with -mcmodel=kernel
The problem is that the __unreachable section addresses are stored using
the '.long' asm directive, which isn't big enough for .text section
kernel addresses. Use relative addresses instead:
".long %c0b - .\t\n"
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d1091c7fa3d5 ("objtool: Improve detection of BUG() and other dead ends")
Link: http://lkml.kernel.org/r/20170301060504.oltm3iws6fmubnom@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The turbostat before this last set of changes is obsolete.
This new version can do a lot more, but it also has
some different defaults, that might catch some off-guard.
So it seems a good time to give a new version number.
Signed-off-by: Len Brown <len.brown@intel.com>
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When the "u32" keyword is used with --add, it means that
the output should be truncated to 32-bits. This was not
happening and all 64-bits were printed.
Also, when no column name was used for an added MSR,
The default column name was in deximal, eg. MSR16.
Users report that they tend to use hex MSR numbers,
so print them in hex. To always fit into the columns,
use the syntax M0x10. Note that the user can always
supply any column header that they want.
eg --add msr0x10,MY_TSC
Signed-off-by: Len Brown <len.brown@intel.com>
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When turbostat is run in one-shot command mode,
the parent takes the 'before' counter snapshot,
fork/exec/wait for the child to exit,
takes the 'after' counter snapshot,
and prints the results.
however, if the child fails to exec the command,
it immediately returns, without indicating that
anythign was wrong.
Add an error message showing that exec failed:
sudo turbostat sleeeep 4
...
turbostat: exec sleeeep: No such file or directory
...
Note that the parent will still print out the statistics,
because it can't tell the difference between the failed
exec and a command that is purposefully returning
the same status. Unfortunately, this may obscure the
error message. However, if the --out parameter is used,
the error message is evident on stderr.
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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cpu1: cpufreq driver: acpi-cpufreq
cpu1: cpufreq governor: ondemand
cpufreq boost: 1
or
cpu0: cpufreq driver: intel_pstate
cpu0: cpufreq governor: powersave
cpufreq intel_pstate no_turbo: 0
Signed-off-by: Len Brown <len.brown@intel.com>
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On multi-package systems, the "Package" column was being displayed
only if --debug was used. Show it always.
Signed-off-by: Len Brown <len.brown@intel.com>
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Originally, the only way to hide the sysfs C-state statistics columns
was with "--hide sysfs". This was because we process "--hide" before
we probe for those columns.
hack --hide to remember deferred hide requests, and apply
them when sysfs is probed.
"--hide sysfs" is still available as short-hand to refer to
the entire group of counters.
The down-side of this change is that we no longer error check for
bogus --hide column names. But the user will quickly figure that
out if a column they mean to hide is still there...
Signed-off-by: Len Brown <len.brown@intel.com>
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--Package is now "--cpu package",
which will display just the 1st CPU in each package
--processor is not "--cpu core"
which will display just the 1st CPU in each core
Signed-off-by: Len Brown <len.brown@intel.com>
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update examples to show recently updated features.
In particular
--add
--show
--hide
--cpu
--list
Signed-off-by: Len Brown <len.brown@intel.com>
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Make it possible to take the entire un-edited output
from `turbostat --list` and feed it to "turbostat --show"
or "turbostat --hide".
To do this, the leading comma was removed
(no mater what columns are active)
and also they dynamic C-state "C1, C2, C3" etc are replaced
by the string "sysfs", which refers to them as a group.
Signed-off-by: Len Brown <len.brown@intel.com>
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When a counter overlfows 7 columns, it shifts the remaining
columns to the right, so they no longer line up under
their column header.
Update turbostat to dectect when it is handling large
numbers, and switch to wider columns where, necessary.
Reported-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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It is handy to know the list of column header names,
so that they can be used with --add and --skip
The new --list option shows them:
sudo ./turbostat --list --hide sysfs
,Core,CPU,Avg_MHz,Busy%,Bzy_MHz,TSC_MHz,IRQ,SMI,CPU%c1,CPU%c3,CPU%c6,CPU%c7,CoreTmp,PkgTmp,GFX%rc6,GFXMHz,PkgWatt,CorWatt,GFXWatt
Signed-off-by: Len Brown <len.brown@intel.com>
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The IRQ column has been working for periodic mode,
but not in one-shot command mode, it shows only 0.
until now.
Signed-off-by: Len Brown <len.brown@intel.com>
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With the --cpu parameter, turbostat prints only lines
for the specified set of CPUs:
sudo ./turbostat --quiet --show Core,CPU --cpu 0,1,3..5,6-7
Core CPU
- -
0 0
0 4
1 1
1 5
2 6
3 3
3 7
Signed-off-by: Len Brown <len.brown@intel.com>
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When turbostat shows % of time in a CPU idle power state,
it has always been showing information from underlying
hardware residency counters.
While this reflects what the hardware is doing, and is thus
useful for understanding the hardware,
it doesn't directly tell us what Linux requested --
which is useful for tuning Linux itself.
Here we add columns to turbostat to show the
Linux cpuidle sub-system statistics:
/sys/devices/system/cpu/cpu*/cpuidle/state*/*
The first group of columns are the "usage", which is the
number of times software requested that C-state in the
measurement interval. eg C1 below.
The second group of columns are the "time", which is the percentage
of the measurement interval time that software has requested
the specified C-state. eg C1% below.
These software counters can be compared to the underlying
hardware residency counters (eg CPU%c1 CPU%c3 CPU%c6 CPU%c7)
to compare what sofware requested to what the hardware delivered.
These sysfs attributes are discovered when turbostat starts,
rather than being "built in". So the --show and --hide
parameters do not know about these dynamic column names.
However "--show sysfs" and "--hide sysfs" act on the
entire group of columns:
turbostat --show sysfs
...
cpu4: POLL: CPUIDLE CORE POLL IDLE
cpu4: C1: MWAIT 0x00
cpu4: C1E: MWAIT 0x01
cpu4: C3: MWAIT 0x10
cpu4: C6: MWAIT 0x20
cpu4: C7s: MWAIT 0x32
...
C1 C1E C3 C6 C7s C1% C1E% C3% C6% C7s%
3 6 5 1 188 0.00 0.02 0.00 0.00 99.93
0 6 5 0 58 0.00 0.16 0.02 0.00 99.70
0 0 0 0 9 0.00 0.00 0.00 0.00 99.96
0 0 0 1 24 0.00 0.00 0.00 0.02 99.93
0 0 0 0 9 0.00 0.00 0.00 0.00 99.97
0 0 0 0 32 0.00 0.00 0.00 0.00 99.96
0 0 0 0 7 0.00 0.00 0.00 0.00 99.98
2 0 0 0 36 0.00 0.00 0.00 0.00 99.97
1 0 0 0 13 0.00 0.00 0.00 0.00 99.98
Signed-off-by: Len Brown <len.brown@intel.com>
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Previously, the --add option could specify only an MSR.
Here is is extended so an arbitrary /sys attribute,
as specified by an absolute file path name.
sudo ./turbostat --add /sys/devices/system/cpu/cpu0/cpuidle/state5/usage
Signed-off-by: Len Brown <len.brown@intel.com>
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Skip these two counters on BDX, as they are always zero:
cc7, pc7
Signed-off-by: Len Brown <len.brown@intel.com>
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Newer processors do not hard-code the the number of cpus in each bin
to {1, 2, 3, 4, 5, 6, 7, 8} Rather, they can specify any number
of CPUS in each of the 8 bins:
eg.
...
37 * 100.0 = 3600.0 MHz max turbo 4 active cores
38 * 100.0 = 3700.0 MHz max turbo 3 active cores
39 * 100.0 = 3800.0 MHz max turbo 2 active cores
39 * 100.0 = 3900.0 MHz max turbo 1 active cores
could now look something like this:
...
37 * 100.0 = 3600.0 MHz max turbo 16 active cores
38 * 100.0 = 3700.0 MHz max turbo 8 active cores
39 * 100.0 = 3800.0 MHz max turbo 4 active cores
39 * 100.0 = 3900.0 MHz max turbo 2 active cores
Signed-off-by: Len Brown <len.brown@intel.com>
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Skip these four counters on SKX, as they are always zero:
cc3, pc3
cc7, pc7
Signed-off-by: Len Brown <len.brown@intel.com>
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The CC1 column in tubostat can be computed by subtracting
the core c-state residency countes from the total Cx residency.
CC1 = (Idle_time_as_measured by MPERF) - (all core C-states with
residency counters)
However, as the underlying counter reads are not atomic,
error can be noticed in this calculations, especially
when the numbers are small.
Denverton has a hardware CC1 residency counter
to improve the accuracy of the cc1 statistic -- use it.
At the same time, Denverton has no concept of CC3, PC3, CC7, PC7,
so skip collecting and printing those columns.
Finally, a note of clarification.
Turbostat prints the standard PC2 residency counter,
but on Denverton hardware, that actually means PC1E.
Turbostat prints the standard PC6 residency counter,
but on Denverton hardware, that actually means PC2.
At this point, we document that differnce in this commit message,
rather than adding a quirk to the software.
Signed-off-by: Len Brown <len.brown@intel.com>
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Gemini Lake is similar to Apollo Lake (Broxton/Goldmont)
Signed-off-by: Len Brown <len.brown@intel.com>
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Cc: x86@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
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Fix a bug with --add, where the title of the column
is un-initialized if not specified by the user.
The initial implementation of --show and --hide
neglected to handle the pc8/pc9/pc10 counters.
Fix a bug where "--show Core" only worked with --debug
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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The CPU ticks at a rate in the "bus clock" domain.
eg. 100 MHz * bus_ratio.
On newer processors, the TSC has been moved out of this BCLK
domain and into a separate crystal-clock domain.
While the TSC ticks "close to" the base frequency, those that look
closely at the numbers will notice small errors in calculations that
mix units of TSC clocks and bus clocks.
"tsc_tweak" was introduced to address the most visible
mixing -- the %Busy and the the Busy_MHz calculations.
(A simplification as since removed TSC from the BusyMHz calculation)
Here we apply the tsc_tweak to everyplace where BCLK
and TSC units are mixed. The results is that
on a system which is 100% idle, the sum of the C-states
are now much more likely to be closer to 100%.
Reported-by: Travis Downs <travis.downs@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Some users want turbostat to tell them everything, by default.
Some users want turbostat to be quiet, by default.
I find that I'm in the 1st camp, and so I've never liked
needing to type the --debug parameter to decode the system
configuration.
So here we change the default and print the system configuration,
by default. (The --debug option is now un-documented, though
it does still exist for debugging turbostat internals)
When you do not want to see the system configuration
header, use the new "--quiet" option.
Signed-off-by: Len Brown <len.brown@intel.com>
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Some time ago, turbostat overflowed 80 columns.
So on the assumption that a "casual" user would always
want topology and frequency columns, we hid the rest
of the columns and the system configuration decoding
behind the --debug option.
Not everybody liked that change -- including me.
I use --debug 99% of the time...
Well, now we have "-o file" to put turbostat output into a file,
so unless you are watching real-time in a small window,
column count is less frequently a factor.
And more recently, we got the "--hide columnA,columnB" option
to specify columns to skip.
So now we "un-hide" the rest of the columns from behind --debug,
and show them all, by default.
Signed-off-by: Len Brown <len.brown@intel.com>
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useful for observing if the BIOS disabled prefetch
Not architectural, but docuemented as present on NHM, SNB
and is present on others.
Signed-off-by: Len Brown <len.brown@intel.com>
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This non-architectural MSR has disable bits
for various prefetchers on modern processors.
While these bits are generally touched only by the BIOS,
say, via BIOS SETUP, it is useful to dump them
when examining options that can alter performance.
Cc: x86@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
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show the CPUID feature for turbo to clarify the case
when it may not be shown in MISC_ENABLE
CPUID(6): APERF, TURBO, DTS, PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, EPB
cpu4: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT TURBO)
Signed-off-by: Len Brown <len.brown@intel.com>
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Turbostat dumps MSR_TURBO_RATIO_LIMIT on Core Architecture.
But Atom Architecture uses MSR_ATOM_CORE_RATIOS and
MSR_ATOM_CORE_TURBO_RATIOS.
Signed-off-by: Len Brown <len.brown@intel.com>
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Originally, these MSRs were locally defined in this driver.
Now the definitions are in msr-index.h -- use them.
Signed-off-by: Len Brown <len.brown@intel.com>
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These MSRs are currently used by the intel_pstate driver,
using a local definition.
Cc: x86@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
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Peter Zijlstra
Omar Sandoval
Jason Wang
Stephen Smalley
David Howells
Viresh Kumar
Josh Poimboeuf
Benjamin Tissoires
Arnd Bergmann
Niklas Cassel
Len Brown