- 18 Oct, 2007 40 commits
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Satyam Sharma authored
The return of the present "do {} while" based stub definition of register_hotcpu_notifier() cannot be checked. This makes the stub asymmetric w.r.t. the real HOTPLUG_CPU=y implementation that is int-returning. So let us redefine this to be consistent with the full version. Also do the same for unregister_hotcpu_notifier(). We cannot define these as static inline functions due to an existing GCC bug (#33172). So define as macros that return appropriately instead (int '0' for the register_hotcpu_notifier case and void for unregister_hotcpu_notifier). Signed-off-by:Satyam Sharma <satyam@infradead.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michael Neuling authored
This adds POWERPC specific hooks for scaled time accounting. POWER6 includes a SPURR register. The SPURR is based off the PURR register but is scaled based on CPU frequency and issue rates. This gives a more accurate account of the instructions used per task. The PURR and timebase will be constant relative to the wall clock, irrespective of the CPU frequency. This implementation reads the SPURR register in account_system_vtime which is only call called on context witch and hard and soft irq entry and exit. The percentage of user and system time is then estimated using the ratio of these accounted by the PURR. If the SPURR is not present, the PURR read. An earlier implementation of this patch read the SPURR whenever the PURR was read, which included the system call entry and exit path. Unfortunately this showed a performance regression on lmbench runs, so was re-implemented. I've included the lmbench results here when run bare metal on POWER6. 1st column is the unpatch results. 2nd column is the results using the below patch and the 3rd is the % diff of these results from the base. 4th and 5th columns are the results and % differnce from the base using the older patch (SPURR read in syscall entry/exit path). Base Scaled-Acct SPURR-in-syscall Result Result % diff Result % diff Simple syscall: 0.3086 0.3086 0.0000 0.3452 11.8600 Simple read: 0.4591 0.4671 1.7425 0.5044 9.86713 Simple write: 0.4364 0.4366 0.0458 0.4731 8.40971 Simple stat: 2.0055 2.0295 1.1967 2.0669 3.06158 Simple fstat: 0.5962 0.5876 -1.442 0.6368 6.80979 Simple open/close: 3.1283 3.1009 -0.875 3.2088 2.57328 Select on 10 fd's: 0.8554 0.8457 -1.133 0.8667 1.32101 Select on 100 fd's: 3.5292 3.6329 2.9383 3.6664 3.88756 Select on 250 fd's: 7.9097 8.1881 3.5197 8.2242 3.97613 Select on 500 fd's: 15.2659 15.836 3.7357 15.873 3.97814 Select on 10 tcp fd's: 0.9576 0.9416 -1.670 0.9752 1.83792 Select on 100 tcp fd's: 7.248 7.2254 -0.311 7.2685 0.28283 Select on 250 tcp fd's: 17.7742 17.707 -0.375 17.749 -0.1406 Select on 500 tcp fd's: 35.4258 35.25 -0.496 35.286 -0.3929 Signal handler installation: 0.6131 0.6075 -0.913 0.647 5.52927 Signal handler overhead: 2.0919 2.1078 0.7600 2.1831 4.35967 Protection fault: 0.7345 0.7478 1.8107 0.8031 9.33968 Pipe latency: 33.006 16.398 -50.31 33.475 1.42368 AF_UNIX sock stream latency: 14.5093 30.910 113.03 30.715 111.692 Process fork+exit: 219.8 222.8 1.3648 229.37 4.35623 Process fork+execve: 876.14 873.28 -0.32 868.66 -0.8533 Process fork+/bin/sh -c: 2830 2876.5 1.6431 2958 4.52296 File /var/tmp/XXX write bw: 1193497 1195536 0.1708 118657 -0.5799 Pagefaults on /var/tmp/XXX: 3.1272 3.2117 2.7020 3.2521 3.99398 Also, kernel compile times show no difference with this patch applied. [pbadari@us.ibm.com: Avoid unnecessary PURR reading] Signed-off-by:Michael Neuling <mikey@neuling.org> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by:
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Michael Neuling authored
This moves the new items to the end of the taskstats struct as requested by Balbir and yourself. Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Michael Neuling authored
This adds items to the taststats struct to account for user and system time based on scaling the CPU frequency and instruction issue rates. Adds account_(user|system)_time_scaled callbacks which architectures can use to account for time using this mechanism. Signed-off-by:
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Joe Perches authored
Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by:
Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Jiri Slaby authored
Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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Jiri Slaby authored
if (controller && !request_region) then we leaked a tty driver struct, fix it by adding function deinit tail with goto-ing into it (and from other fail paths too) Signed-off-by:
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Jiri Slaby authored
We may use pdev->revision instead of reading pci config space directly, so remove pci_read_config_dword invoking. Signed-off-by:
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Jiri Slaby authored
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Jiri Slaby authored
- register_device unconditionally (non-pci dependent) to have also isa devices in /dev - unregister devices on module removal - don't set TTY_DRIVER_DYNAMIC_DEV twice (removed the one dependent on some macro) Signed-off-by:
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Jiri Slaby authored
rocket, switch sleep_on to completion - sleep_on is deprecated and racy, use completion instead - also check retval of interruptible function and return ERESTARTSYS eventually Signed-off-by:
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Jiri Slaby authored
interruptible_sleep_on is deprecated, use completion instead Signed-off-by:
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Jiri Slaby authored
prepend moxa_ to all moxa functions which laxes this Signed-off-by:
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Jiri Slaby authored
- use dev_* where pdev is available (probe function) - add some printks on fail paths - add KERN_ macros otherwise - remove useless verbose variable - wrap lines to 80 cols at most Signed-off-by:
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Jesper Juhl authored
CC drivers/char/cyclades.o drivers/char/cyclades.c: In function 'cy_init': drivers/char/cyclades.c:5488: warning: label 'err_unr' defined but not used Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Acked-by:
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Jiri Slaby authored
Most of them are signedness, the rest unused function parameters. Signed-off-by:
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Jiri Slaby authored
Lock whole processing in isr, avoid error-prone locking/unlocking in rx/tx esp. On fail paths (there was a bug in the past yet). Signed-off-by:
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Jiri Slaby authored
Due to large indent the code was wrapped and unreadable. Create 3 function instead of one and reorder the code, so it is readable now. Signed-off-by:
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Jiri Slaby authored
The work done in bottom half doesn't cost much cpu time (e.g. tty_hangup itself schedules its own bottom half), it's possible to do the work in isr directly and save hence some .text. Signed-off-by:
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Jiri Slaby authored
moxa, fix and optimise empty timer don't wait and delete empty timer in empty timer function. Also fire next empty timer at rounded jiffies to save power. Signed-off-by:
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Adrian Bunk authored
This patch contains the next round of scheduled OSS code removal. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Daniel Walker authored
Signed-off-by:
Daniel Walker <dwalker@mvista.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
Just removing white space at the end of lines. Signed-off-by:
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
Large chunks of 5 spaces instead of tabs. Signed-off-by:
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
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Daniel Walker authored
Lots of converting spaces to tabs. Signed-off-by:
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Daniel Walker authored
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Jesper Juhl authored
drivers/char/mxser.c:386: warning: 'mxser_get_PCI_conf' declared 'static' but never defined when building without CONFIG_PCI. [jesper.juhl@gmail.com: Fix warning: 'CheckIsMoxaMust' defined but not used] Signed-off-by:
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Alan Cox authored
This is years dead code and it keeps turning up in confusing ways when grepping for stuff. Signed-off-by:
Alan Cox <alan@redhat.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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Jiri Slaby authored
mxser_new, remove useless comments in mxser_cards It was rest from times, where info about the card was separated (name, ports number and flags). Signed-off-by:
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