e4fc250c15
Non-SMP, i386-only, no polling in the idle loop at the moment.
To use this code you must compile a kernel with
options DEVICE_POLLING
and at runtime enable polling with
sysctl kern.polling.enable=1
The percentage of CPU reserved to userland can be set with
sysctl kern.polling.user_frac=NN (default is 50)
while the remainder is used by polling device drivers and netisr's.
These are the only two variables that you should need to touch. There
are a few more parameters in kern.polling but the default values
are adequate for all purposes. See the code in kern_poll.c for
more details on them.
Polling in the idle loop will be implemented shortly by introducing
a kernel thread which does the job. Until then, the amount of CPU
dedicated to polling will never exceed (100-user_frac).
The equivalent (actually, better) code for -stable is at
http://info.iet.unipi.it/~luigi/polling/
and also supports polling in the idle loop.
NOTE to Alpha developers:
There is really nothing in this code that is i386-specific.
If you move the 2 lines supporting the new option from
sys/conf/{files,options}.i386 to sys/conf/{files,options} I am
pretty sure that this should work on the Alpha as well, just that
I do not have a suitable test box to try it. If someone feels like
trying it, I would appreciate it.
NOTE to other developers:
sure some things could be done better, and as always I am open to
constructive criticism, which a few of you have already given and
I greatly appreciated.
However, before proposing radical architectural changes, please
take some time to possibly try out this code, or at the very least
read the comments in kern_poll.c, especially re. the reason why I
am using a soft netisr and cannot (I believe) replace it with a
simple timeout.
Quick description of files touched by this commit:
sys/conf/files.i386
new file kern/kern_poll.c
sys/conf/options.i386
new option
sys/i386/i386/trap.c
poll in trap (disabled by default)
sys/kern/kern_clock.c
initialization and hardclock hooks.
sys/kern/kern_intr.c
minor swi_net changes
sys/kern/kern_poll.c
the bulk of the code.
sys/net/if.h
new flag
sys/net/if_var.h
declaration for functions used in device drivers.
sys/net/netisr.h
NETISR_POLL
sys/dev/fxp/if_fxp.c
sys/dev/fxp/if_fxpvar.h
sys/pci/if_dc.c
sys/pci/if_dcreg.h
sys/pci/if_sis.c
sys/pci/if_sisreg.h
device driver modifications
220 lines
5.3 KiB
Plaintext
220 lines
5.3 KiB
Plaintext
# $FreeBSD$
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# Options specific to the i386 platform kernels
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DISABLE_PSE
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MATH_EMULATE opt_math_emulate.h
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GPL_MATH_EMULATE opt_math_emulate.h
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PMAP_SHPGPERPROC opt_pmap.h
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PPC_PROBE_CHIPSET opt_ppc.h
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PPC_DEBUG opt_ppc.h
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SHOW_BUSYBUFS
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PANIC_REBOOT_WAIT_TIME opt_panic.h
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MAXMEM
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PERFMON opt_perfmon.h
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POWERFAIL_NMI opt_trap.h
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AUTO_EOI_1 opt_auto_eoi.h
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AUTO_EOI_2 opt_auto_eoi.h
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CONSPEED opt_comconsole.h
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I586_PMC_GUPROF opt_i586_guprof.h
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WLCACHE opt_wavelan.h
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WLDEBUG opt_wavelan.h
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COMPAT_OLDISA
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BROKEN_KEYBOARD_RESET opt_reset.h
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KSTACK_PAGES
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# Options for emulators. These should only be used at config time, so
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# they are handled like options for static file systems
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# (see src/sys/conf/options), except for broken debugging options.
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IBCS2 opt_dontuse.h
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COMPAT_LINUX opt_dontuse.h
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DEBUG_LINUX opt_linux.h
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COMPAT_SVR4 opt_dontuse.h
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DEBUG_SVR4 opt_svr4.h
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PECOFF_SUPPORT opt_dontuse.h
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PECOFF_DEBUG opt_pecoff.h
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# i386 SMP options
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APIC_IO opt_global.h
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# Change KVM size. Changes things all over the kernel.
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KVA_PAGES opt_global.h
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CLK_CALIBRATION_LOOP opt_clock.h
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CLK_USE_I8254_CALIBRATION opt_clock.h
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CLK_USE_TSC_CALIBRATION opt_clock.h
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TIMER_FREQ opt_clock.h
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NO_F00F_HACK opt_cpu.h
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CPU_BLUELIGHTNING_FPU_OP_CACHE opt_cpu.h
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CPU_BLUELIGHTNING_3X opt_cpu.h
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CPU_BTB_EN opt_cpu.h
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CPU_CYRIX_NO_LOCK opt_cpu.h
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CPU_DIRECT_MAPPED_CACHE opt_cpu.h
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CPU_DISABLE_5X86_LSSER opt_cpu.h
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CPU_FASTER_5X86_FPU opt_cpu.h
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CPU_I486_ON_386 opt_cpu.h
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CPU_IORT opt_cpu.h
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CPU_L2_LATENCY opt_cpu.h
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CPU_LOOP_EN opt_cpu.h
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CPU_PPRO2CELERON opt_cpu.h
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CPU_RSTK_EN opt_cpu.h
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CPU_SUSP_HLT opt_cpu.h
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CPU_UPGRADE_HW_CACHE opt_cpu.h
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CPU_WT_ALLOC opt_cpu.h
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CYRIX_CACHE_WORKS opt_cpu.h
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CYRIX_CACHE_REALLY_WORKS opt_cpu.h
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NO_MEMORY_HOLE opt_cpu.h
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CPU_ENABLE_SSE opt_cpu.h
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# The CPU type affects the endian conversion functions all over the kernel.
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I386_CPU opt_global.h
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I486_CPU opt_global.h
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I586_CPU opt_global.h
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I686_CPU opt_global.h
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MAXCONS opt_syscons.h
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SC_ALT_MOUSE_IMAGE opt_syscons.h
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SC_CUT_SPACES2TABS opt_syscons.h
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SC_CUT_SEPCHARS opt_syscons.h
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SC_DEBUG_LEVEL opt_syscons.h
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SC_DFLT_FONT opt_syscons.h
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SC_DISABLE_DDBKEY opt_syscons.h
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SC_DISABLE_REBOOT opt_syscons.h
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SC_HISTORY_SIZE opt_syscons.h
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SC_KERNEL_CONS_ATTR opt_syscons.h
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SC_KERNEL_CONS_REV_ATTR opt_syscons.h
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SC_MOUSE_CHAR opt_syscons.h
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SC_NO_CUTPASTE opt_syscons.h
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SC_NO_FONT_LOADING opt_syscons.h
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SC_NO_HISTORY opt_syscons.h
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SC_NO_SYSMOUSE opt_syscons.h
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SC_NORM_ATTR opt_syscons.h
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SC_NORM_REV_ATTR opt_syscons.h
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SC_PIXEL_MODE opt_syscons.h
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SC_RENDER_DEBUG opt_syscons.h
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SC_TWOBUTTON_MOUSE opt_syscons.h
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VGA_ALT_SEQACCESS opt_vga.h
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VGA_DEBUG opt_vga.h
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VGA_NO_FONT_LOADING opt_vga.h
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VGA_NO_MODE_CHANGE opt_vga.h
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VGA_SLOW_IOACCESS opt_vga.h
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VGA_WIDTH90 opt_vga.h
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VESA opt_vesa.h
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VESA_DEBUG opt_vesa.h
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PSM_HOOKRESUME opt_psm.h
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PSM_RESETAFTERSUSPEND opt_psm.h
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PSM_DEBUG opt_psm.h
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PCI_ENABLE_IO_MODES opt_pci.h
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PCIC_RESUME_RESET opt_pcic.h
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ATKBD_DFLT_KEYMAP opt_atkbd.h
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KBD_DISABLE_KEYMAP_LOAD opt_kbd.h
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KBD_INSTALL_CDEV opt_kbd.h
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KBD_MAXRETRY opt_kbd.h
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KBD_MAXWAIT opt_kbd.h
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KBD_RESETDELAY opt_kbd.h
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KBDIO_DEBUG opt_kbd.h
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EISA_SLOTS opt_eisa.h
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# pcvt(4) has a bunch of options
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FAT_CURSOR opt_pcvt.h
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XSERVER opt_pcvt.h
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PCVT_24LINESDEF opt_pcvt.h
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PCVT_CTRL_ALT_DEL opt_pcvt.h
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PCVT_META_ESC opt_pcvt.h
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PCVT_NSCREENS opt_pcvt.h
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PCVT_PRETTYSCRNS opt_pcvt.h
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PCVT_SCANSET opt_pcvt.h
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PCVT_SCREENSAVER opt_pcvt.h
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PCVT_USEKBDSEC opt_pcvt.h
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PCVT_VT220KEYB opt_pcvt.h
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PCVT_GREENSAVER opt_pcvt.h
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# voxware options
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GUS_DMA2 opt_sound.h
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GUS_DMA opt_sound.h
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GUS_IRQ opt_sound.h
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# Video spigot
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SPIGOT_UNSECURE opt_spigot.h
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# -------------------------------
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# isdn4bsd: passive ISA cards
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# -------------------------------
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TEL_S0_8 opt_i4b.h
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TEL_S0_16 opt_i4b.h
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TEL_S0_16_3 opt_i4b.h
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AVM_A1 opt_i4b.h
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USR_STI opt_i4b.h
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ITKIX1 opt_i4b.h
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ELSA_PCC16 opt_i4b.h
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# -------------------------------
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# isdn4bsd: passive ISA PnP cards
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# -------------------------------
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CRTX_S0_P opt_i4b.h
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DRN_NGO opt_i4b.h
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TEL_S0_16_3_P opt_i4b.h
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SEDLBAUER opt_i4b.h
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DYNALINK opt_i4b.h
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ASUSCOM_IPAC opt_i4b.h
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ELSA_QS1ISA opt_i4b.h
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SIEMENS_ISURF2 opt_i4b.h
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EICON_DIVA opt_i4b.h
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COMPAQ_M610 opt_i4b.h
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# -------------------------------
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# isdn4bsd: passive PCI cards
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# -------------------------------
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ELSA_QS1PCI opt_i4b.h
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AVM_A1_PCI opt_i4b.h
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# -------------------------------
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# isdn4bsd: passive PCMCIA cards
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# -------------------------------
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#AVM_A1_PCMCIA opt_i4b.h
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# -------------------------------
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# isdn4bsd: misc options
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# -------------------------------
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# temporary workaround for SMP machines
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I4B_SMP_WORKAROUND opt_i4b.h
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# enable VJ compression code for ipr i/f
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IPR_VJ opt_i4b.h
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IPR_LOG opt_i4b.h
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# -------------------------------
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# oltr: build options
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# -------------------------------
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# Exclude microcode options
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OLTR_NO_TMS_MAC opt_oltr.h
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OLTR_NO_HAWKEYE_MAC opt_oltr.h
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OLTR_NO_BULLSEYE_MAC opt_oltr.h
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# Total number of ports controlled by the dgb(4) driver.
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# Defaults to NDGB*16.
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NDGBPORTS opt_dgb.h
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# Device options
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DEV_NPX opt_npx.h
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DEV_APM opt_apm.h
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DEV_SPLASH opt_splash.h
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# SMB/CIFS requester
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NETSMB opt_netsmb.h
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NETSMBCRYPTO opt_netsmb.h
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# SMB/CIFS filesystem
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SMBFS
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# -------------------------------
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# Polling device handling
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# -------------------------------
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DEVICE_POLLING opt_global.h
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# -------------------------------
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# EOF
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# -------------------------------
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