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 |
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.. | ||
agp_ali.c | ||
agp_amd.c | ||
agp_i810.c | ||
agp_if.m | ||
agp_intel.c | ||
agp_sis.c | ||
agp_via.c | ||
agp.c | ||
agppriv.h | ||
agpreg.h | ||
agpvar.h | ||
alpm.c | ||
amd.c | ||
amd.h | ||
amdpm.c | ||
cy_pci.c | ||
cy_pcireg.h | ||
dc21040reg.h | ||
if_dc.c | ||
if_dcreg.h | ||
if_de.c | ||
if_devar.h | ||
if_en_pci.c | ||
if_mn.c | ||
if_pcn.c | ||
if_pcnreg.h | ||
if_rl.c | ||
if_rlreg.h | ||
if_sf.c | ||
if_sfreg.h | ||
if_sis.c | ||
if_sisreg.h | ||
if_sk.c | ||
if_skreg.h | ||
if_ste.c | ||
if_stereg.h | ||
if_ti.c | ||
if_tireg.h | ||
if_tl.c | ||
if_tlreg.h | ||
if_tx.c | ||
if_txvar.h | ||
if_vr.c | ||
if_vrreg.h | ||
if_wb.c | ||
if_wbreg.h | ||
if_xl.c | ||
if_xlreg.h | ||
intpm.c | ||
intpmreg.h | ||
locate.pl | ||
meteor_reg.h | ||
meteor.c | ||
ncr.c | ||
ncrreg.h | ||
ohci_pci.c | ||
simos.c | ||
simos.h | ||
ti_fw2.h | ||
ti_fw.h | ||
uhci_pci.c | ||
xmaciireg.h | ||
xrpu.c |