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qemu / qemu / d25f89c9e91d6c46b85969922411a211a6347a7d
commitd25f89c9e91d6c46b85969922411a211a6347a7d[log] [tgz]
authorJan Kiszka <jan.kiszka@siemens.com>Fri Jun 17 11:25:49 2011 +0200
committerAnthony Liguori <aliguori@us.ibm.com>Sat Jul 23 11:26:12 2011 -0500
tree6ef37246ff23527e8bc62fcf4f271bded16619d3
parent17604dac28b2410c021a4a52dcfa58e8803dfb24 [diff]
Register Linux dyntick timer as per-thread signal

Derived from kvm-tool patch
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/74309

Ingo Molnar pointed out that sending the timer signal to the whole
process, just blocking it everywhere, is suboptimal with an increasing
number of threads. QEMU is also using this pattern so far.

Linux provides a (non-portable) way to restrict the signal to a single
thread: We can use SIGEV_THREAD_ID unless we are forced to emulate
signalfd via an additional thread. That case could theoretically be
optimized as well, but it doesn't look worth bothering.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
3 files changed
tree: 6ef37246ff23527e8bc62fcf4f271bded16619d3
  1. audio/
  2. block/
  3. bsd-user/
  4. darwin-user/
  5. default-configs/
  6. docs/
  7. fpu/
  8. fsdev/
  9. gdb-xml/
  10. hw/
  11. libcacard/
  12. linux-headers/
  13. linux-user/
  14. net/
  15. pc-bios/
  16. qapi/
  17. qga/
  18. QMP/
  19. roms/
  20. scripts/
  21. slirp/
  22. sysconfigs/
  23. target-alpha/
  24. target-arm/
  25. target-cris/
  26. target-i386/
  27. target-lm32/
  28. target-m68k/
  29. target-microblaze/
  30. target-mips/
  31. target-ppc/
  32. target-s390x/
  33. target-sh4/
  34. target-sparc/
  35. target-unicore32/
  36. tcg/
  37. tests/
  38. ui/
  39. .gitignore
  40. .gitmodules
  41. a.out.h
  42. acl.c
  43. acl.h
  44. aes.c
  45. aes.h
  46. aio.c
  47. alpha-dis.c
  48. alpha.ld
  49. arch_init.c
  50. arch_init.h
  51. arm-dis.c
  52. arm-semi.c
  53. arm.ld
  54. async.c
  55. balloon.c
  56. balloon.h
  57. bitmap.c
  58. bitmap.h
  59. bitops.c
  60. bitops.h
  61. block-migration.c
  62. block-migration.h
  63. block.c
  64. block.h
  65. block_int.h
  66. blockdev.c
  67. blockdev.h
  68. bswap.h
  69. bt-host.c
  70. bt-host.h
  71. bt-vhci.c
  72. buffered_file.c
  73. buffered_file.h
  74. cache-utils.c
  75. cache-utils.h
  76. Changelog
  77. check-qdict.c
  78. check-qfloat.c
  79. check-qint.c
  80. check-qjson.c
  81. check-qlist.c
  82. check-qstring.c
  83. cmd.c
  84. cmd.h
  85. CODING_STYLE
  86. compatfd.c
  87. compatfd.h
  88. compiler.h
  89. config.h
  90. configure
  91. console.c
  92. console.h
  93. COPYING
  94. COPYING.LIB
  95. cpu-all.h
  96. cpu-common.h
  97. cpu-defs.h
  98. cpu-exec.c
  99. cpus.c
  100. cpus.h
  101. cris-dis.c
  102. cursor.c
  103. cursor_hidden.xpm
  104. cursor_left_ptr.xpm
  105. cutils.c
  106. def-helper.h
  107. device_tree.c
  108. device_tree.h
  109. dis-asm.h
  110. disas.c
  111. disas.h
  112. dma-helpers.c
  113. dma.h
  114. dyngen-exec.h
  115. elf.h
  116. envlist.c
  117. envlist.h
  118. error.c
  119. error.h
  120. error_int.h
  121. exec-all.h
  122. exec.c
  123. gdbstub.c
  124. gdbstub.h
  125. gen-icount.h
  126. HACKING
  127. hmp-commands.hx
  128. host-utils.c
  129. host-utils.h
  130. hpet.h
  131. hppa-dis.c
  132. hppa.ld
  133. i386-dis.c
  134. i386.ld
  135. ia64-dis.c
  136. ia64.ld
  137. input.c
  138. iohandler.c
  139. ioport-user.c
  140. ioport.c
  141. ioport.h
  142. iorange.h
  143. iov.c
  144. iov.h
  145. json-lexer.c
  146. json-lexer.h
  147. json-parser.c
  148. json-parser.h
  149. json-streamer.c
  150. json-streamer.h
  151. kvm-all.c
  152. kvm-stub.c
  153. kvm.h
  154. libfdt_env.h
  155. LICENSE
  156. linux-aio.c
  157. m68k-dis.c
  158. m68k-semi.c
  159. m68k.ld
  160. MAINTAINERS
  161. Makefile
  162. Makefile.dis
  163. Makefile.hw
  164. Makefile.objs
  165. Makefile.target
  166. Makefile.user
  167. microblaze-dis.c
  168. migration-exec.c
  169. migration-fd.c
  170. migration-tcp.c
  171. migration-unix.c
  172. migration.c
  173. migration.h
  174. mips-dis.c
  175. mips.ld
  176. module.c
  177. module.h
  178. monitor.c
  179. monitor.h
  180. nbd.c
  181. nbd.h
  182. net.c
  183. net.h
  184. notify.c
  185. notify.h
  186. os-posix.c
  187. os-win32.c
  188. osdep.c
  189. osdep.h
  190. oslib-posix.c
  191. oslib-win32.c
  192. path.c
  193. pci-ids.txt
  194. pflib.c
  195. pflib.h
  196. poison.h
  197. posix-aio-compat.c
  198. ppc-dis.c
  199. ppc.ld
  200. ppc64.ld
  201. qapi-schema-guest.json
  202. qapi-schema-test.json
  203. qbool.c
  204. qbool.h
  205. qdict-test-data.txt
  206. qdict.c
  207. qdict.h
  208. qemu-aio.h
  209. qemu-barrier.h
  210. qemu-char.c
  211. qemu-char.h
  212. qemu-common.h
  213. qemu-config.c
  214. qemu-config.h
  215. qemu-doc.texi
  216. qemu-error.c
  217. qemu-error.h
  218. qemu-ga.c
  219. qemu-img-cmds.hx
  220. qemu-img.c
  221. qemu-img.texi
  222. qemu-io.c
  223. qemu-lock.h
  224. qemu-log.h
  225. qemu-malloc.c
  226. qemu-nbd.c
  227. qemu-nbd.texi
  228. qemu-objects.h
  229. qemu-option.c
  230. qemu-option.h
  231. qemu-options.h
  232. qemu-options.hx
  233. qemu-os-posix.h
  234. qemu-os-win32.h
  235. qemu-progress.c
  236. qemu-queue.h
  237. qemu-sockets.c
  238. qemu-tech.texi
  239. qemu-thread-posix.c
  240. qemu-thread-posix.h
  241. qemu-thread-win32.c
  242. qemu-thread-win32.h
  243. qemu-thread.h
  244. qemu-timer-common.c
  245. qemu-timer.c
  246. qemu-timer.h
  247. qemu-tool.c
  248. qemu-x509.h
  249. qemu.sasl
  250. qemu_socket.h
  251. qerror.c
  252. qerror.h
  253. qfloat.c
  254. qfloat.h
  255. qint.c
  256. qint.h
  257. qjson.c
  258. qjson.h
  259. qlist.c
  260. qlist.h
  261. qmp-commands.hx
  262. qobject.h
  263. qstring.c
  264. qstring.h
  265. range.h
  266. readline.c
  267. readline.h
  268. README
  269. rules.mak
  270. rwhandler.c
  271. rwhandler.h
  272. s390-dis.c
  273. s390.ld
  274. savevm.c
  275. sh4-dis.c
  276. simpletrace.c
  277. simpletrace.h
  278. softmmu-semi.h
  279. softmmu_defs.h
  280. softmmu_exec.h
  281. softmmu_header.h
  282. softmmu_template.h
  283. sparc-dis.c
  284. sparc.ld
  285. sparc64.ld
  286. spice-qemu-char.c
  287. sysemu.h
  288. targphys.h
  289. tcg-runtime.c
  290. test-qmp-commands.c
  291. test-visitor.c
  292. thunk.c
  293. thunk.h
  294. TODO
  295. trace-events
  296. translate-all.c
  297. uboot_image.h
  298. usb-bsd.c
  299. usb-linux.c
  300. usb-redir.c
  301. usb-stub.c
  302. user-exec.c
  303. VERSION
  304. version.rc
  305. vgafont.h
  306. vl.c
  307. x86_64.ld
  308. xen-all.c
  309. xen-mapcache.c
  310. xen-mapcache.h
  311. xen-stub.c