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googlers / jrn / git / 833e3df17188e48b2d31db0966a4051dad5e03b9
commit833e3df17188e48b2d31db0966a4051dad5e03b9[log] [tgz]
authorAndreas Ericsson <ae@op5.se>Fri Feb 22 20:11:56 2008 -0600
committerJunio C Hamano <gitster@pobox.com>Sat Feb 23 12:00:32 2008 -0800
tree265fb9405efb644ff564ac1b77991d62795006a2
parent923d44aeb7cb6d21eeb459fdc1b58137e37c2b1c [diff]
pack-objects: Add runtime detection of online CPU's

Packing objects can be done in parallell nowadays, but it's
only done if the config option pack.threads is set to a value
above 1. Because of that, the code-path used is often not the
most optimal one.

This patch adds a routine to detect the number of online CPU's
at runtime (online_cpus()). When pack.threads (or --threads=) is
given a value of 0, the number of threads is set to the number of
online CPU's. This feature is also documented.

As per Nicolas Pitre's recommendations, the default is still to
run pack-objects single-threaded unless explicitly activated,
either by configuration or by command line parameter.

The routine online_cpus() is a rework of "numcpus.c", written by
one Philip Willoughby <pgw99@doc.ic.ac.uk>. numcpus.c is in the
public domain and can presently be downloaded from
http://csgsoft.doc.ic.ac.uk/numcpus/

Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
6 files changed
tree: 265fb9405efb644ff564ac1b77991d62795006a2
  1. arm/
  2. compat/
  3. contrib/
  4. Documentation/
  5. git-gui/
  6. gitk-git/
  7. gitweb/
  8. mozilla-sha1/
  9. perl/
  10. ppc/
  11. t/
  12. templates/
  13. xdiff/
  14. RelNotes ⇨ Documentation/RelNotes-1.5.5.txt
  15. .gitattributes
  16. .gitignore
  17. .mailmap
  18. alloc.c
  19. archive-tar.c
  20. archive-zip.c
  21. archive.c
  22. archive.h
  23. attr.c
  24. attr.h
  25. base85.c
  26. blob.c
  27. blob.h
  28. builtin-add.c
  29. builtin-annotate.c
  30. builtin-apply.c
  31. builtin-archive.c
  32. builtin-blame.c
  33. builtin-branch.c
  34. builtin-bundle.c
  35. builtin-cat-file.c
  36. builtin-check-attr.c
  37. builtin-check-ref-format.c
  38. builtin-checkout-index.c
  39. builtin-clean.c
  40. builtin-commit-tree.c
  41. builtin-commit.c
  42. builtin-config.c
  43. builtin-count-objects.c
  44. builtin-describe.c
  45. builtin-diff-files.c
  46. builtin-diff-index.c
  47. builtin-diff-tree.c
  48. builtin-diff.c
  49. builtin-fast-export.c
  50. builtin-fetch--tool.c
  51. builtin-fetch-pack.c
  52. builtin-fetch.c
  53. builtin-fmt-merge-msg.c
  54. builtin-for-each-ref.c
  55. builtin-fsck.c
  56. builtin-gc.c
  57. builtin-grep.c
  58. builtin-http-fetch.c
  59. builtin-init-db.c
  60. builtin-log.c
  61. builtin-ls-files.c
  62. builtin-ls-remote.c
  63. builtin-ls-tree.c
  64. builtin-mailinfo.c
  65. builtin-mailsplit.c
  66. builtin-merge-base.c
  67. builtin-merge-file.c
  68. builtin-merge-ours.c
  69. builtin-mv.c
  70. builtin-name-rev.c
  71. builtin-pack-objects.c
  72. builtin-pack-refs.c
  73. builtin-prune-packed.c
  74. builtin-prune.c
  75. builtin-push.c
  76. builtin-read-tree.c
  77. builtin-reflog.c
  78. builtin-rerere.c
  79. builtin-reset.c
  80. builtin-rev-list.c
  81. builtin-rev-parse.c
  82. builtin-revert.c
  83. builtin-rm.c
  84. builtin-send-pack.c
  85. builtin-shortlog.c
  86. builtin-show-branch.c
  87. builtin-show-ref.c
  88. builtin-stripspace.c
  89. builtin-symbolic-ref.c
  90. builtin-tag.c
  91. builtin-tar-tree.c
  92. builtin-unpack-objects.c
  93. builtin-update-index.c
  94. builtin-update-ref.c
  95. builtin-upload-archive.c
  96. builtin-verify-pack.c
  97. builtin-verify-tag.c
  98. builtin-write-tree.c
  99. builtin.h
  100. bundle.c
  101. bundle.h
  102. cache-tree.c
  103. cache-tree.h
  104. cache.h
  105. check-builtins.sh
  106. check-racy.c
  107. color.c
  108. color.h
  109. combine-diff.c
  110. command-list.txt
  111. commit.c
  112. commit.h
  113. config.c
  114. config.mak.in
  115. configure.ac
  116. connect.c
  117. convert.c
  118. copy.c
  119. COPYING
  120. csum-file.c
  121. csum-file.h
  122. ctype.c
  123. daemon.c
  124. date.c
  125. decorate.c
  126. decorate.h
  127. delta.h
  128. diff-delta.c
  129. diff-lib.c
  130. diff.c
  131. diff.h
  132. diffcore-break.c
  133. diffcore-delta.c
  134. diffcore-order.c
  135. diffcore-pickaxe.c
  136. diffcore-rename.c
  137. diffcore.h
  138. dir.c
  139. dir.h
  140. dump-cache-tree.c
  141. entry.c
  142. environment.c
  143. exec_cmd.c
  144. exec_cmd.h
  145. fast-import.c
  146. fetch-pack.h
  147. fixup-builtins
  148. generate-cmdlist.sh
  149. git-add--interactive.perl
  150. git-am.sh
  151. git-archimport.perl
  152. git-bisect.sh
  153. git-checkout.sh
  154. git-clone.sh
  155. git-compat-util.h
  156. git-cvsexportcommit.perl
  157. git-cvsimport.perl
  158. git-cvsserver.perl
  159. git-filter-branch.sh
  160. git-instaweb.sh
  161. git-lost-found.sh
  162. git-merge-octopus.sh
  163. git-merge-one-file.sh
  164. git-merge-resolve.sh
  165. git-merge-stupid.sh
  166. git-merge.sh
  167. git-mergetool.sh
  168. git-parse-remote.sh
  169. git-pull.sh
  170. git-quiltimport.sh
  171. git-rebase--interactive.sh
  172. git-rebase.sh
  173. git-relink.perl
  174. git-remote.perl
  175. git-repack.sh
  176. git-request-pull.sh
  177. git-send-email.perl
  178. git-sh-setup.sh
  179. git-stash.sh
  180. git-submodule.sh
  181. git-svn.perl
  182. GIT-VERSION-GEN
  183. git-web--browse.sh
  184. git.c
  185. git.spec.in
  186. grep.c
  187. grep.h
  188. hash-object.c
  189. hash.c
  190. hash.h
  191. help.c
  192. http-push.c
  193. http-walker.c
  194. http.c
  195. http.h
  196. ident.c
  197. imap-send.c
  198. index-pack.c
  199. INSTALL
  200. interpolate.c
  201. interpolate.h
  202. list-objects.c
  203. list-objects.h
  204. lockfile.c
  205. log-tree.c
  206. log-tree.h
  207. mailmap.c
  208. mailmap.h
  209. Makefile
  210. match-trees.c
  211. merge-file.c
  212. merge-index.c
  213. merge-recursive.c
  214. merge-tree.c
  215. mktag.c
  216. mktree.c
  217. object-refs.c
  218. object.c
  219. object.h
  220. pack-check.c
  221. pack-redundant.c
  222. pack-write.c
  223. pack.h
  224. pager.c
  225. parse-options.c
  226. parse-options.h
  227. patch-delta.c
  228. patch-id.c
  229. patch-ids.c
  230. patch-ids.h
  231. path-list.c
  232. path-list.h
  233. path.c
  234. pkt-line.c
  235. pkt-line.h
  236. pretty.c
  237. progress.c
  238. progress.h
  239. quote.c
  240. quote.h
  241. reachable.c
  242. reachable.h
  243. read-cache.c
  244. README
  245. receive-pack.c
  246. reflog-walk.c
  247. reflog-walk.h
  248. refs.c
  249. refs.h
  250. remote.c
  251. remote.h
  252. revision.c
  253. revision.h
  254. run-command.c
  255. run-command.h
  256. send-pack.h
  257. server-info.c
  258. setup.c
  259. sha1_file.c
  260. sha1_name.c
  261. shallow.c
  262. shell.c
  263. show-index.c
  264. sideband.c
  265. sideband.h
  266. strbuf.c
  267. strbuf.h
  268. symlinks.c
  269. tag.c
  270. tag.h
  271. tar.h
  272. test-absolute-path.c
  273. test-chmtime.c
  274. test-date.c
  275. test-delta.c
  276. test-genrandom.c
  277. test-match-trees.c
  278. test-parse-options.c
  279. test-sha1.c
  280. test-sha1.sh
  281. thread-utils.c
  282. thread-utils.h
  283. trace.c
  284. transport.c
  285. transport.h
  286. tree-diff.c
  287. tree-walk.c
  288. tree-walk.h
  289. tree.c
  290. tree.h
  291. unpack-file.c
  292. unpack-trees.c
  293. unpack-trees.h
  294. update-server-info.c
  295. upload-pack.c
  296. usage.c
  297. utf8.c
  298. utf8.h
  299. var.c
  300. walker.c
  301. walker.h
  302. write_or_die.c
  303. ws.c
  304. wt-status.c
  305. wt-status.h
  306. xdiff-interface.c
  307. xdiff-interface.h