Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun computing A pattern of bits indicating which bits in a second pattern are to be modified.
  • verb computing, transitive To mask (a value) using a bitmask.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

bit +‎ mask

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Examples

  • The GroupAffinity setting is a bitmask that is used to determine which CPUs in a processor group can be used for the thread pool in which the GroupAffinity mask is defined.

    Site Home psssql 2012

  • · Added new ASM/(E) MMX optimized ApplyBitmask routine for logical (bitwise) Xor/Or/And operations using a bitmask.

    Softpedia - Windows - All Softpedia Webscripts 2010

  • When you use it like an ordinary bitmask, then the performance is identical to the other, faster methods (no surprise there.)

    Planet MySQL 2010

  • CREATE TABLE bitmask (id serial, val int unsigned NOT NULL default '0', UNIQUE KEY (id), KEY (val)); insert into bitmask SELECT id, s+0 FROM settable;

    Planet MySQL 2010

  • Jan 19 21: 46: 43 kernel: [0.515515] pnp 00: 06: irq bitmask

    LinuxQuestions.org Byrnascus 2010

  • In fact it was surprising to me to see that the bitmask type queries were really not that much faster than the more normalised table structure with multiple rows.

    Planet MySQL 2010

  • It's really just a wrapper around bitmask operations -- it lest you work with them using text as well as numerical values.

    Planet MySQL 2010

  • SELECT * from bitmask WHERE val&3 = 3 LIMIT 1000 select * from settable where s&3 = 3 LIMIT 1000 select id FROM normalset group by id

    Planet MySQL 2010

  • Magic bitmask 0x1985 not found at 0x00180000: 0x9c29 instead jffs2_scan_eraseblock (): Magic bitmask 0x1985 not found at 0x00180004: 0x6f34 instead jffs2_scan_eraseblock (): Magic bitmask

    OpenWrt : News 2009

  • Magic bitmask 0x1985 not found at 0x00180000: 0x9c29 instead jffs2_scan_eraseblock (): Magic bitmask 0x1985 not found at 0x00180004: 0x6f34 instead jffs2_scan_eraseblock (): Magic bitmask

    OpenWrt : News 2009

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