-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Nakajima, Jun wrote: >> Looking at the Linux context switch code, it can bang on MSR_FS_BASE > and >> MSR_KERNEL_GS_BASE. A high context switch rate between threads (which >> use %gs or %fs) can show an improvement with this. Things like kbuild >> probably won't as they use single threaded processes. > > Right.
In Linux there is no difference between single- and multi-threaded processes when it comes to setting up segment registers. Every x86-64 process uses %fs for TLS and every x86 process uses %gs. There are always variables accessed this way (errno, for instance). - -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQFGsiE02ijCOnn/RHQRAusOAJoDB29M1JXWybmgdONnIZP+O7aYoACgmDth 7EXTDup10Didr2vAKVpFjJc= =TruR -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
