Date: Fri, 6 Mar 2015 20:34:28 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r279699 - in head/sys: amd64/amd64 i386/i386 Message-ID: <201503062034.t26KYSP2063973@svn.freebsd.org>
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Author: jhb Date: Fri Mar 6 20:34:28 2015 New Revision: 279699 URL: https://svnweb.freebsd.org/changeset/base/279699 Log: Only schedule interrupts on a single hyperthread of a modern Intel CPU core by default. Previously we used a single hyperthread on Pentium4-era cores but used both hyperthreads on more recent CPUs. MFC after: 2 weeks Modified: head/sys/amd64/amd64/mp_machdep.c head/sys/i386/i386/mp_machdep.c Modified: head/sys/amd64/amd64/mp_machdep.c ============================================================================== --- head/sys/amd64/amd64/mp_machdep.c Fri Mar 6 16:43:54 2015 (r279698) +++ head/sys/amd64/amd64/mp_machdep.c Fri Mar 6 20:34:28 2015 (r279699) @@ -828,8 +828,8 @@ set_interrupt_apic_ids(void) continue; /* Don't let hyperthreads service interrupts. */ - if (hyperthreading_cpus > 1 && - apic_id % hyperthreading_cpus != 0) + if (cpu_logical > 1 && + apic_id % cpu_logical != 0) continue; intr_add_cpu(i); Modified: head/sys/i386/i386/mp_machdep.c ============================================================================== --- head/sys/i386/i386/mp_machdep.c Fri Mar 6 16:43:54 2015 (r279698) +++ head/sys/i386/i386/mp_machdep.c Fri Mar 6 20:34:28 2015 (r279699) @@ -842,8 +842,8 @@ set_interrupt_apic_ids(void) continue; /* Don't let hyperthreads service interrupts. */ - if (hyperthreading_cpus > 1 && - apic_id % hyperthreading_cpus != 0) + if (cpu_logical > 1 && + apic_id % cpu_logical != 0) continue; intr_add_cpu(i);
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