Date: Sun, 24 Mar 2019 20:48:14 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236513] Different power states (C1/C2/...) per CPU core Message-ID: <bug-236513-227-5rFaaenuv3@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-236513-227@https.bugs.freebsd.org/bugzilla/> References: <bug-236513-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236513 --- Comment #10 from stockhausen@collogia.de --- Findings so far: acpi_cpu_cx_cst() runs fine for CPU core 0. With core 1 something is going wrong: 1. acpi_cpu_cx_cst() finds C2 state (WHAT WE EXPECT!) 2. in the function the valid states loop comes to this sequence: ... #endif { cx_ptr->res_rid = sc->cpu_cx_count; acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, &cx_ptr->res_rid, &cx_ptr->p_lvlx, RF_SHAREABLE); if (cx_ptr->p_lvlx) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: Got C%d - %d latency\n", ... 2a. acpi_PkgGas() is called 2b. sanity check in acpi_PkgGas() is ok 2c. acpi_PkgGas() calls acpi_bus_alloc_gas() that returns with rc=ENOMEM 2d. In main function cx_ptr->p_lvlx is NULL 2e. C2 is not added to the list of C states -- You are receiving this mail because: You are the assignee for the bug.
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