From 4d1827485acecac0016eaaec199e97697afdaa84 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Mon, 31 Jul 2023 14:02:11 +0800 Subject: [PATCH] tools/power/turbostat: Fix failure with new uncore sysfs On some platforms, turbostat fails during launch time like below, turbostat version 2023.03.17 - Len Brown ... cpu40: MSR_IA32_PACKAGE_THERM_STATUS: 0x884c0000 (24 C) cpu40: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C) turbostat: snapshot_sysfs_counter(/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz): No data available This is because new uncore sysfs is used on these platforms as introduced by commit 9b8dea80e3cb ("platform/x86/intel-uncore-freq: Support for cluster level controls"). With the new uncore sysfs interface, /sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz is still available, but reading it fails. How to support the fabric cluster level uncore sysfs is not settled yet, as a short term fix, clear the BIC_UNCORE_MHZ bit when new sysfs I/F is detected. Signed-off-by: Zhang Rui Reviewed-by: Len Brown --- tools/power/x86/turbostat/turbostat.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 9a10512e34078..9de1ff6f82ce0 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -4163,6 +4163,10 @@ static void intel_uncore_frequency_probe(void) if (access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00", R_OK)) return; + /* Cluster level sysfs not supported yet. */ + if (!access("/sys/devices/system/cpu/intel_uncore_frequency/uncore00", R_OK)) + return; + if (!access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz", R_OK)) BIC_PRESENT(BIC_UNCORE_MHZ); -- 2.30.2