From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: andriy.shevchenko@linux.intel.com
Cc: platform-driver-x86@vger.kernel.org, prarit@redhat.com,
linux-kernel@vger.kernel.org,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH 06/27] tools/power/x86/intel-speed-select: Max CPU count calculation when CPU0 is offline
Date: Thu, 5 Mar 2020 14:45:17 -0800 [thread overview]
Message-ID: <20200305224538.490864-7-srinivas.pandruvada@linux.intel.com> (raw)
In-Reply-To: <20200305224538.490864-1-srinivas.pandruvada@linux.intel.com>
Currently /sys/devices/system/cpu/cpu0/topology/thread_siblings is used to
get the max CPU count. But when CPU0 is offline, then this file will be
absent.
So add processing so that we can get count from any first CPU in the
system. which is online.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
.../power/x86/intel-speed-select/isst-config.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index b8f4846d7c78..c773c6cc02a5 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -316,10 +316,24 @@ static void set_max_cpu_num(void)
{
FILE *filep;
unsigned long dummy;
+ int i;
topo_max_cpus = 0;
- filep = fopen_or_exit(
- "/sys/devices/system/cpu/cpu0/topology/thread_siblings", "r");
+ for (i = 0; i < 256; ++i) {
+ char path[256];
+
+ snprintf(path, sizeof(path),
+ "/sys/devices/system/cpu/cpu%d/topology/thread_siblings", i);
+ filep = fopen(path, "r");
+ if (filep)
+ break;
+ }
+
+ if (!filep) {
+ fprintf(stderr, "Can't get max cpu number\n");
+ exit(0);
+ }
+
while (fscanf(filep, "%lx,", &dummy) == 1)
topo_max_cpus += BITMASK_SIZE;
fclose(filep);
--
2.24.1
next prev parent reply other threads:[~2020-03-05 22:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 22:45 [PATCH 00/27] tools/power/x86/intel-speed-select: Enhancements Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 01/27] tools/power/x86/intel-speed-select: Warn for invalid package id Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 02/27] tools/power/x86/intel-speed-select: Make target CPU optional for core-power info Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 03/27] tools/power/x86/intel-speed-select: Enhance core-power info command Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 04/27] tools/power/x86/intel-speed-select: Use more verbiage for clos information Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 05/27] tools/power/x86/intel-speed-select: Special handling for CPU 0 online/offline Srinivas Pandruvada
2020-03-05 22:45 ` Srinivas Pandruvada [this message]
2020-03-05 22:45 ` [PATCH 07/27] tools/power/x86/intel-speed-select: Store topology information Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 08/27] tools/power/x86/intel-speed-select: Helpful warning for missing kernel interface Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 09/27] tools/power/x86/intel-speed-select: Enhance help Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 10/27] tools/power/x86/intel-speed-select: Enhance --info option Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 11/27] tools/power/x86/intel-speed-select: Add an API for error/information print Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 12/27] tools/power/x86/intel-speed-select: Improve error display for perf-profile feature Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 13/27] tools/power/x86/intel-speed-select: Check feature status first Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 14/27] tools/power/x86/intel-speed-select: Display error for invalid priority type Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 15/27] tools/power/x86/intel-speed-select: Enhance help for core-power assoc Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 16/27] tools/power/x86/intel-speed-select: Improve output of perf-profile commands Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 17/27] tools/power/x86/intel-speed-select: Improve error display for base-freq feature Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 18/27] tools/power/x86/intel-speed-select: Improve error display for turbo-freq feature Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 19/27] tools/power/x86/intel-speed-select: Kernel interface error handling Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 20/27] tools/power/x86/intel-speed-select: Improve core-power result and error display Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 21/27] tools/power/x86/intel-speed-select: Show error for invalid CPUs in the options Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 22/27] tools/power/x86/intel-speed-select: Improve CLX commands Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 23/27] tools/power/x86/intel-speed-select: Fix avx options for turbo-freq feature Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 24/27] tools/power/x86/intel-speed-select: Print friendly warning for bad command line Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 25/27] tools/power/x86/intel-speed-select: Add display for enabled cpus count Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 26/27] tools/power/x86/intel-speed-select: Avoid duplicate Package strings for json Srinivas Pandruvada
2020-03-05 22:45 ` [PATCH 27/27] tools/power/x86/intel-speed-select: Update version Srinivas Pandruvada
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