** Patch added: "cpuinfo_0.0~git20190201.d5e37ad-1ubuntu1.debdiff"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1840847/+attachment/5283577/+files/cpuinfo_0.0~git20190201.d5e37ad-1ubuntu1.debdiff
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Description changed:
From bug:
https://bugs.launchpad.net/bugs/1840511
clockhouse builds test started failing because of the presence of stderr
whenever using the function:
cpuinfo_linux_get_max_processors_count(void)
From cpuid library.
This happens because:
----
#if defined(__ANDROID__) && !defined(CPU_SETSIZE)
/*
* Android NDK headers before platform 21 do not define CPU_SETSIZE,
* so we hard-code its value, as defined in platform 21 headers
*/
#if defined(__LP64__)
static const uint32_t default_max_processors_count = 1024;
#else
static const uint32_t default_max_processors_count = 32;
#endif
#else
static const uint32_t default_max_processors_count = CPU_SETSIZE;
#endif
----
#if !defined(__ANDROID__)
/*
* sched.h is only used for CPU_SETSIZE constant.
* Android NDK headers before platform 21 do have this constant in sched.h
*/
#include <sched.h>
#endif
----
and resolving includes:
x86_64-linux-gnu/bits/cpu-set.h:
/* Size definition for CPU sets. */
#define __CPU_SETSIZE 1024
----
And the warning:
Warning in cpuinfo: kernel_max value of 8191 parsed from
/sys/devices/system/cpu/kernel_max exceeds platform-default limit 1023
Will always be displayed in Ubuntu OS, when it should NOT (does not make
any sense to trigger a warning for something that can't be changed).
+ FOR THE KERNEL TEAM:
+
Should ubuntu update sched.h and/or cpu-set.h to reflect its decision in
using 8192 max CPUs ?
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https://bugs.launchpad.net/bugs/1840847
Title:
cpuinfo_linux_get_max_processors_count always warns Ubuntu default MAX
cpu values (stderr)
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