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lttng-ust:upgrade 2.10.3 -> 2.10.4
-Upgrade from lttng-ust_2.10.3.bb to lttng-ust_2.10.4.bb. -lttng-ust/0001-compat-work-around-broken-_SC_NPROCESSORS_CONF-on-MU.patch Removed since this is included in 2.10.4 (From OE-Core rev: dc25e9525495e00940da7716cbba6bca96423acd) Signed-off-by: Zang Ruochen <zangrc.fnst@cn.fujitsu.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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committed by
Richard Purdie
parent
ca0eeb5c36
commit
1c7546e372
-109
@@ -1,109 +0,0 @@
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From 5de7c318804a7b1edce8562d4891b4c74aac0677 Mon Sep 17 00:00:00 2001
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From: Michael Jeanson <mjeanson@efficios.com>
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Date: Wed, 20 Mar 2019 11:07:35 -0400
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Subject: [PATCH] compat: work around broken _SC_NPROCESSORS_CONF on MUSL libc
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On MUSL libc the _SC_NPROCESSORS_CONF sysconf will report the number of
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CPUs allocated to the task based on the affinity mask instead of the
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total number of CPUs configured on the system.
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Upstream-Status: Accepted [1] [5de7c318804a7b1edce8562d4891b4c74aac0677]
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[1] https://lists.lttng.org/pipermail/lttng-dev/2019-March/028616.html
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Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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---
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libringbuffer/smp.c | 66 +++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 66 insertions(+)
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diff --git a/libringbuffer/smp.c b/libringbuffer/smp.c
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index 9e7114be..656a75da 100644
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--- a/libringbuffer/smp.c
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+++ b/libringbuffer/smp.c
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@@ -2,6 +2,7 @@
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* libringbuffer/smp.c
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*
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* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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+ * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@@ -26,6 +27,7 @@
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int __num_possible_cpus;
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+#if (defined(__GLIBC__) || defined( __UCLIBC__))
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void _get_num_possible_cpus(void)
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{
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int result;
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@@ -43,3 +45,67 @@ void _get_num_possible_cpus(void)
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return;
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__num_possible_cpus = result;
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}
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+
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+#else
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+
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+/*
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+ * The MUSL libc implementation of the _SC_NPROCESSORS_CONF sysconf does not
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+ * return the number of configured CPUs in the system but relies on the cpu
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+ * affinity mask of the current task.
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+ *
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+ * So instead we use a strategy similar to GLIBC's, counting the cpu
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+ * directories in "/sys/devices/system/cpu" and fallback on the value from
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+ * sysconf if it fails.
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+ */
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+
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+#include <dirent.h>
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+#include <limits.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <sys/types.h>
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+
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+#define __max(a,b) ((a)>(b)?(a):(b))
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+
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+void _get_num_possible_cpus(void)
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+{
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+ int result, count = 0;
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+ DIR *cpudir;
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+ struct dirent *entry;
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+
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+ cpudir = opendir("/sys/devices/system/cpu");
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+ if (cpudir == NULL)
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+ goto end;
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+
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+ /*
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+ * Count the number of directories named "cpu" followed by and
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+ * integer. This is the same strategy as glibc uses.
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+ */
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+ while ((entry = readdir(cpudir))) {
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+ if (entry->d_type == DT_DIR &&
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+ strncmp(entry->d_name, "cpu", 3) == 0) {
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+
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+ char *endptr;
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+ unsigned long cpu_num;
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+
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+ cpu_num = strtoul(entry->d_name + 3, &endptr, 10);
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+ if ((cpu_num < ULONG_MAX) && (endptr != entry->d_name + 3)
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+ && (*endptr == '\0')) {
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+ count++;
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+ }
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+ }
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+ }
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+
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+end:
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+ /*
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+ * Get the sysconf value as a fallback. Keep the highest number.
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+ */
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+ result = __max(sysconf(_SC_NPROCESSORS_CONF), count);
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+
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+ /*
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+ * If both methods failed, don't store the value.
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+ */
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+ if (result < 1)
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+ return;
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+ __num_possible_cpus = result;
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+}
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+#endif
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--
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2.17.1
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+2
-3
@@ -27,11 +27,10 @@ PE = "2"
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SRC_URI = "https://lttng.org/files/lttng-ust/lttng-ust-${PV}.tar.bz2 \
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file://lttng-ust-doc-examples-disable.patch \
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file://0001-compat-work-around-broken-_SC_NPROCESSORS_CONF-on-MU.patch \
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"
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SRC_URI[md5sum] = "ffcfa8c1ba9a52f002d240e936e9afa2"
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SRC_URI[sha256sum] = "9e8420f90d5f963f7aa32bc6d44adc1e491136f687c69ffb7a3075d33b40852b"
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SRC_URI[md5sum] = "19916ff0dec23c90f985586a8cbd1fd2"
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SRC_URI[sha256sum] = "75d5b4bb205c444a343e1297e14cd3a2503fc645a26710531cbd319c72c1a967"
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CVE_PRODUCT = "ust"
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