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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-04 16:09:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-04 16:09:53 -0700
commitef35ad26f8ff44d2c93e29952cdb336bda729d9d (patch)
treee2921072b9f4d820b18d6e5bc489b64ef2068668 /arch/x86
parent8efb90cf1e80129fad197b916714e1d01ee183d2 (diff)
parentf9b9f812235d53f774a083e88a5a23b517a69752 (diff)
downloadop-kernel-dev-ef35ad26f8ff44d2c93e29952cdb336bda729d9d.zip
op-kernel-dev-ef35ad26f8ff44d2c93e29952cdb336bda729d9d.tar.gz
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf changes from Ingo Molnar: "Kernel side changes: - Consolidate the PMU interrupt-disabled code amongst architectures (Vince Weaver) - misc fixes Tooling changes (new features, user visible changes): - Add support for pagefault tracing in 'trace', please see multiple examples in the changeset messages (Stanislav Fomichev). - Add pagefault statistics in 'trace' (Stanislav Fomichev) - Add header for columns in 'top' and 'report' TUI browsers (Jiri Olsa) - Add pagefault statistics in 'trace' (Stanislav Fomichev) - Add IO mode into timechart command (Stanislav Fomichev) - Fallback to syscalls:* when raw_syscalls:* is not available in the perl and python perf scripts. (Daniel Bristot de Oliveira) - Add --repeat global option to 'perf bench' to be used in benchmarks such as the existing 'futex' one, that was modified to use it instead of a local option. (Davidlohr Bueso) - Fix fd -> pathname resolution in 'trace', be it using /proc or a vfs_getname probe point. (Arnaldo Carvalho de Melo) - Add suggestion of how to set perf_event_paranoid sysctl, to help non-root users trying tools like 'trace' to get a working environment. (Arnaldo Carvalho de Melo) - Updates from trace-cmd for traceevent plugin_kvm plus args cleanup (Steven Rostedt, Jan Kiszka) - Support S/390 in 'perf kvm stat' (Alexander Yarygin) Tooling infrastructure changes: - Allow reserving a row for header purposes in the hists browser (Arnaldo Carvalho de Melo) - Various fixes and prep work related to supporting Intel PT (Adrian Hunter) - Introduce multiple debug variables control (Jiri Olsa) - Add callchain and additional sample information for python scripts (Joseph Schuchart) - More prep work to support Intel PT: (Adrian Hunter) - Polishing 'script' BTS output - 'inject' can specify --kallsym - VDSO is per machine, not a global var - Expose data addr lookup functions previously private to 'script' - Large mmap fixes in events processing - Include standard stringify macros in power pc code (Sukadev Bhattiprolu) Tooling cleanups: - Convert open coded equivalents to asprintf() (Andy Shevchenko) - Remove needless reassignments in 'trace' (Arnaldo Carvalho de Melo) - Cache the is_exit syscall test in 'trace) (Arnaldo Carvalho de Melo) - No need to reimplement err() in 'perf bench sched-messaging', drop barf(). (Davidlohr Bueso). - Remove ev_name argument from perf_evsel__hists_browse, can be obtained from the other parameters. (Jiri Olsa) Tooling fixes: - Fix memory leak in the 'sched-messaging' perf bench test. (Davidlohr Bueso) - The -o and -n 'perf bench mem' options are mutually exclusive, emit error when both are specified. (Davidlohr Bueso) - Fix scrollbar refresh row index in the ui browser, problem exposed now that headers will be added and will be allowed to be switched on/off. (Jiri Olsa) - Handle the num array type in python properly (Sebastian Andrzej Siewior) - Fix wrong condition for allocation failure (Jiri Olsa) - Adjust callchain based on DWARF debug info on powerpc (Sukadev Bhattiprolu) - Fix a risk for doing free on uninitialized pointer in traceevent lib (Rickard Strandqvist) - Update attr test with PERF_FLAG_FD_CLOEXEC flag (Jiri Olsa) - Enable close-on-exec flag on perf file descriptor (Yann Droneaud) - Fix build on gcc 4.4.7 (Arnaldo Carvalho de Melo) - Event ordering fixes (Jiri Olsa)" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (123 commits) Revert "perf tools: Fix jump label always changing during tracing" perf tools: Fix perf usage string leftover perf: Check permission only for parent tracepoint event perf record: Store PERF_RECORD_FINISHED_ROUND only for nonempty rounds perf record: Always force PERF_RECORD_FINISHED_ROUND event perf inject: Add --kallsyms parameter perf tools: Expose 'addr' functions so they can be reused perf session: Fix accounting of ordered samples queue perf powerpc: Include util/util.h and remove stringify macros perf tools: Fix build on gcc 4.4.7 perf tools: Add thread parameter to vdso__dso_findnew() perf tools: Add dso__type() perf tools: Separate the VDSO map name from the VDSO dso name perf tools: Add vdso__new() perf machine: Fix the lifetime of the VDSO temporary file perf tools: Group VDSO global variables into a structure perf session: Add ability to skip 4GiB or more perf session: Add ability to 'skip' a non-piped event stream perf tools: Pass machine to vdso__dso_findnew() perf tools: Add dso__data_size() ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/uapi/asm/Kbuild1
-rw-r--r--arch/x86/include/uapi/asm/kvm_perf.h16
-rw-r--r--arch/x86/kernel/cpu/perf_event_amd_uncore.c111
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_uncore.c5
4 files changed, 102 insertions, 31 deletions
diff --git a/arch/x86/include/uapi/asm/Kbuild b/arch/x86/include/uapi/asm/Kbuild
index 09409c4..3dec769 100644
--- a/arch/x86/include/uapi/asm/Kbuild
+++ b/arch/x86/include/uapi/asm/Kbuild
@@ -22,6 +22,7 @@ header-y += ipcbuf.h
header-y += ist.h
header-y += kvm.h
header-y += kvm_para.h
+header-y += kvm_perf.h
header-y += ldt.h
header-y += mce.h
header-y += mman.h
diff --git a/arch/x86/include/uapi/asm/kvm_perf.h b/arch/x86/include/uapi/asm/kvm_perf.h
new file mode 100644
index 0000000..3bb964f
--- /dev/null
+++ b/arch/x86/include/uapi/asm/kvm_perf.h
@@ -0,0 +1,16 @@
+#ifndef _ASM_X86_KVM_PERF_H
+#define _ASM_X86_KVM_PERF_H
+
+#include <asm/svm.h>
+#include <asm/vmx.h>
+#include <asm/kvm.h>
+
+#define DECODE_STR_LEN 20
+
+#define VCPU_ID "vcpu_id"
+
+#define KVM_ENTRY_TRACE "kvm:kvm_entry"
+#define KVM_EXIT_TRACE "kvm:kvm_exit"
+#define KVM_EXIT_REASON "exit_reason"
+
+#endif /* _ASM_X86_KVM_PERF_H */
diff --git a/arch/x86/kernel/cpu/perf_event_amd_uncore.c b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
index 3bbdf4c..30790d7 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
@@ -294,31 +294,41 @@ static struct amd_uncore *amd_uncore_alloc(unsigned int cpu)
cpu_to_node(cpu));
}
-static void amd_uncore_cpu_up_prepare(unsigned int cpu)
+static int amd_uncore_cpu_up_prepare(unsigned int cpu)
{
- struct amd_uncore *uncore;
+ struct amd_uncore *uncore_nb = NULL, *uncore_l2;
if (amd_uncore_nb) {
- uncore = amd_uncore_alloc(cpu);
- uncore->cpu = cpu;
- uncore->num_counters = NUM_COUNTERS_NB;
- uncore->rdpmc_base = RDPMC_BASE_NB;
- uncore->msr_base = MSR_F15H_NB_PERF_CTL;
- uncore->active_mask = &amd_nb_active_mask;
- uncore->pmu = &amd_nb_pmu;
- *per_cpu_ptr(amd_uncore_nb, cpu) = uncore;
+ uncore_nb = amd_uncore_alloc(cpu);
+ if (!uncore_nb)
+ goto fail;
+ uncore_nb->cpu = cpu;
+ uncore_nb->num_counters = NUM_COUNTERS_NB;
+ uncore_nb->rdpmc_base = RDPMC_BASE_NB;
+ uncore_nb->msr_base = MSR_F15H_NB_PERF_CTL;
+ uncore_nb->active_mask = &amd_nb_active_mask;
+ uncore_nb->pmu = &amd_nb_pmu;
+ *per_cpu_ptr(amd_uncore_nb, cpu) = uncore_nb;
}
if (amd_uncore_l2) {
- uncore = amd_uncore_alloc(cpu);
- uncore->cpu = cpu;
- uncore->num_counters = NUM_COUNTERS_L2;
- uncore->rdpmc_base = RDPMC_BASE_L2;
- uncore->msr_base = MSR_F16H_L2I_PERF_CTL;
- uncore->active_mask = &amd_l2_active_mask;
- uncore->pmu = &amd_l2_pmu;
- *per_cpu_ptr(amd_uncore_l2, cpu) = uncore;
+ uncore_l2 = amd_uncore_alloc(cpu);
+ if (!uncore_l2)
+ goto fail;
+ uncore_l2->cpu = cpu;
+ uncore_l2->num_counters = NUM_COUNTERS_L2;
+ uncore_l2->rdpmc_base = RDPMC_BASE_L2;
+ uncore_l2->msr_base = MSR_F16H_L2I_PERF_CTL;
+ uncore_l2->active_mask = &amd_l2_active_mask;
+ uncore_l2->pmu = &amd_l2_pmu;
+ *per_cpu_ptr(amd_uncore_l2, cpu) = uncore_l2;
}
+
+ return 0;
+
+fail:
+ kfree(uncore_nb);
+ return -ENOMEM;
}
static struct amd_uncore *
@@ -441,7 +451,7 @@ static void uncore_dead(unsigned int cpu, struct amd_uncore * __percpu *uncores)
if (!--uncore->refcnt)
kfree(uncore);
- *per_cpu_ptr(amd_uncore_nb, cpu) = NULL;
+ *per_cpu_ptr(uncores, cpu) = NULL;
}
static void amd_uncore_cpu_dead(unsigned int cpu)
@@ -461,7 +471,8 @@ amd_uncore_cpu_notifier(struct notifier_block *self, unsigned long action,
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
- amd_uncore_cpu_up_prepare(cpu);
+ if (amd_uncore_cpu_up_prepare(cpu))
+ return notifier_from_errno(-ENOMEM);
break;
case CPU_STARTING:
@@ -501,20 +512,33 @@ static void __init init_cpu_already_online(void *dummy)
amd_uncore_cpu_online(cpu);
}
+static void cleanup_cpu_online(void *dummy)
+{
+ unsigned int cpu = smp_processor_id();
+
+ amd_uncore_cpu_dead(cpu);
+}
+
static int __init amd_uncore_init(void)
{
- unsigned int cpu;
+ unsigned int cpu, cpu2;
int ret = -ENODEV;
if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
- return -ENODEV;
+ goto fail_nodev;
if (!cpu_has_topoext)
- return -ENODEV;
+ goto fail_nodev;
if (cpu_has_perfctr_nb) {
amd_uncore_nb = alloc_percpu(struct amd_uncore *);
- perf_pmu_register(&amd_nb_pmu, amd_nb_pmu.name, -1);
+ if (!amd_uncore_nb) {
+ ret = -ENOMEM;
+ goto fail_nb;
+ }
+ ret = perf_pmu_register(&amd_nb_pmu, amd_nb_pmu.name, -1);
+ if (ret)
+ goto fail_nb;
printk(KERN_INFO "perf: AMD NB counters detected\n");
ret = 0;
@@ -522,20 +546,28 @@ static int __init amd_uncore_init(void)
if (cpu_has_perfctr_l2) {
amd_uncore_l2 = alloc_percpu(struct amd_uncore *);
- perf_pmu_register(&amd_l2_pmu, amd_l2_pmu.name, -1);
+ if (!amd_uncore_l2) {
+ ret = -ENOMEM;
+ goto fail_l2;
+ }
+ ret = perf_pmu_register(&amd_l2_pmu, amd_l2_pmu.name, -1);
+ if (ret)
+ goto fail_l2;
printk(KERN_INFO "perf: AMD L2I counters detected\n");
ret = 0;
}
if (ret)
- return -ENODEV;
+ goto fail_nodev;
cpu_notifier_register_begin();
/* init cpus already online before registering for hotplug notifier */
for_each_online_cpu(cpu) {
- amd_uncore_cpu_up_prepare(cpu);
+ ret = amd_uncore_cpu_up_prepare(cpu);
+ if (ret)
+ goto fail_online;
smp_call_function_single(cpu, init_cpu_already_online, NULL, 1);
}
@@ -543,5 +575,30 @@ static int __init amd_uncore_init(void)
cpu_notifier_register_done();
return 0;
+
+
+fail_online:
+ for_each_online_cpu(cpu2) {
+ if (cpu2 == cpu)
+ break;
+ smp_call_function_single(cpu, cleanup_cpu_online, NULL, 1);
+ }
+ cpu_notifier_register_done();
+
+ /* amd_uncore_nb/l2 should have been freed by cleanup_cpu_online */
+ amd_uncore_nb = amd_uncore_l2 = NULL;
+ if (cpu_has_perfctr_l2)
+ perf_pmu_unregister(&amd_l2_pmu);
+fail_l2:
+ if (cpu_has_perfctr_nb)
+ perf_pmu_unregister(&amd_nb_pmu);
+ if (amd_uncore_l2)
+ free_percpu(amd_uncore_l2);
+fail_nb:
+ if (amd_uncore_nb)
+ free_percpu(amd_uncore_nb);
+
+fail_nodev:
+ return ret;
}
device_initcall(amd_uncore_init);
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index ae6552a..cfc6f9d 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -2947,10 +2947,7 @@ again:
* extra registers. If we failed to take an extra
* register, try the alternative.
*/
- if (idx % 2)
- idx--;
- else
- idx++;
+ idx ^= 1;
if (idx != reg1->idx % 6) {
if (idx == 2)
config1 >>= 8;
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