[Xen-devel] [PATCH] Xenperf Bug Fix

["Wilson, Stephen" <Stephen.Wilson@xxxxxxx>]

This patch fixes/enables the following:

* Fix typo bug in xenperf tool.

* Increase the size of percpu data area from 4K to 8K to accommodate larger PERFCOUNTER_ARRAY.

* Increase the size of svmexits PERFCOUNTER_ARRAY to include nested paging perf counter.

Signed-off-by: Stephen Wilson <stephen.wilson@xxxxxxx>

diff -r b28ae5f00553 tools/misc/xenperf.c

--- a/tools/misc/xenperf.c      Tue Oct 23 09:26:43 2007 +0100

+++ b/tools/misc/xenperf.c      Mon Oct 29 16:24:53 2007 +0000

@@ -161,7 +161,7 @@ int main(int argc, char *argv[])

     if ( pcd == NULL

          || lock_pages(pcd, sizeof(*pcd) * num_desc) != 0

          || pcv == NULL

-         || lock_pages(pcd, sizeof(*pcv) * num_val) != 0)

+         || lock_pages(pcv, sizeof(*pcv) * num_val) != 0)

     {

         fprintf(stderr, "Could not alloc or lock buffers: %d (%s)\n",

                 errno, strerror(errno));

diff -r b28ae5f00553 xen/include/asm-x86/percpu.h

--- a/xen/include/asm-x86/percpu.h      Tue Oct 23 09:26:43 2007 +0100

+++ b/xen/include/asm-x86/percpu.h      Mon Oct 29 17:02:16 2007 +0000

@@ -1,7 +1,7 @@

 #ifndef __X86_PERCPU_H__

 #define __X86_PERCPU_H__

-#define PERCPU_SHIFT 12

+#define PERCPU_SHIFT 13

 #define PERCPU_SIZE  (1UL << PERCPU_SHIFT)

 /* Separate out the type, so (int[3], foo) works. */

diff -r b28ae5f00553 xen/include/asm-x86/perfc_defn.h

--- a/xen/include/asm-x86/perfc_defn.h  Tue Oct 23 09:26:43 2007 +0100

+++ b/xen/include/asm-x86/perfc_defn.h  Mon Oct 29 16:26:31 2007 +0000

@@ -9,7 +9,7 @@ PERFCOUNTER_ARRAY(vmexits,

 PERFCOUNTER_ARRAY(vmexits,              "vmexits", VMX_PERF_EXIT_REASON_SIZE)

 PERFCOUNTER_ARRAY(cause_vector,         "cause vector", VMX_PERF_VECTOR_SIZE)

-#define SVM_PERF_EXIT_REASON_SIZE (1+136)

+#define SVM_PERF_EXIT_REASON_SIZE (1+1024)

 PERFCOUNTER_ARRAY(svmexits,             "SVMexits", SVM_PERF_EXIT_REASON_SIZE)

 PERFCOUNTER(seg_fixups,             "segmentation fixups")

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