Add Memory Bandwidth Monitoring(MBM) for VMs. Two types of monitoring
are supported: total and local memory bandwidth monitoring. To use it,
CMT should be enabled in hypervisor.
Signed-off-by: Chao Peng chao.p.p...@linux.intel.com
---
docs/man/xl.pod.1 |9 +
tools/libxc/include/xenctrl.h |2 +
tools/libxc/xc_psr.c |8
tools/libxl/libxl.h |8
tools/libxl/libxl_psr.c | 84 +
tools/libxl/libxl_types.idl |2 +
tools/libxl/xl_cmdimpl.c | 21 ++-
tools/libxl/xl_cmdtable.c |4 +-
8 files changed, 136 insertions(+), 2 deletions(-)
diff --git a/docs/man/xl.pod.1 b/docs/man/xl.pod.1
index 6b89ba8..0370625 100644
--- a/docs/man/xl.pod.1
+++ b/docs/man/xl.pod.1
@@ -1461,6 +1461,13 @@ is domain level. To monitor a specific domain, just
attach the domain id with
the monitoring service. When the domain doesn't need to be monitored any more,
detach the domain id from the monitoring service.
+Intel Broadwell and later server platforms also offer total/local memory
+bandwidth monitoring. Xen supports per-domain monitoring for these two
+additional monitoring types. Both memory bandwidth monitoring and L3 cache
+occupancy monitoring share the same set of underground monitoring service. Once
+a domain is attached to the monitoring service, monitoring data can be showed
+for any of these monitoring types.
+
=over 4
=item Bpsr-cmt-attach [Idomain-id]
@@ -1476,6 +1483,8 @@ detach: Detach the platform shared resource monitoring
service from a domain.
Show monitoring data for a certain domain or all domains. Current supported
monitor types are:
- cache-occupancy: showing the L3 cache occupancy.
+ - total-mem-bandwidth: showing the total memory bandwidth.
+ - local-mem-bandwidth: showing the local memory bandwidth.
=back
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index c6e9e3e..06366b5 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2688,6 +2688,8 @@ int xc_resource_op(xc_interface *xch, uint32_t nr_ops,
xc_resource_op_t *ops);
#if defined(__i386__) || defined(__x86_64__)
enum xc_psr_cmt_type {
XC_PSR_CMT_L3_OCCUPANCY,
+XC_PSR_CMT_TOTAL_MEM_BANDWIDTH,
+XC_PSR_CMT_LOCAL_MEM_BANDWIDTH,
};
typedef enum xc_psr_cmt_type xc_psr_cmt_type;
int xc_psr_cmt_attach(xc_interface *xch, uint32_t domid);
diff --git a/tools/libxc/xc_psr.c b/tools/libxc/xc_psr.c
index a9881a4..5858693 100644
--- a/tools/libxc/xc_psr.c
+++ b/tools/libxc/xc_psr.c
@@ -23,6 +23,8 @@
#define IA32_CMT_CTR_ERROR_MASK (0x3ull 62)
#define EVTID_L3_OCCUPANCY 0x1
+#define EVTID_TOTAL_MEM_BANDWIDTH 0x2
+#define EVTID_LOCAL_MEM_BANDWIDTH 0x3
int xc_psr_cmt_attach(xc_interface *xch, uint32_t domid)
{
@@ -168,6 +170,12 @@ int xc_psr_cmt_get_data(xc_interface *xch, uint32_t rmid,
uint32_t cpu,
case XC_PSR_CMT_L3_OCCUPANCY:
evtid = EVTID_L3_OCCUPANCY;
break;
+case XC_PSR_CMT_TOTAL_MEM_BANDWIDTH:
+evtid = EVTID_TOTAL_MEM_BANDWIDTH;
+break;
+case XC_PSR_CMT_LOCAL_MEM_BANDWIDTH:
+evtid = EVTID_LOCAL_MEM_BANDWIDTH;
+break;
default:
return -1;
}
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 596d2a0..347ef52 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -1462,6 +1462,14 @@ int libxl_psr_cmt_get_cache_occupancy(libxl_ctx *ctx,
uint32_t domid,
uint32_t socketid,
uint32_t *l3_cache_occupancy);
+int libxl_psr_cmt_get_total_mem_bandwidth(libxl_ctx *ctx,
+ uint32_t domid,
+ uint32_t socketid,
+ uint32_t *bandwidth);
+int libxl_psr_cmt_get_local_mem_bandwidth(libxl_ctx *ctx,
+ uint32_t domid,
+ uint32_t socketid,
+ uint32_t *bandwidth);
#endif
/* misc */
diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index c88c421..0c3e4e6 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -18,6 +18,7 @@
#define IA32_QM_CTR_ERROR_MASK (0x3ul 62)
+#define MBM_SAMPLE_RETRY_MAX 4
static void libxl__psr_cmt_log_err_msg(libxl__gc *gc, int err)
{
@@ -240,6 +241,89 @@ out:
return rc;
}
+static int libxl__psr_cmt_get_mem_bandwidth(libxl__gc *gc,
+uint32_t domid,
+xc_psr_cmt_type type,
+uint32_t socketid,
+uint32_t *bandwidth)
+{
+uint64_t sample1, sample2;
+uint32_t upscaling_factor;
+int retry_attempts = 0;
+int rc;
+
