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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] libxc: Support set affinity for more than 64 CPUs.
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1268817447 0
# Node ID b64a8d2a80ad69b57e68c299009ba2cbe3ed43d0
# Parent 95f5a4ce8f24cccbfc25021687c43229f3a7df5f
libxc: Support set affinity for more than 64 CPUs.
There are more than 64 cpus on new intel platform especially on NUMA
system, so that we need break the pcpu limit (that is 64) when set
affinity of a VCPU.
Signed-off-by: James (song wei) <jsong@xxxxxxxxxx>
---
tools/libxc/xc_domain.c | 39 +++++++++++++------
tools/libxc/xenctrl.h | 6 ++-
tools/python/xen/lowlevel/xc/xc.c | 75 ++++++++++++++++++++++++++++----------
3 files changed, 87 insertions(+), 33 deletions(-)
diff -r 95f5a4ce8f24 -r b64a8d2a80ad tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c Wed Mar 17 08:35:13 2010 +0000
+++ b/tools/libxc/xc_domain.c Wed Mar 17 09:17:27 2010 +0000
@@ -98,23 +98,28 @@ int xc_vcpu_setaffinity(int xc_handle,
int xc_vcpu_setaffinity(int xc_handle,
uint32_t domid,
int vcpu,
- uint64_t cpumap)
+ uint64_t *cpumap, int cpusize)
{
DECLARE_DOMCTL;
int ret = -1;
- uint8_t local[sizeof (cpumap)];
-
+ uint8_t *local = malloc(cpusize);
+
+ if(local == NULL)
+ {
+ PERROR("Could not alloc memory for Xen hypercall");
+ goto out;
+ }
domctl.cmd = XEN_DOMCTL_setvcpuaffinity;
domctl.domain = (domid_t)domid;
domctl.u.vcpuaffinity.vcpu = vcpu;
- bitmap_64_to_byte(local, &cpumap, sizeof(cpumap) * 8);
+ bitmap_64_to_byte(local, cpumap, cpusize * 8);
set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
- domctl.u.vcpuaffinity.cpumap.nr_cpus = sizeof(cpumap) * 8;
+ domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
- if ( lock_pages(local, sizeof(local)) != 0 )
+ if ( lock_pages(local, cpusize) != 0 )
{
PERROR("Could not lock memory for Xen hypercall");
goto out;
@@ -122,9 +127,10 @@ int xc_vcpu_setaffinity(int xc_handle,
ret = do_domctl(xc_handle, &domctl);
- unlock_pages(local, sizeof(local));
+ unlock_pages(local, cpusize);
out:
+ free(local);
return ret;
}
@@ -132,18 +138,26 @@ int xc_vcpu_getaffinity(int xc_handle,
int xc_vcpu_getaffinity(int xc_handle,
uint32_t domid,
int vcpu,
- uint64_t *cpumap)
+ uint64_t *cpumap,
+ int cpusize)
{
DECLARE_DOMCTL;
int ret = -1;
- uint8_t local[sizeof (cpumap)];
+ uint8_t * local = malloc(cpusize);
+
+ if(local == NULL)
+ {
+ PERROR("Could not alloc memory for Xen hypercall");
+ goto out;
+ }
domctl.cmd = XEN_DOMCTL_getvcpuaffinity;
domctl.domain = (domid_t)domid;
domctl.u.vcpuaffinity.vcpu = vcpu;
+
set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
- domctl.u.vcpuaffinity.cpumap.nr_cpus = sizeof(cpumap) * 8;
+ domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
if ( lock_pages(local, sizeof(local)) != 0 )
{
@@ -154,8 +168,9 @@ int xc_vcpu_getaffinity(int xc_handle,
ret = do_domctl(xc_handle, &domctl);
unlock_pages(local, sizeof (local));
- bitmap_byte_to_64(cpumap, local, sizeof(local) * 8);
- out:
+ bitmap_byte_to_64(cpumap, local, cpusize * 8);
+out:
+ free(local);
return ret;
}
diff -r 95f5a4ce8f24 -r b64a8d2a80ad tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Wed Mar 17 08:35:13 2010 +0000
+++ b/tools/libxc/xenctrl.h Wed Mar 17 09:17:27 2010 +0000
@@ -309,11 +309,13 @@ int xc_vcpu_setaffinity(int xc_handle,
int xc_vcpu_setaffinity(int xc_handle,
uint32_t domid,
int vcpu,
- uint64_t cpumap);
+ uint64_t *cpumap,
+ int cpusize);
int xc_vcpu_getaffinity(int xc_handle,
uint32_t domid,
int vcpu,
- uint64_t *cpumap);
+ uint64_t *cpumap,
+ int cpusize);
/**
* This function will return information about one or more domains. It is
diff -r 95f5a4ce8f24 -r b64a8d2a80ad tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c Wed Mar 17 08:35:13 2010 +0000
+++ b/tools/python/xen/lowlevel/xc/xc.c Wed Mar 17 09:17:27 2010 +0000
@@ -215,35 +215,54 @@ static PyObject *pyxc_vcpu_setaffinity(X
{
uint32_t dom;
int vcpu = 0, i;
- uint64_t cpumap = ~0ULL;
+ uint64_t *cpumap;
PyObject *cpulist = NULL;
+ int nr_cpus, size;
+ xc_physinfo_t info;
+ xc_cpu_to_node_t map[1];
+ uint64_t cpumap_size = sizeof(cpumap);
static char *kwd_list[] = { "domid", "vcpu", "cpumap", NULL };
+
if ( !PyArg_ParseTupleAndKeywords(args, kwds, "i|iO", kwd_list,
&dom, &vcpu, &cpulist) )
return NULL;
+ set_xen_guest_handle(info.cpu_to_node, map);
+ info.max_cpu_id = 1;
+ if ( xc_physinfo(self->xc_handle, &info) != 0 )
+ return pyxc_error_to_exception();
+
+ nr_cpus = info.nr_cpus;
+
+ size = (nr_cpus + cpumap_size * 8 - 1)/ (cpumap_size * 8);
+ cpumap = malloc(cpumap_size * size);
+ if(cpumap == NULL)
+ return pyxc_error_to_exception();
+
+
if ( (cpulist != NULL) && PyList_Check(cpulist) )
{
- cpumap = 0ULL;
+ for ( i = 0; i < size; i++)
+ {
+ cpumap[i] = 0ULL;
+ }
for ( i = 0; i < PyList_Size(cpulist); i++ )
{
long cpu = PyInt_AsLong(PyList_GetItem(cpulist, i));
- if ( cpu >= 64 )
- {
- errno = EINVAL;
- PyErr_SetFromErrno(xc_error_obj);
- return NULL;
- }
- cpumap |= (uint64_t)1 << cpu;
+ *(cpumap + cpu / (cpumap_size * 8)) |= (uint64_t)1 << (cpu %
(cpumap_size * 8));
}
}
- if ( xc_vcpu_setaffinity(self->xc_handle, dom, vcpu, cpumap) != 0 )
- return pyxc_error_to_exception();
-
- Py_INCREF(zero);
+ if ( xc_vcpu_setaffinity(self->xc_handle, dom, vcpu, cpumap, size *
cpumap_size) != 0 )
+ {
+ free(cpumap);
+ return pyxc_error_to_exception();
+ }
+
+ Py_INCREF(zero);
+ free(cpumap);
return zero;
}
@@ -362,7 +381,11 @@ static PyObject *pyxc_vcpu_getinfo(XcObj
uint32_t dom, vcpu = 0;
xc_vcpuinfo_t info;
int rc, i;
- uint64_t cpumap;
+ uint64_t *cpumap;
+ int nr_cpus, size;
+ xc_physinfo_t pinfo = { 0 };
+ xc_cpu_to_node_t map[1];
+ uint64_t cpumap_size = sizeof(cpumap);
static char *kwd_list[] = { "domid", "vcpu", NULL };
@@ -370,12 +393,25 @@ static PyObject *pyxc_vcpu_getinfo(XcObj
&dom, &vcpu) )
return NULL;
+ set_xen_guest_handle(pinfo.cpu_to_node, map);
+ pinfo.max_cpu_id = 1;
+ if ( xc_physinfo(self->xc_handle, &pinfo) != 0 )
+ return pyxc_error_to_exception();
+ nr_cpus = pinfo.nr_cpus;
rc = xc_vcpu_getinfo(self->xc_handle, dom, vcpu, &info);
if ( rc < 0 )
return pyxc_error_to_exception();
- rc = xc_vcpu_getaffinity(self->xc_handle, dom, vcpu, &cpumap);
+ size = (nr_cpus + cpumap_size * 8 - 1)/ (cpumap_size * 8);
+
+ if((cpumap = malloc(cpumap_size * size)) == NULL)
+ return pyxc_error_to_exception();
+
+ rc = xc_vcpu_getaffinity(self->xc_handle, dom, vcpu, cpumap, cpumap_size *
size);
if ( rc < 0 )
- return pyxc_error_to_exception();
+ {
+ free(cpumap);
+ return pyxc_error_to_exception();
+ }
info_dict = Py_BuildValue("{s:i,s:i,s:i,s:L,s:i}",
"online", info.online,
@@ -385,17 +421,18 @@ static PyObject *pyxc_vcpu_getinfo(XcObj
"cpu", info.cpu);
cpulist = PyList_New(0);
- for ( i = 0; cpumap != 0; i++ )
+ for ( i = 0; i < size * cpumap_size * 8; i++ )
{
- if ( cpumap & 1 ) {
+ if (*(cpumap + i / (cpumap_size * 8)) & 1 ) {
PyObject *pyint = PyInt_FromLong(i);
PyList_Append(cpulist, pyint);
Py_DECREF(pyint);
}
- cpumap >>= 1;
+ *(cpumap + i / (cpumap_size * 8)) >>= 1;
}
PyDict_SetItemString(info_dict, "cpumap", cpulist);
Py_DECREF(cpulist);
+ free(cpumap);
return info_dict;
}
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