[Qemu-devel] [PATCH 2/2] Add monitor command mem-nodes

[Wanlong Gao <gaowanlong@cn.fujitsu.com>]

Add monitor command mem-nodes to show the huge mapped
memory nodes locations.

(qemu) info mem-nodes
/proc/14132/fd/13: 00002aaaaac00000-00002aaaeac00000: node0
/proc/14132/fd/13: 00002aaaeac00000-00002aab2ac00000: node1
/proc/14132/fd/14: 00002aab2ac00000-00002aab2b000000: node0
/proc/14132/fd/14: 00002aab2b000000-00002aab2b400000: node1

Refer to the proposal of Eduardo and Daniel.
http://article.gmane.org/gmane.comp.emulators.kvm.devel/93476

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
---
 monitor.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/monitor.c b/monitor.c
index eefc7f0..85c865f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -74,6 +74,10 @@
 #endif
 #include "hw/lm32/lm32_pic.h"
 
+#if defined(CONFIG_NUMA)
+#include <numaif.h>
+#endif
+
 //#define DEBUG
 //#define DEBUG_COMPLETION
 
@@ -1759,6 +1763,38 @@ static void mem_info(Monitor *mon, const QDict *qdict)
 }
 #endif
 
+#if defined(CONFIG_NUMA)
+static void mem_nodes(Monitor *mon, const QDict *qdict)
+{
+    RAMBlock *block;
+    int prevnode, node;
+    unsigned long long c, start, area;
+    int fd;
+    int pid = getpid();
+    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+        if (!(fd = block->fd))
+            continue;
+        prevnode = -1;
+        start = 0;
+        area = (unsigned long long)block->host;
+        for (c = 0; c < block->length; c += TARGET_PAGE_SIZE) {
+            if (get_mempolicy(&node, NULL, 0, c + block->host,
+                              MPOL_F_ADDR | MPOL_F_NODE) < 0)
+                continue;
+            if (node == prevnode)
+                continue;
+            if (prevnode != -1)
+                monitor_printf(mon, "/proc/%d/fd/%d: %016Lx-%016Lx: node%d\n",
+                               pid, fd, start + area, c + area, prevnode);
+            prevnode = node;
+            start = c;
+         }
+         monitor_printf(mon, "/proc/%d/fd/%d: %016Lx-%016Lx: node%d\n",
+                        pid, fd, start + area, c + area, prevnode);
+    }
+}
+#endif
+
 #if defined(TARGET_SH4)
 
 static void print_tlb(Monitor *mon, int idx, tlb_t *tlb)
@@ -2567,6 +2603,15 @@ static mon_cmd_t info_cmds[] = {
         .mhandler.cmd = mem_info,
     },
 #endif
+#if defined(CONFIG_NUMA)
+    {
+        .name       = "mem-nodes",
+        .args_type  = "",
+        .params     = "",
+        .help       = "show the huge mapped memory nodes location",
+        .mhandler.cmd = mem_nodes,
+    },
+#endif
     {
         .name       = "mtree",
         .args_type  = "",
-- 
1.8.3.rc2.10.g0c2b1cf