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[Qemu-devel] [PATCH v5 13/45] ram_debug_dump_bitmap: Dump a migration bi
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [PATCH v5 13/45] ram_debug_dump_bitmap: Dump a migration bitmap as text |
Date: |
Wed, 25 Feb 2015 16:51:36 +0000 |
From: "Dr. David Alan Gilbert" <address@hidden>
Misses out lines that are all the expected value so the output
can be quite compact depending on the circumstance.
Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
arch_init.c | 39 +++++++++++++++++++++++++++++++++++++++
include/migration/migration.h | 1 +
2 files changed, 40 insertions(+)
diff --git a/arch_init.c b/arch_init.c
index 91645cc..fe0df0d 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -776,6 +776,45 @@ static void reset_ram_globals(void)
#define MAX_WAIT 50 /* ms, half buffered_file limit */
+/*
+ * 'expected' is the value you expect the bitmap mostly to be full
+ * of and it won't bother printing lines that are all this value
+ * if 'todump' is null the migration bitmap is dumped.
+ */
+void ram_debug_dump_bitmap(unsigned long *todump, bool expected)
+{
+ int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
+
+ int64_t cur;
+ int64_t linelen = 128;
+ char linebuf[129];
+
+ if (!todump) {
+ todump = migration_bitmap;
+ }
+
+ for (cur = 0; cur < ram_pages; cur += linelen) {
+ int64_t curb;
+ bool found = false;
+ /*
+ * Last line; catch the case where the line length
+ * is longer than remaining ram
+ */
+ if (cur+linelen > ram_pages) {
+ linelen = ram_pages - cur;
+ }
+ for (curb = 0; curb < linelen; curb++) {
+ bool thisbit = test_bit(cur+curb, todump);
+ linebuf[curb] = thisbit ? '1' : '.';
+ found = found || (thisbit != expected);
+ }
+ if (found) {
+ linebuf[curb] = '\0';
+ fprintf(stderr, "0x%08" PRIx64 " : %s\n", cur, linebuf);
+ }
+ }
+}
+
static int ram_save_setup(QEMUFile *f, void *opaque)
{
RAMBlock *block;
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 5242ead..3776e86 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -156,6 +156,7 @@ uint64_t xbzrle_mig_pages_cache_miss(void);
double xbzrle_mig_cache_miss_rate(void);
void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
+void ram_debug_dump_bitmap(unsigned long *todump, bool expected);
/**
* @migrate_add_blocker - prevent migration from proceeding
--
2.1.0
- [Qemu-devel] [PATCH v5 01/45] Start documenting how postcopy works., (continued)
- [Qemu-devel] [PATCH v5 01/45] Start documenting how postcopy works., Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 03/45] qemu_ram_foreach_block: pass up error value, and down the ramblock name, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 05/45] Create MigrationIncomingState, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 02/45] Split header writing out of qemu_save_state_begin, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 04/45] Add qemu_get_counted_string to read a string prefixed by a count byte, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 06/45] Provide runtime Target page information, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 09/45] Migration commands, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 07/45] Return path: Open a return path on QEMUFile for sockets, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 10/45] Return path: Control commands, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 08/45] Return path: socket_writev_buffer: Block even on non-blocking fd's, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 13/45] ram_debug_dump_bitmap: Dump a migration bitmap as text,
Dr. David Alan Gilbert (git) <=
- [Qemu-devel] [PATCH v5 11/45] Return path: Send responses from destination to source, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 12/45] Return path: Source handling of return path, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 14/45] Move loadvm_handlers into MigrationIncomingState, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 15/45] Rework loadvm path for subloops, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 19/45] migrate_init: Call from savevm, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 18/45] MIG_CMD_PACKAGED: Send a packaged chunk of migration stream, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 16/45] Add migration-capability boolean for postcopy-ram., Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 17/45] Add wrappers and handlers for sending/receiving the postcopy-ram migration messages., Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 21/45] Add Linux userfaultfd header, Dr. David Alan Gilbert (git), 2015/02/25
- [Qemu-devel] [PATCH v5 20/45] Modify savevm handlers for postcopy, Dr. David Alan Gilbert (git), 2015/02/25