Use --block-size to specify block size (KB)
When --split is specified in cyclic mode,block table will be
generated in get_num_dumpable_cyclic.
Signed-off-by: Qiao Nuohan <qiaonuohan at cn.fujitsu.com>
Signed-off-by: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
---
makedumpfile.8 | 16 ++++++++++++++++
makedumpfile.c | 4 ++++
makedumpfile.h | 1 +
3 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/makedumpfile.8 b/makedumpfile.8
index 9cb12c0..a384213 100644
--- a/makedumpfile.8
+++ b/makedumpfile.8
@@ -386,6 +386,22 @@ size, so ordinary users don't need to specify this option.
# makedumpfile \-\-cyclic\-buffer 1024 \-d 31 \-x vmlinux /proc/vmcore dumpfile
.TP
+\fB\-\-block\-size\fR \fIblock_size\fR
+Specify the block size in kilo bytes for analysis in the cyclic mode with --split.
+In the cyclic split mode, the number of blocks is represented as:
+
+ num_of_blocks = system_memory / (\fIblock_size\fR * 1KB )
+
+The larger number of block, the faster working speed is expected, but the more memory will
+be taken. By default, \fIblock_size\fR will be set as 1GB, so ordinary users don't need to
+specify this option.
+
+.br
+.B Example:
+.br
+# makedumpfile \-\-block\-size 10240 \-d 31 \-x vmlinux \-\-split /proc/vmcore dumpfile1 dumpfile2
+
+.TP
\fB\-\-non\-cyclic\fR
Running in the non-cyclic mode, this mode uses the old filtering logic same as v1.4.4 or before.
If you feel the cyclic mode is too slow, please try this mode.
diff --git a/makedumpfile.c b/makedumpfile.c
index 3e66346..405d935 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -9571,6 +9571,7 @@ static struct option longopts[] = {
{"eppic", required_argument, NULL, OPT_EPPIC},
{"non-mmap", no_argument, NULL, OPT_NON_MMAP},
{"mem-usage", no_argument, NULL, OPT_MEM_USAGE},
+ {"block-size", required_argument, NULL, OPT_BLOCK_SIZE},
{0, 0, 0, 0}
};
@@ -9711,6 +9712,9 @@ main(int argc, char *argv[])
case OPT_CYCLIC_BUFFER:
info->bufsize_cyclic = atoi(optarg);
break;
+ case OPT_BLOCK_SIZE:
+ info->block_size = atoi(optarg);
+ break;
case '?':
MSG("Commandline parameter is invalid.\n");
MSG("Try `makedumpfile --help' for more information.\n");
diff --git a/makedumpfile.h b/makedumpfile.h
index ed4f799..56d2c79 100644
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -1883,6 +1883,7 @@ struct elf_prstatus {
#define OPT_EPPIC OPT_START+12
#define OPT_NON_MMAP OPT_START+13
#define OPT_MEM_USAGE OPT_START+14
+#define OPT_BLOCK_SIZE OPT_START+15
/*
* Function Prototype.
--
1.7.1
