hello,
though --split can parallel process, it can't just produce one core.
more processes, better performance. but it also means more split cores.
people may want to just produce one core, however they still prefer parallel
processing for its better performance.
so, parallel processing by multiple threads is needed.
in the future, multiple threads can also be used in each split process to
accelerate process.
On 06/10/2015 02:06 PM, Atsushi Kumagai wrote:
Hello Zhou,
This patch set implements parallel processing by means of multiple threads.
With this patch set, it is available to use multiple threads to read
and compress pages. This parallel process will save time.
This feature only supports creating dumpfile in kdump-compressed format from
vmcore in kdump-compressed format or elf format. Currently, sadump and
xen kdump are not supported.
makedumpfile already has a parallel processing feature (--split),
it parallelizes not only page compression but also disk i/o, so
I think --split includes what you want to do by this patch.
In what case do you think this patch will be effective, what is
the advantage of this patch ?
Thanks
Atsushi Kumagai
Qiao Nuohan (11):
Add readpage_kdump_compressed_parallel
Add mappage_elf_parallel
Add readpage_elf_parallel
Add read_pfn_parallel
Add function to initial bitmap for parallel use
Add filter_data_buffer_parallel
Add write_kdump_pages_parallel to allow parallel process
Add write_kdump_pages_parallel_cyclic to allow parallel process in
cyclic_mode
Initial and free data used for parallel process
Make makedumpfile available to read and compress pages parallelly
Add usage and manual about multiple threads process
Makefile | 2 +
erase_info.c | 29 +-
erase_info.h | 2 +
makedumpfile.8 | 24 +
makedumpfile.c | 1505 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
makedumpfile.h | 79 +++
print_info.c | 16 +
7 files changed, 1652 insertions(+), 5 deletions(-)
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Thanks
Zhou Wenjian
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