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| author | Dr. David Alan Gilbert | 2018-06-13 12:26:41 +0200 |
|---|---|---|
| committer | Dr. David Alan Gilbert | 2018-06-15 15:40:56 +0200 |
| commit | ad767bed5af559ed32c6dabdcaccc3f75731e1f4 (patch) | |
| tree | e29268c63f734e0d24788e5f1356d72647ab9d24 /migration/trace-events | |
| parent | migration/postcopy: Add max-postcopy-bandwidth parameter (diff) | |
| download | qemu-ad767bed5af559ed32c6dabdcaccc3f75731e1f4.tar.gz qemu-ad767bed5af559ed32c6dabdcaccc3f75731e1f4.tar.xz qemu-ad767bed5af559ed32c6dabdcaccc3f75731e1f4.zip | |
migration: Wake rate limiting for urgent requests
Rate limiting sleeps the migration thread for a while when it runs
out of bandwidth; but sometimes we want to wake up to get on with
something more urgent (like a postcopy request). Here we use
a semaphore with a timedwait instead of a simple sleep; Incrementing
the sempahore will wake it up sooner. Anything that consumes
these urgent events must decrement the sempahore.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20180613102642.23995-3-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'migration/trace-events')
| -rw-r--r-- | migration/trace-events | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/migration/trace-events b/migration/trace-events index 4a768eaaeb..3f67758893 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -108,6 +108,8 @@ migration_return_path_end_before(void) "" migration_return_path_end_after(int rp_error) "%d" migration_thread_after_loop(void) "" migration_thread_file_err(void) "" +migration_thread_ratelimit_pre(int ms) "%d ms" +migration_thread_ratelimit_post(int urgent) "urgent: %d" migration_thread_setup_complete(void) "" open_return_path_on_source(void) "" open_return_path_on_source_continue(void) "" |