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| author | Stewart Smith <stewart@linux.ibm.com> | 2018-11-19 11:44:42 +1100 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.ibm.com> | 2018-11-19 16:56:27 +1100 |
| commit | a41470c9492039947fb6e5ed898017f7deb7bece (patch) | |
| tree | 342b5404f1101900e0999fd358ae136d05a3ae15 | |
| parent | 184d7e4aca1accf1f311ea9645761d8056406b28 (diff) | |
| download | skiboot-a41470c9492039947fb6e5ed898017f7deb7bece.zip skiboot-a41470c9492039947fb6e5ed898017f7deb7bece.tar.gz skiboot-a41470c9492039947fb6e5ed898017f7deb7bece.tar.bz2 | |
ipmi: Reduce ipmi_queue_msg_sync() polling loop time to 10ms
[ Upstream commit 28bf1faf44cd6bffcf3df0c00578b279f3faeab1 ]
On a plain boot, this reduces the time spent in OPAL by ~170ms on
p9dsu. This is due to hiomap (currently) using synchronous IPMI
messages.
It will also *significantly* reduce latency on runtime flash
operations, as we'll spend typically 10-20ms in OPAL rather than
100-200ms. It's not an ideal solution to that, but it's a quick
and obvious win for jitter.
Cc: stable
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
| -rw-r--r-- | core/ipmi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/core/ipmi.c b/core/ipmi.c index 6fdb9a7..44623a7 100644 --- a/core/ipmi.c +++ b/core/ipmi.c @@ -179,7 +179,7 @@ void ipmi_queue_msg_sync(struct ipmi_msg *msg) unlock(&sync_lock); while (sync_msg == msg) - time_wait_ms(100); + time_wait_ms(10); } static void ipmi_read_event_complete(struct ipmi_msg *msg) |