diff options
| author | Mohan Srinivasan <srmohan@google.com> | 2016-08-25 18:31:01 -0700 |
|---|---|---|
| committer | Mohan Srinivasan <srmohan@google.com> | 2016-09-06 17:43:28 +0000 |
| commit | 65733da1dd5c3643e310d371bdb2420a6f3d8e97 (patch) | |
| tree | 082e008a01cac70fef732ed08300c80cb3ac36de /include/linux/mmc | |
| parent | 19787e3f1cd696356b4ec02fa3a345dcb4aaf3dc (diff) | |
Android: MMC/UFS IO Latency Histograms.
This patch adds a new sysfs node (latency_hist) and reports
IO (svc time) latency histograms. Disabled by default, can be
enabled by echoing 0 into latency_hist, stats can be cleared
by writing 2 into latency_hist. This commit fixes the 32 bit
build breakage in the previous commit. Tested on both 32 bit
and 64 bit arm devices.
Bug: 30677035
Change-Id: I9a615a16616d80f87e75676ac4d078a5c429dcf9
Signed-off-by: Mohan Srinivasan <srmohan@google.com>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/core.h | 2 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 37967b6da03c..3349f0676acb 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -136,6 +136,8 @@ struct mmc_request { struct completion completion; void (*done)(struct mmc_request *);/* completion function */ struct mmc_host *host; + ktime_t io_start; + int lat_hist_enabled; }; struct mmc_card; diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 40025b28c1fb..e4862f7cdede 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -16,6 +16,7 @@ #include <linux/sched.h> #include <linux/device.h> #include <linux/fault-inject.h> +#include <linux/blkdev.h> #include <linux/mmc/core.h> #include <linux/mmc/card.h> @@ -379,6 +380,9 @@ struct mmc_host { } embedded_sdio_data; #endif + int latency_hist_enabled; + struct io_latency_state io_lat_s; + unsigned long private[0] ____cacheline_aligned; }; |