Export statistics for softirq in /proc/softirqs and /proc/stat.
1. /proc/softirqs
Implement /proc/softirqs which shows the number of softirq
for each CPU like /proc/interrupts.
2. /proc/stat
Add the "softirq" line to /proc/stat.
This line shows the number of softirq for all cpu.
The first column is the total of all softirqs and
each subsequent column is the total for particular softirq.
Signed-off-by: Keika Kobayashi <kobayashi.kk@xxxxxxxxxxxxxx>
Reviewed-by: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>
---
fs/proc/Makefile | 1 +
fs/proc/softirqs.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/proc/stat.c | 17 +++++++++++++++
3 files changed, 75 insertions(+), 0 deletions(-)
create mode 100644 fs/proc/softirqs.c
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 63d9651..11a7b5c 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -18,6 +18,7 @@ proc-y += meminfo.o
proc-y += stat.o
proc-y += uptime.o
proc-y += version.o
+proc-y += softirqs.o
proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o
proc-$(CONFIG_NET) += proc_net.o
proc-$(CONFIG_PROC_KCORE) += kcore.o
diff --git a/fs/proc/softirqs.c b/fs/proc/softirqs.c
new file mode 100644
index 0000000..543f9d9
--- /dev/null
+++ b/fs/proc/softirqs.c
@@ -0,0 +1,57 @@
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static const char *desc_array[] = {
+ "HI",
+ "TIMER",
+ "NET_TX",
+ "NET_RX",
+ "BLOCK",
+ "TASKLET",
+ "SCHED",
+#ifdef CONFIG_HIGH_RES_TIMERS
+ "HRTIMER",
+#endif
+ "RCU"};
+