d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Expand the latency tracking array from 1.024s to 8.192s to help track

Browse Source 
extreme outliers from dodgy drives. Adjust comments to reflect this,
and make sure that the number of latency buckets match in the two
places where it matters.
This commit is contained in:
imp 2017-08-24 22:11:10 +00:00
parent 992b97811b
commit 047fee2f8d
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/cam/cam_iosched.c
View File

@ -233,7 +233,7 @@ struct iop_stats {
uint32_t state_flags;
#define IOP_RATE_LIMITED 1u
#define LAT_BUCKETS 12 /* < 1ms < 2ms ... 512ms < 1024ms > 1024ms */
#define LAT_BUCKETS 15 /* < 1ms < 2ms ... < 2^(n-1)ms >= 2^(n-1)ms*/
uint64_t latencies[LAT_BUCKETS];
struct cam_iosched_softc *softc;
@ -1520,7 +1520,7 @@ isqrt64(uint64_t val)
return res;
}
static sbintime_t latencies[] = {
static sbintime_t latencies[LAT_BUCKETS - 1] = {
SBT_1MS << 0,
SBT_1MS << 1,
SBT_1MS << 2,
@ -1531,7 +1531,10 @@ static sbintime_t latencies[] = {
SBT_1MS << 7,
SBT_1MS << 8,
SBT_1MS << 9,
SBT_1MS << 10
SBT_1MS << 10,
SBT_1MS << 11,
SBT_1MS << 12,
SBT_1MS << 13 /* 8.192s */
};
static void