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| author | Vivek Goyal <vgoyal@redhat.com> | 2012-10-03 16:57:01 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-01-09 08:05:09 -0800 |
| commit | b226e5c411759eec29308f0ea38e918aa695dc7f (patch) | |
| tree | 6f2499ce07c59f7a180de4b21bd5fc8e8f4c09bd /block | |
| parent | 1f23f12151ab508728dd5fca12180e2fce6c6949 (diff) | |
| download | linux-b226e5c411759eec29308f0ea38e918aa695dc7f.tar.gz linux-b226e5c411759eec29308f0ea38e918aa695dc7f.tar.bz2 linux-b226e5c411759eec29308f0ea38e918aa695dc7f.zip | |
cfq-iosched: Print sync-noidle information in blktrace messages
Currently we attach a character "S" or "A" to the cfqq<pid>, to represent
whether queues is sync or async. Add one more character "N" to represent
whether it is sync-noidle queue or sync queue. So now three different
type of queues will look as follows.
cfq1234S --> sync queus
cfq1234SN --> sync noidle queue
cfq1234A --> Async queue
Previously S/A classification was being printed only if group scheduling
was enabled. This patch also makes sure that this classification is
displayed even if group idling is disabled.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/cfq-iosched.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 5ad4cae1beb2..bc076f45ca46 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -586,8 +586,9 @@ static inline void cfqg_put(struct cfq_group *cfqg) char __pbuf[128]; \ \ blkg_path(cfqg_to_blkg((cfqq)->cfqg), __pbuf, sizeof(__pbuf)); \ - blk_add_trace_msg((cfqd)->queue, "cfq%d%c %s " fmt, (cfqq)->pid, \ - cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \ + blk_add_trace_msg((cfqd)->queue, "cfq%d%c%c %s " fmt, (cfqq)->pid, \ + cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \ + cfqq_type((cfqq)) == SYNC_NOIDLE_WORKLOAD ? 'N' : ' ',\ __pbuf, ##args); \ } while (0) @@ -675,7 +676,10 @@ static inline void cfqg_get(struct cfq_group *cfqg) { } static inline void cfqg_put(struct cfq_group *cfqg) { } #define cfq_log_cfqq(cfqd, cfqq, fmt, args...) \ - blk_add_trace_msg((cfqd)->queue, "cfq%d " fmt, (cfqq)->pid, ##args) + blk_add_trace_msg((cfqd)->queue, "cfq%d%c%c " fmt, (cfqq)->pid, \ + cfq_cfqq_sync((cfqq)) ? 'S' : 'A', \ + cfqq_type((cfqq)) == SYNC_NOIDLE_WORKLOAD ? 'N' : ' ',\ + ##args) #define cfq_log_cfqg(cfqd, cfqg, fmt, args...) do {} while (0) static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg, |