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authorKrishna Gudipati <kgudipat@brocade.com>2011-07-21 04:01:52 +0400
committerJames Bottomley <JBottomley@Parallels.com>2011-07-27 14:47:45 +0400
commit42a8e6e298f39518445785c53a16357267db37ef (patch)
tree11e02e5579c5eef3cb5226b881f83808f2e862ca /drivers/scsi/bfa/bfa_fcpim.c
parentf2ee76017b30c84f128dfbf716950ffc0e4d949a (diff)
downloadlinux-42a8e6e298f39518445785c53a16357267db37ef.tar.xz
[SCSI] bfa: Add support for IO profiling.
- Made changes to support IO profiling. - Added support to configure and query IO profiling info. Signed-off-by: Krishna Gudipati <kgudipat@brocade.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/bfa/bfa_fcpim.c')
-rw-r--r--drivers/scsi/bfa/bfa_fcpim.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index a4e7951c6063..7bc010dc17b1 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -437,6 +437,59 @@ bfa_fcpim_port_iostats(struct bfa_s *bfa,
return BFA_STATUS_OK;
}
+void
+bfa_ioim_profile_comp(struct bfa_ioim_s *ioim)
+{
+ struct bfa_itnim_latency_s *io_lat =
+ &(ioim->itnim->ioprofile.io_latency);
+ u32 val, idx;
+
+ val = (u32)(jiffies - ioim->start_time);
+ idx = bfa_ioim_get_index(scsi_bufflen((struct scsi_cmnd *)ioim->dio));
+ bfa_itnim_ioprofile_update(ioim->itnim, idx);
+
+ io_lat->count[idx]++;
+ io_lat->min[idx] = (io_lat->min[idx] < val) ? io_lat->min[idx] : val;
+ io_lat->max[idx] = (io_lat->max[idx] > val) ? io_lat->max[idx] : val;
+ io_lat->avg[idx] += val;
+}
+
+void
+bfa_ioim_profile_start(struct bfa_ioim_s *ioim)
+{
+ ioim->start_time = jiffies;
+}
+
+bfa_status_t
+bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time)
+{
+ struct bfa_itnim_s *itnim;
+ struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
+ struct list_head *qe, *qen;
+
+ /* accumulate IO stats from itnim */
+ list_for_each_safe(qe, qen, &fcpim->itnim_q) {
+ itnim = (struct bfa_itnim_s *) qe;
+ bfa_itnim_clear_stats(itnim);
+ }
+ fcpim->io_profile = BFA_TRUE;
+ fcpim->io_profile_start_time = time;
+ fcpim->profile_comp = bfa_ioim_profile_comp;
+ fcpim->profile_start = bfa_ioim_profile_start;
+ return BFA_STATUS_OK;
+}
+
+bfa_status_t
+bfa_fcpim_profile_off(struct bfa_s *bfa)
+{
+ struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
+ fcpim->io_profile = BFA_FALSE;
+ fcpim->io_profile_start_time = 0;
+ fcpim->profile_comp = NULL;
+ fcpim->profile_start = NULL;
+ return BFA_STATUS_OK;
+}
+
u16
bfa_fcpim_qdepth_get(struct bfa_s *bfa)
{
@@ -1401,6 +1454,26 @@ bfa_itnim_hold_io(struct bfa_itnim_s *itnim)
bfa_sm_cmp_state(itnim, bfa_itnim_sm_iocdisable));
}
+#define bfa_io_lat_clock_res_div HZ
+#define bfa_io_lat_clock_res_mul 1000
+bfa_status_t
+bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
+ struct bfa_itnim_ioprofile_s *ioprofile)
+{
+ struct bfa_fcpim_s *fcpim = BFA_FCPIM(itnim->bfa);
+ if (!fcpim->io_profile)
+ return BFA_STATUS_IOPROFILE_OFF;
+
+ itnim->ioprofile.index = BFA_IOBUCKET_MAX;
+ itnim->ioprofile.io_profile_start_time =
+ bfa_io_profile_start_time(itnim->bfa);
+ itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul;
+ itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div;
+ *ioprofile = itnim->ioprofile;
+
+ return BFA_STATUS_OK;
+}
+
void
bfa_itnim_clear_stats(struct bfa_itnim_s *itnim)
{