diff options
| author | Krishna Gudipati <kgudipat@brocade.com> | 2011-07-21 04:01:52 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-07-27 14:47:45 +0400 |
| commit | 42a8e6e298f39518445785c53a16357267db37ef (patch) | |
| tree | 11e02e5579c5eef3cb5226b881f83808f2e862ca /drivers/scsi/bfa/bfa_fcpim.c | |
| parent | f2ee76017b30c84f128dfbf716950ffc0e4d949a (diff) | |
| download | linux-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.c | 73 |
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) { |