> -----Original Message-----
> From: ath10k <ath10k-bounces@xxxxxxxxxxxxxxxxxxx> On Behalf Of Ben
> Greear
> Sent: Friday, April 26, 2019 7:27 PM
> To: Michał Kazior <kazikcz@xxxxxxxxx>; Venkateswara Naralasetty
> <vnaralas@xxxxxxxxxxxxxx>
> Cc: Kan Yan <kyan@xxxxxxxxxxxx>; linux-wireless <linux-
> wireless@xxxxxxxxxxxxxxx>; ath10k@xxxxxxxxxxxxxxxxxxx
> Subject: [EXT] Re: [PATCHv2] ath10k: Add wrapper function to ath10k debug
>
> On 4/26/19 6:44 AM, Michał Kazior wrote:
> > On Fri, 26 Apr 2019 at 14:58, Venkateswara Naralasetty
> > <vnaralas@xxxxxxxxxxxxxx> wrote:
> >>
> >> ath10k_dbg() is called in ath10k_process_rx() with huge set of
> >> arguments which is causing CPU overhead even when debug_mask is not
> set.
> >> Good improvement was observed in the receive side performance when
> >> call to ath10k_dbg() is avoided in the RX path.
> > [...]
> >
> >> +/* Avoid calling __ath10k_dbg() if debug_mask is not set and tracing
> >> + * disabled.
> >> + */
> >> +#define ath10k_dbg(ar, dbg_mask, fmt, ...) \
> >> +do { \
> >> + if ((ath10k_debug_mask & dbg_mask) || \
> >> + trace_ath10k_log_dbg_enabled()) \
> >> + __ath10k_dbg(ar, dbg_mask, fmt, ##__VA_ARGS__); \ }
> >> +while (0)
> >
> > Did you consider using jump labels (see include/linux/jump_label.h)?
> > It's what tracing uses under the hood. I wonder if you could squeeze
> > out a bit more performance with that? I guess you'd need to add
> > `struct static_key ath10k_dbg_mask_keys[ATH10K_DBG_MAX]` and re-do
> > ath10k_debug_mask enum a bit.
>
> Maybe first test with debugging just compiled out to see if there is still any
> significant overhead with this new patch applied?
Since this macro ath10k_dbg defined outside of CONFIG_ATH10K_DEBUG will it make any difference even if debugging compiled out?
Thanks,
Venkatesh.
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb@xxxxxxxxxxxxxxx>
> Candela Technologies Inc http://www.candelatech.com
>
>
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