diff options
Diffstat (limited to 'runtime/transport/utt.h')
| -rw-r--r-- | runtime/transport/utt.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/runtime/transport/utt.h b/runtime/transport/utt.h index b2c9fa9f..fd704009 100644 --- a/runtime/transport/utt.h +++ b/runtime/transport/utt.h @@ -15,11 +15,18 @@ struct utt_trace { atomic_t dropped; struct dentry *utt_tree_root; /* systemtap */ void *private_data; + atomic_t wakeup; + struct timer_list timer; + int is_global; }; #define UTT_TRACE_ROOT_NAME_SIZE 64 /* Largest string for a root dir identifier */ #define UTT_TRACE_NAME_SIZE 64 /* Largest string for a trace identifier */ +#ifndef UTT_TIMER_INTERVAL +#define UTT_TIMER_INTERVAL ((HZ + 99) / 100) /* Wakeup timer interval in jiffies (default 10 ms)*/ +#endif + /* * User setup structure */ @@ -39,4 +46,33 @@ extern int utt_trace_startstop(struct utt_trace *utt, int start, extern void utt_trace_cleanup(struct utt_trace *utt); extern int utt_trace_remove(struct utt_trace *utt); +#ifndef STP_OLD_TRANSPORT +extern size_t utt_switch_subbuf(struct utt_trace *utt, struct rchan_buf *buf, + size_t length); +/** + * utt_reserve - reserve slot in channel buffer + * @utt: utt channel + * @length: number of bytes to reserve + * + * Returns pointer to reserved slot, NULL if full. + * + * This function is utt_switch_subbuf version of relay_reserve. + */ +static inline void *utt_reserve(struct utt_trace *utt, size_t length) +{ + void *reserved; + struct rchan_buf *buf = utt->rchan->buf[smp_processor_id()]; + + if (unlikely(buf->offset + length > buf->chan->subbuf_size)) { + length = utt_switch_subbuf(utt, buf, length); + if (!length) + return NULL; + } + reserved = buf->data + buf->offset; + buf->offset += length; + + return reserved; +} +#endif + #endif |