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dummynet: Move timekeeping information into dn_cfg

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Just like with the packet counters move the timekeeping information into
dn_cfg. This reduces the global name space use for dummynet and will
make subsequent work to add vnet support and re-use in pf easier.

Reviewed by:	donner
MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Different Revision:	https://reviews.freebsd.org/D29246

(cherry picked from commit 320bed3c00)
This commit is contained in:
Kristof Provost 2021-03-09 16:44:26 +01:00
parent bcfb4750b8
commit da7865ad1f
2 changed files with 26 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
sys/netpfil/ipfw/ip_dn_io.c
View file

@ -80,14 +80,6 @@ __FBSDID("$FreeBSD$");
struct dn_parms dn_cfg;
//VNET_DEFINE(struct dn_parms, _base_dn_cfg);
static long tick_last; /* Last tick duration (usec). */
static long tick_delta; /* Last vs standard tick diff (usec). */
static long tick_delta_sum; /* Accumulated tick difference (usec).*/
static long tick_adjustment; /* Tick adjustments done. */
static long tick_lost; /* Lost(coalesced) ticks number. */
/* Adjusted vs non-adjusted curr_time difference (ticks). */
static long tick_diff;
/*
* We use a heap to store entities for which we have pending timer events.
* The heap is checked at every tick and all entities with expired events
@ -192,16 +184,16 @@ SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, red_max_pkt_size,
/* time adjustment */
SYSCTL_LONG(_net_inet_ip_dummynet, OID_AUTO, tick_delta,
CTLFLAG_RD, &tick_delta, 0, "Last vs standard tick difference (usec).");
CTLFLAG_RD, DC(tick_delta), 0, "Last vs standard tick difference (usec).");
SYSCTL_LONG(_net_inet_ip_dummynet, OID_AUTO, tick_delta_sum,
CTLFLAG_RD, &tick_delta_sum, 0, "Accumulated tick difference (usec).");
CTLFLAG_RD, DC(tick_delta_sum), 0, "Accumulated tick difference (usec).");
SYSCTL_LONG(_net_inet_ip_dummynet, OID_AUTO, tick_adjustment,
CTLFLAG_RD, &tick_adjustment, 0, "Tick adjustments done.");
CTLFLAG_RD, DC(tick_adjustment), 0, "Tick adjustments done.");
SYSCTL_LONG(_net_inet_ip_dummynet, OID_AUTO, tick_diff,
CTLFLAG_RD, &tick_diff, 0,
CTLFLAG_RD, DC(tick_diff), 0,
"Adjusted vs non-adjusted curr_time difference (ticks).");
SYSCTL_LONG(_net_inet_ip_dummynet, OID_AUTO, tick_lost,
CTLFLAG_RD, &tick_lost, 0,
CTLFLAG_RD, DC(tick_lost), 0,
"Number of ticks coalesced by dummynet taskqueue.");
/* Drain parameters */
@ -665,16 +657,16 @@ dummynet_task(void *context, int pending)
DN_BH_WLOCK();
/* Update number of lost(coalesced) ticks. */
tick_lost += pending - 1;
dn_cfg.tick_lost += pending - 1;
getmicrouptime(&t);
/* Last tick duration (usec). */
tick_last = (t.tv_sec - dn_cfg.prev_t.tv_sec) * 1000000 +
dn_cfg.tick_last = (t.tv_sec - dn_cfg.prev_t.tv_sec) * 1000000 +
(t.tv_usec - dn_cfg.prev_t.tv_usec);
/* Last tick vs standard tick difference (usec). */
tick_delta = (tick_last * hz - 1000000) / hz;
dn_cfg.tick_delta = (dn_cfg.tick_last * hz - 1000000) / hz;
/* Accumulated tick difference (usec). */
tick_delta_sum += tick_delta;
dn_cfg.tick_delta_sum += dn_cfg.tick_delta;
dn_cfg.prev_t = t;
@ -686,18 +678,18 @@ dummynet_task(void *context, int pending)
* adjustment.
*/
dn_cfg.curr_time++;
if (tick_delta_sum - tick >= 0) {
int diff = tick_delta_sum / tick;
if (dn_cfg.tick_delta_sum - tick >= 0) {
int diff = dn_cfg.tick_delta_sum / tick;
dn_cfg.curr_time += diff;
tick_diff += diff;
tick_delta_sum %= tick;
tick_adjustment++;
} else if (tick_delta_sum + tick <= 0) {
dn_cfg.tick_diff += diff;
dn_cfg.tick_delta_sum %= tick;
dn_cfg.tick_adjustment++;
} else if (dn_cfg.tick_delta_sum + tick <= 0) {
dn_cfg.curr_time--;
tick_diff--;
tick_delta_sum += tick;
tick_adjustment++;
dn_cfg.tick_diff--;
dn_cfg.tick_delta_sum += tick;
dn_cfg.tick_adjustment++;
}
/* serve pending events, accumulate in q */

8
sys/netpfil/ipfw/ip_dn_private.h
View file

@ -125,6 +125,14 @@ struct dn_parms {
struct timeval prev_t; /* last time dummynet_tick ran */
struct dn_heap evheap; /* scheduled events */
long tick_last; /* Last tick duration (usec). */
long tick_delta; /* Last vs standard tick diff (usec). */
long tick_delta_sum; /* Accumulated tick difference (usec).*/
long tick_adjustment; /* Tick adjustments done. */
long tick_lost; /* Lost(coalesced) ticks number. */
/* Adjusted vs non-adjusted curr_time difference (ticks). */
long tick_diff;
/* counters of objects -- used for reporting space */
int schk_count;
int si_count;