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Increase response queue size to avoid starvation, add a counter

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to track it when it does occur.
This commit is contained in:
Navdeep Parhar 2010-04-02 17:50:52 +00:00
parent a1a8ef9125
commit 489ca05be7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=206109
3 changed files with 27 additions and 15 deletions
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3
sys/dev/cxgb/cxgb_adapter.h
View File

@ -139,7 +139,7 @@ enum {
#define FL_Q_SIZE 4096
#define JUMBO_Q_SIZE 1024
#define RSPQ_Q_SIZE 1024
#define RSPQ_Q_SIZE 2048
#define TX_ETH_Q_SIZE 1024
#define TX_OFLD_Q_SIZE 1024
#define TX_CTRL_Q_SIZE 256
@ -179,6 +179,7 @@ struct sge_rspq {
uint32_t offload_bundles;
uint32_t pure_rsps;
uint32_t unhandled_irqs;
uint32_t starved;
bus_addr_t phys_addr;
bus_dma_tag_t desc_tag;

36
sys/dev/cxgb/cxgb_main.c
View File

@ -2398,25 +2398,33 @@ cxgb_tick_handler(void *arg, int count)
if (p->rev == T3_REV_B2 && p->nports < 4 && sc->open_device_map)
check_t3b2_mac(sc);
cause = t3_read_reg(sc, A_SG_INT_CAUSE);
reset = 0;
if (cause & F_FLEMPTY) {
cause = t3_read_reg(sc, A_SG_INT_CAUSE) & (F_RSPQSTARVE | F_FLEMPTY);
if (cause) {
struct sge_qset *qs = &sc->sge.qs[0];
uint32_t mask, v;
i = 0;
reset |= F_FLEMPTY;
v = t3_read_reg(sc, A_SG_RSPQ_FL_STATUS) & ~0xff00;
cause = (t3_read_reg(sc, A_SG_RSPQ_FL_STATUS) >>
S_FL0EMPTY) & 0xffff;
while (cause) {
qs->fl[i].empty += (cause & 1);
if (i)
qs++;
i ^= 1;
cause >>= 1;
mask = 1;
for (i = 0; i < SGE_QSETS; i++) {
if (v & mask)
qs[i].rspq.starved++;
mask <<= 1;
}
mask <<= SGE_QSETS; /* skip RSPQXDISABLED */
for (i = 0; i < SGE_QSETS * 2; i++) {
if (v & mask) {
qs[i / 2].fl[i % 2].empty++;
}
mask <<= 1;
}
/* clear */
t3_write_reg(sc, A_SG_RSPQ_FL_STATUS, v);
t3_write_reg(sc, A_SG_INT_CAUSE, cause);
}
t3_write_reg(sc, A_SG_INT_CAUSE, reset);
for (i = 0; i < sc->params.nports; i++) {
struct port_info *pi = &sc->port[i];

3
sys/dev/cxgb/cxgb_sge.c
View File

@ -3586,6 +3586,9 @@ t3_add_configured_sysctls(adapter_t *sc)
SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "credits",
CTLFLAG_RD, &qs->rspq.credits,
0, "#credits");
SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "starved",
CTLFLAG_RD, &qs->rspq.starved,
0, "#times starved");
SYSCTL_ADD_XLONG(ctx, rspqpoidlist, OID_AUTO, "phys_addr",
CTLFLAG_RD, &qs->rspq.phys_addr,
"physical_address_of the queue");