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Code Issues

ar8216: reduce latency by inserting scheduling points into code hogging the CPU

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Should reduce network related latency caused by accessing MIB counters

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-04-07 13:02:08 +02:00
parent eda27d7557
commit 17a955d4d7
1 changed files with 7 additions and 2 deletions
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9
target/linux/generic/files/drivers/net/phy/ar8216.c
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@ -355,6 +355,7 @@ ar8xxx_reg_wait(struct ar8xxx_priv *priv, u32 reg, u32 mask, u32 val,
return 0;
usleep_range(1000, 2000);
cond_resched();
}
return -ETIMEDOUT;
@ -426,6 +427,7 @@ ar8xxx_mib_fetch_port_stat(struct ar8xxx_priv *priv, int port, bool flush)
mib_stats[i] = 0;
else
mib_stats[i] += t;
cond_resched();
}
}
@ -565,6 +567,7 @@ ar8216_wait_bit(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
break;
udelay(10);
cond_resched();
}
pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n",
@ -730,8 +733,10 @@ ar8216_wait_atu_ready(struct ar8xxx_priv *priv, u16 r2, u16 r1)
{
int timeout = 20;
while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout)
udelay(10);
while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) {
udelay(10);
cond_resched();
}
if (!timeout)
pr_err("ar8216: timeout waiting for atu to become ready\n");