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https://github.com/edk2-porting/linux-next.git
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3847ce32ae
This patch adds 2 tracepoints to get a status of a socket receive queue and related parameter. One tracepoint is added to sock_queue_rcv_skb. It records rcvbuf size and its usage. The other tracepoint is added to __sk_mem_schedule and it records limitations of memory for sockets and current usage. By using these tracepoints we're able to know detailed reason why kernel drop the packet. Signed-off-by: Satoru Moriya <satoru.moriya@hds.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM sock
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#if !defined(_TRACE_SOCK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_SOCK_H
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#include <net/sock.h>
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#include <linux/tracepoint.h>
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TRACE_EVENT(sock_rcvqueue_full,
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TP_PROTO(struct sock *sk, struct sk_buff *skb),
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TP_ARGS(sk, skb),
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TP_STRUCT__entry(
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__field(int, rmem_alloc)
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__field(unsigned int, truesize)
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__field(int, sk_rcvbuf)
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),
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TP_fast_assign(
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__entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc);
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__entry->truesize = skb->truesize;
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__entry->sk_rcvbuf = sk->sk_rcvbuf;
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),
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TP_printk("rmem_alloc=%d truesize=%u sk_rcvbuf=%d",
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__entry->rmem_alloc, __entry->truesize, __entry->sk_rcvbuf)
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);
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TRACE_EVENT(sock_exceed_buf_limit,
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TP_PROTO(struct sock *sk, struct proto *prot, long allocated),
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TP_ARGS(sk, prot, allocated),
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TP_STRUCT__entry(
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__array(char, name, 32)
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__field(long *, sysctl_mem)
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__field(long, allocated)
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__field(int, sysctl_rmem)
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__field(int, rmem_alloc)
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),
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TP_fast_assign(
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strncpy(__entry->name, prot->name, 32);
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__entry->sysctl_mem = prot->sysctl_mem;
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__entry->allocated = allocated;
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__entry->sysctl_rmem = prot->sysctl_rmem[0];
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__entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc);
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),
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TP_printk("proto:%s sysctl_mem=%ld,%ld,%ld allocated=%ld "
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"sysctl_rmem=%d rmem_alloc=%d",
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__entry->name,
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__entry->sysctl_mem[0],
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__entry->sysctl_mem[1],
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__entry->sysctl_mem[2],
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__entry->allocated,
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__entry->sysctl_rmem,
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__entry->rmem_alloc)
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);
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#endif /* _TRACE_SOCK_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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