diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/Kconfig | 11 | ||||
| -rw-r--r-- | kernel/trace/Makefile | 1 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 19 | ||||
| -rw-r--r-- | kernel/trace/trace_skb_sources.c | 154 |
4 files changed, 0 insertions, 185 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 9a2f19b..019f380 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -234,17 +234,6 @@ config BOOT_TRACER You must pass in initcall_debug and ftrace=initcall to the kernel command line to enable this on bootup. -config SKB_SOURCES_TRACER - bool "Trace skb source information" - depends on NET - select GENERIC_TRACER - help - This tracer helps developers/sysadmins correlate skb allocation and - consumption. The idea being that some processes will primarily consume data - that was allocated on certain numa nodes. By being able to visualize which - nodes the data was allocated on, a sysadmin or developer can optimize the - scheduling of those processes to cut back on cross node chatter. - config TRACE_BRANCH_PROFILING bool select GENERIC_TRACER diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index ee5e5b1..844164d 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -49,7 +49,6 @@ obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o ifeq ($(CONFIG_BLOCK),y) obj-$(CONFIG_EVENT_TRACING) += blktrace.o endif -obj-$(CONFIG_SKB_SOURCES_TRACER) += trace_skb_sources.o obj-$(CONFIG_EVENT_TRACING) += trace_events.o obj-$(CONFIG_EVENT_TRACING) += trace_export.o obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 8a6281b..8b9f4f6 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -11,7 +11,6 @@ #include <trace/boot.h> #include <linux/kmemtrace.h> #include <trace/power.h> -#include <trace/events/skb.h> #include <linux/trace_seq.h> #include <linux/ftrace_event.h> @@ -41,7 +40,6 @@ enum trace_type { TRACE_KMEM_FREE, TRACE_POWER, TRACE_BLK, - TRACE_SKB_SOURCE, __TRACE_LAST_TYPE, }; @@ -173,21 +171,6 @@ struct trace_power { struct power_trace state_data; }; -struct skb_record { - pid_t pid; /* pid of the copying process */ - int anid; /* node where skb was allocated */ - int cnid; /* node to which skb was copied in userspace */ - char ifname[IFNAMSIZ]; /* Name of the receiving interface */ - int rx_queue; /* The rx queue the skb was received on */ - int ccpu; /* Cpu the application got this frame from */ - int len; /* length of the data copied */ -}; - -struct trace_skb_event { - struct trace_entry ent; - struct skb_record event_data; -}; - enum kmemtrace_type_id { KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */ KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */ @@ -340,8 +323,6 @@ extern void __ftrace_bad_type(void); TRACE_SYSCALL_ENTER); \ IF_ASSIGN(var, ent, struct syscall_trace_exit, \ TRACE_SYSCALL_EXIT); \ - IF_ASSIGN(var, ent, struct trace_skb_event, \ - TRACE_SKB_SOURCE); \ __ftrace_bad_type(); \ } while (0) diff --git a/kernel/trace/trace_skb_sources.c b/kernel/trace/trace_skb_sources.c deleted file mode 100644 index 40eb071..0000000 --- a/kernel/trace/trace_skb_sources.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * ring buffer based tracer for analyzing per-socket skb sources - * - * Neil Horman <nhorman@tuxdriver.com> - * Copyright (C) 2009 - * - * - */ - -#include <linux/init.h> -#include <linux/debugfs.h> -#include <trace/events/skb.h> -#include <linux/kallsyms.h> -#include <linux/module.h> -#include <linux/hardirq.h> -#include <linux/netdevice.h> -#include <net/sock.h> - -#include "trace.h" -#include "trace_output.h" - -EXPORT_TRACEPOINT_SYMBOL_GPL(skb_copy_datagram_iovec); - -static struct trace_array *skb_trace; -static int __read_mostly trace_skb_source_enabled; - -static void probe_skb_dequeue(const struct sk_buff *skb, int len) -{ - struct ring_buffer_event *event; - struct trace_skb_event *entry; - struct trace_array *tr = skb_trace; - struct net_device *dev; - - if (!trace_skb_source_enabled) - return; - - if (in_interrupt()) - return; - - event = trace_buffer_lock_reserve(tr, TRACE_SKB_SOURCE, - sizeof(*entry), 0, 0); - if (!event) - return; - entry = ring_buffer_event_data(event); - - entry->event_data.pid = current->pid; - entry->event_data.anid = page_to_nid(virt_to_page(skb->data)); - entry->event_data.cnid = cpu_to_node(smp_processor_id()); - entry->event_data.len = len; - entry->event_data.rx_queue = skb->queue_mapping; - entry->event_data.ccpu = smp_processor_id(); - - dev = dev_get_by_index(sock_net(skb->sk), skb->iif); - if (dev) { - memcpy(entry->event_data.ifname, dev->name, IFNAMSIZ); - dev_put(dev); - } else { - strcpy(entry->event_data.ifname, "Unknown"); - } - - trace_buffer_unlock_commit(tr, event, 0, 0); -} - -static int tracing_skb_source_register(void) -{ - int ret; - - ret = register_trace_skb_copy_datagram_iovec(probe_skb_dequeue); - if (ret) - pr_info("skb source trace: Couldn't activate dequeue tracepoint"); - - return ret; -} - -static void start_skb_source_trace(struct trace_array *tr) -{ - trace_skb_source_enabled = 1; -} - -static void stop_skb_source_trace(struct trace_array *tr) -{ - trace_skb_source_enabled = 0; -} - -static void skb_source_trace_reset(struct trace_array *tr) -{ - trace_skb_source_enabled = 0; - unregister_trace_skb_copy_datagram_iovec(probe_skb_dequeue); -} - - -static int skb_source_trace_init(struct trace_array *tr) -{ - int cpu; - skb_trace = tr; - - trace_skb_source_enabled = 1; - tracing_skb_source_register(); - - for_each_cpu(cpu, cpu_possible_mask) - tracing_reset(tr, cpu); - return 0; -} - -static enum print_line_t skb_source_print_line(struct trace_iterator *iter) -{ - int ret = 0; - struct trace_entry *entry = iter->ent; - struct trace_skb_event *event; - struct skb_record *record; - struct trace_seq *s = &iter->seq; - - trace_assign_type(event, entry); - record = &event->event_data; - if (entry->type != TRACE_SKB_SOURCE) - return TRACE_TYPE_UNHANDLED; - - ret = trace_seq_printf(s, " %d %d %d %s %d %d %d\n", - record->pid, - record->anid, - record->cnid, - record->ifname, - record->rx_queue, - record->ccpu, - record->len); - - if (!ret) - return TRACE_TYPE_PARTIAL_LINE; - - return TRACE_TYPE_HANDLED; -} - -static void skb_source_print_header(struct seq_file *s) -{ - seq_puts(s, "# PID ANID CNID IFC RXQ CCPU LEN\n"); - seq_puts(s, "# | | | | | | |\n"); -} - -static struct tracer skb_source_tracer __read_mostly = -{ - .name = "skb_sources", - .init = skb_source_trace_init, - .start = start_skb_source_trace, - .stop = stop_skb_source_trace, - .reset = skb_source_trace_reset, - .print_line = skb_source_print_line, - .print_header = skb_source_print_header, -}; - -static int init_skb_source_trace(void) -{ - return register_tracer(&skb_source_tracer); -} -device_initcall(init_skb_source_trace); |
