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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0c0a400d1d
The below patch passes samples from anonymous regions to userspace instead of just dropping them. This provides the support needed for reporting anonymous-region code samples (today: basic accumulated results; later: Java and other dynamically compiled code). As this changes the format, an upgrade to the just-released 0.9 release of the userspace tools is required. This patch is based upon an earlier one by Will Cohen <wcohen@redhat.com> Signed-off-by: John Levon <levon@movementarian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/**
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* @file event_buffer.h
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author John Levon <levon@movementarian.org>
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*/
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#ifndef EVENT_BUFFER_H
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#define EVENT_BUFFER_H
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#include <linux/types.h>
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#include <asm/semaphore.h>
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int alloc_event_buffer(void);
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void free_event_buffer(void);
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/* wake up the process sleeping on the event file */
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void wake_up_buffer_waiter(void);
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/* Each escaped entry is prefixed by ESCAPE_CODE
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* then one of the following codes, then the
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* relevant data.
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*/
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#define ESCAPE_CODE ~0UL
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#define CTX_SWITCH_CODE 1
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#define CPU_SWITCH_CODE 2
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#define COOKIE_SWITCH_CODE 3
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#define KERNEL_ENTER_SWITCH_CODE 4
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#define KERNEL_EXIT_SWITCH_CODE 5
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#define MODULE_LOADED_CODE 6
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#define CTX_TGID_CODE 7
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#define TRACE_BEGIN_CODE 8
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#define TRACE_END_CODE 9
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#define INVALID_COOKIE ~0UL
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#define NO_COOKIE 0UL
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/* add data to the event buffer */
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void add_event_entry(unsigned long data);
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extern struct file_operations event_buffer_fops;
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/* mutex between sync_cpu_buffers() and the
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* file reading code.
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*/
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extern struct semaphore buffer_sem;
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#endif /* EVENT_BUFFER_H */
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