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MFC r275140: Increase default and maximum callchain depths

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Bump the default from 16 to 32, to accommodate kernel flamegraphs.
Bump the maximum from 32 to 128, to accommodate deep user stacks.

Sponsored by:	The FreeBSD Foundation
This commit is contained in:
emaste 2015-02-19 02:56:34 +00:00
parent c0ca6257a6
commit 7f01a931aa
1 changed files with 2 additions and 2 deletions
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4
sys/sys/pmc.h
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@ -349,7 +349,7 @@ enum pmc_ops {
#define PMC_F_NEEDS_LOGFILE 0x00020000 /*needs log file */
#define PMC_F_ATTACH_DONE 0x00040000 /*attached at least once */
#define PMC_CALLCHAIN_DEPTH_MAX 32
#define PMC_CALLCHAIN_DEPTH_MAX 128
#define PMC_CC_F_USERSPACE 0x01 /*userspace callchain*/
@ -605,7 +605,7 @@ struct pmc_op_getdyneventinfo {
#define PMC_LOG_BUFFER_SIZE 4
#define PMC_NLOGBUFFERS 1024
#define PMC_NSAMPLES 1024
#define PMC_CALLCHAIN_DEPTH 16
#define PMC_CALLCHAIN_DEPTH 32
#define PMC_SYSCTL_NAME_PREFIX "kern." PMC_MODULE_NAME "."