Re: [PATCH v4 5/7] powerpc/powernv: add event attribute and group to nest pmu
On Thursday 09 July 2015 04:13 AM, Sukadev Bhattiprolu wrote: Madhavan Srinivasan [ma...@linux.vnet.ibm.com] wrote: | Add code to create event/format attributes and attribute groups for | each nest pmu. | | Cc: Michael Ellerman m...@ellerman.id.au | Cc: Benjamin Herrenschmidt b...@kernel.crashing.org | Cc: Paul Mackerras pau...@samba.org | Cc: Anton Blanchard an...@samba.org | Cc: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com | Cc: Anshuman Khandual khand...@linux.vnet.ibm.com | Cc: Stephane Eranian eran...@google.com | Signed-off-by: Madhavan Srinivasan ma...@linux.vnet.ibm.com | --- | arch/powerpc/perf/nest-pmu.c | 57 | 1 file changed, 57 insertions(+) | | diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c | index 6116ff3..20ed9f8 100644 | --- a/arch/powerpc/perf/nest-pmu.c | +++ b/arch/powerpc/perf/nest-pmu.c | @@ -13,6 +13,17 @@ | static struct perchip_nest_info p8_nest_perchip_info[P8_NEST_MAX_CHIPS]; | static struct nest_pmu *per_nest_pmu_arr[P8_NEST_MAX_PMUS]; | | +PMU_FORMAT_ATTR(event, config:0-20); | +struct attribute *p8_nest_format_attrs[] = { name collision unlikely, but could this be static struct? | + format_attr_event.attr, | + NULL, | +}; | + | +struct attribute_group p8_nest_format_group = { static struct? Sure will check it. | + .name = format, | + .attrs = p8_nest_format_attrs, | +}; | + | static int nest_event_info(struct property *pp, char *start, | struct nest_ima_events *p8_events, int flg, u32 val) | { | @@ -45,6 +56,48 @@ static int nest_event_info(struct property *pp, char *start, | return 0; | } | | +/* | + * Populate event name and string in attribute | + */ | +struct attribute *dev_str_attr(const char *name, const char *str) static function? Sure. Will check it. | +{ | + struct perf_pmu_events_attr *attr; | + | + attr = kzalloc(sizeof(*attr), GFP_KERNEL); | + We recently needed following in 24x7 counters to keep lockdep happy: Yeah, i saw your patch and wanted to add it, but missed it. My bad Will add it in the next version. sysfs_attr_init(attr-attr.attr); | + attr-event_str = str; | + attr-attr.attr.name = name; | + attr-attr.attr.mode = 0444; | + attr-attr.show = perf_event_sysfs_show; | + | + return attr-attr.attr; | +} | + | +int update_events_in_group( static function? nit: do we need a new line before the first parameter? some functions in the file don't add the new line. Checkpatch complained abt 80 character limit, hence did a split. | + struct nest_ima_events *p8_events, int nevents, struct nest_pmu *pmu) s/idx/nevents/? Weird, I dont see nevents in the patch I sent? it is idx. Dont know where it came from :) | +{ | + struct attribute_group *attr_group; | + struct attribute **attrs; | + int i; | + | + /* Allocate memory for event attribute group */ | + attr_group = kzalloc(((sizeof(struct attribute *) * (idx + 1)) + | + sizeof(*attr_group)), GFP_KERNEL); | + if (!attr_group) | + return -ENOMEM; | + | + attrs = (struct attribute **)(attr_group + 1); Can you add a comment on the +1? Sure, will do. | + attr_group-name = events; | + attr_group-attrs = attrs; | + | + for (i = 0; i idx; i++, p8_events++) | + attrs[i] = dev_str_attr((char *)p8_events-ev_name, | + (char *)p8_events-ev_value); | + | + pmu-attr_groups[0] = attr_group; The -attr_groups[0] is initialized here, after the -attr_groups[1] and attr_groups[2] are initialized in caller. Since, -attr_groups[1] and -attr_groups[2] are set to global (loop-invariant) values, can we initialize all the attribute-groups here? May need to rename function. I dont get it, reinitialize all the three here in this function? | + return 0; | +} | + | static int nest_pmu_create(struct device_node *dev, int pmu_index) | { | struct nest_ima_events **p8_events_arr, *p8_events; | @@ -91,6 +144,7 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) | /* Save the name to register it later */ | sprintf(buf, Nest_%s, (char *)pp-value); | pmu_ptr-pmu.name = (char *)buf; | + pmu_ptr-attr_groups[1] = p8_nest_format_group; | continue; | } | | @@ -122,6 +176,9 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) | idx++; | } | | + update_events_in_group( nit: need newline before first param? once again, checkpatch warning of 80 character. | + (struct nest_ima_events *)p8_events_arr, idx, pmu_ptr); | + | return 0; | } | | -- | 1.9.1 ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org
[PATCH v4 5/7] powerpc/powernv: add event attribute and group to nest pmu
Add code to create event/format attributes and attribute groups for each nest pmu. Cc: Michael Ellerman m...@ellerman.id.au Cc: Benjamin Herrenschmidt b...@kernel.crashing.org Cc: Paul Mackerras pau...@samba.org Cc: Anton Blanchard an...@samba.org Cc: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com Cc: Anshuman Khandual khand...@linux.vnet.ibm.com Cc: Stephane Eranian eran...@google.com Signed-off-by: Madhavan Srinivasan ma...@linux.vnet.ibm.com --- arch/powerpc/perf/nest-pmu.c | 57 1 file changed, 57 insertions(+) diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c index 6116ff3..20ed9f8 100644 --- a/arch/powerpc/perf/nest-pmu.c +++ b/arch/powerpc/perf/nest-pmu.c @@ -13,6 +13,17 @@ static struct perchip_nest_info p8_nest_perchip_info[P8_NEST_MAX_CHIPS]; static struct nest_pmu *per_nest_pmu_arr[P8_NEST_MAX_PMUS]; +PMU_FORMAT_ATTR(event, config:0-20); +struct attribute *p8_nest_format_attrs[] = { + format_attr_event.attr, + NULL, +}; + +struct attribute_group p8_nest_format_group = { + .name = format, + .attrs = p8_nest_format_attrs, +}; + static int nest_event_info(struct property *pp, char *start, struct nest_ima_events *p8_events, int flg, u32 val) { @@ -45,6 +56,48 @@ static int nest_event_info(struct property *pp, char *start, return 0; } +/* + * Populate event name and string in attribute + */ +struct attribute *dev_str_attr(const char *name, const char *str) +{ + struct perf_pmu_events_attr *attr; + + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + + attr-event_str = str; + attr-attr.attr.name = name; + attr-attr.attr.mode = 0444; + attr-attr.show = perf_event_sysfs_show; + + return attr-attr.attr; +} + +int update_events_in_group( + struct nest_ima_events *p8_events, int idx, struct nest_pmu *pmu) +{ + struct attribute_group *attr_group; + struct attribute **attrs; + int i; + + /* Allocate memory for event attribute group */ + attr_group = kzalloc(((sizeof(struct attribute *) * (idx + 1)) + + sizeof(*attr_group)), GFP_KERNEL); + if (!attr_group) + return -ENOMEM; + + attrs = (struct attribute **)(attr_group + 1); + attr_group-name = events; + attr_group-attrs = attrs; + + for (i = 0; i idx; i++, p8_events++) + attrs[i] = dev_str_attr((char *)p8_events-ev_name, + (char *)p8_events-ev_value); + + pmu-attr_groups[0] = attr_group; + return 0; +} + static int nest_pmu_create(struct device_node *dev, int pmu_index) { struct nest_ima_events **p8_events_arr, *p8_events; @@ -91,6 +144,7 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) /* Save the name to register it later */ sprintf(buf, Nest_%s, (char *)pp-value); pmu_ptr-pmu.name = (char *)buf; + pmu_ptr-attr_groups[1] = p8_nest_format_group; continue; } @@ -122,6 +176,9 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) idx++; } + update_events_in_group( + (struct nest_ima_events *)p8_events_arr, idx, pmu_ptr); + return 0; } -- 1.9.1 ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH v4 5/7] powerpc/powernv: add event attribute and group to nest pmu
Madhavan Srinivasan [ma...@linux.vnet.ibm.com] wrote: | Add code to create event/format attributes and attribute groups for | each nest pmu. | | Cc: Michael Ellerman m...@ellerman.id.au | Cc: Benjamin Herrenschmidt b...@kernel.crashing.org | Cc: Paul Mackerras pau...@samba.org | Cc: Anton Blanchard an...@samba.org | Cc: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com | Cc: Anshuman Khandual khand...@linux.vnet.ibm.com | Cc: Stephane Eranian eran...@google.com | Signed-off-by: Madhavan Srinivasan ma...@linux.vnet.ibm.com | --- | arch/powerpc/perf/nest-pmu.c | 57 | 1 file changed, 57 insertions(+) | | diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c | index 6116ff3..20ed9f8 100644 | --- a/arch/powerpc/perf/nest-pmu.c | +++ b/arch/powerpc/perf/nest-pmu.c | @@ -13,6 +13,17 @@ | static struct perchip_nest_info p8_nest_perchip_info[P8_NEST_MAX_CHIPS]; | static struct nest_pmu *per_nest_pmu_arr[P8_NEST_MAX_PMUS]; | | +PMU_FORMAT_ATTR(event, config:0-20); | +struct attribute *p8_nest_format_attrs[] = { name collision unlikely, but could this be static struct? | + format_attr_event.attr, | + NULL, | +}; | + | +struct attribute_group p8_nest_format_group = { static struct? | + .name = format, | + .attrs = p8_nest_format_attrs, | +}; | + | static int nest_event_info(struct property *pp, char *start, | struct nest_ima_events *p8_events, int flg, u32 val) | { | @@ -45,6 +56,48 @@ static int nest_event_info(struct property *pp, char *start, | return 0; | } | | +/* | + * Populate event name and string in attribute | + */ | +struct attribute *dev_str_attr(const char *name, const char *str) static function? | +{ | + struct perf_pmu_events_attr *attr; | + | + attr = kzalloc(sizeof(*attr), GFP_KERNEL); | + We recently needed following in 24x7 counters to keep lockdep happy: sysfs_attr_init(attr-attr.attr); | + attr-event_str = str; | + attr-attr.attr.name = name; | + attr-attr.attr.mode = 0444; | + attr-attr.show = perf_event_sysfs_show; | + | + return attr-attr.attr; | +} | + | +int update_events_in_group( static function? nit: do we need a new line before the first parameter? some functions in the file don't add the new line. | + struct nest_ima_events *p8_events, int nevents, struct nest_pmu *pmu) s/idx/nevents/? | +{ | + struct attribute_group *attr_group; | + struct attribute **attrs; | + int i; | + | + /* Allocate memory for event attribute group */ | + attr_group = kzalloc(((sizeof(struct attribute *) * (idx + 1)) + | + sizeof(*attr_group)), GFP_KERNEL); | + if (!attr_group) | + return -ENOMEM; | + | + attrs = (struct attribute **)(attr_group + 1); Can you add a comment on the +1? | + attr_group-name = events; | + attr_group-attrs = attrs; | + | + for (i = 0; i idx; i++, p8_events++) | + attrs[i] = dev_str_attr((char *)p8_events-ev_name, | + (char *)p8_events-ev_value); | + | + pmu-attr_groups[0] = attr_group; The -attr_groups[0] is initialized here, after the -attr_groups[1] and attr_groups[2] are initialized in caller. Since, -attr_groups[1] and -attr_groups[2] are set to global (loop-invariant) values, can we initialize all the attribute-groups here? May need to rename function. | + return 0; | +} | + | static int nest_pmu_create(struct device_node *dev, int pmu_index) | { | struct nest_ima_events **p8_events_arr, *p8_events; | @@ -91,6 +144,7 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) | /* Save the name to register it later */ | sprintf(buf, Nest_%s, (char *)pp-value); | pmu_ptr-pmu.name = (char *)buf; | + pmu_ptr-attr_groups[1] = p8_nest_format_group; | continue; | } | | @@ -122,6 +176,9 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) | idx++; | } | | + update_events_in_group( nit: need newline before first param? | + (struct nest_ima_events *)p8_events_arr, idx, pmu_ptr); | + | return 0; | } | | -- | 1.9.1 ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev